gandalff

package module
v0.0.0-...-aa5a87f Latest Latest
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 Go to latest Published: Dec 23, 2023 License: MIT Imports: 21 Imported by: 0

README

GANDALFF: Golang, ANother DatAframe Library For Fun 🧙‍♂️

Or, for short, GDL: Golang Dataframe Library

What is it?

Gandalff is a library for data wrangling in Go. The goal is to provide a simple and efficient API for data manipulation in Go, similar to Pandas or Polars in Python, and Dplyr in R. It supports nullable types: null data is optimized for memory usage.

Gandalff is a work in progress, and the API is not stable yet. However, it already supports the following formats:

  • CSV
  • XPT (SAS)
  • XLSX
  • HTML
  • Markdown

Examples

package main

import (
	"strings"

	gandalff "github.com/caerbannogwhite/gandalff"
)

func main() {
	data1 := `
name,age,weight,junior,department,salary band
Alice C,29,75.0,F,HR,4
John Doe,30,80.5,true,IT,2
Bob,31,85.0,F,IT,4
Jane H,25,60.0,false,IT,4
Mary,28,70.0,false,IT,3
Oliver,32,90.0,true,HR,1
Ursula,27,65.0,f,Business,4
Charlie,33,60.0,t,Business,2
Megan,26,55.0,F,IT,3
`

	gandalff.NewBaseDataFrame(gandalff.NewContext()).
		FromCsv().
		SetReader(strings.NewReader(data1)).
		Read().
		Select("department", "age", "weight", "junior").
		GroupBy("department").
		Agg(gandalff.Min("age"), gandalff.Max("weight"), gandalff.Mean("junior"), gandalff.Count()).
    Run().
		PrettyPrint(
      gandalff.NewPrettyPrintParams().
			  SetUseLipGloss(true))
}

// Output:
// ╭────────────┬─────────┬─────────┬─────────┬───────╮
// │ department │ age     │ weight  │ junior  │ n     │
// ├────────────┼─────────┼─────────┼─────────┼───────┤
// │ String     │ Float64 │ Float64 │ Float64 │ Int64 │
// ├────────────┼─────────┼─────────┼─────────┼───────┤
// │ HR         │   29.00 │   90.00 │  0.5000 │ 2.000 │
// │ IT         │   25.00 │   85.00 │  0.5000 │ 4.000 │
// │ Business   │   27.00 │   65.00 │  0.5000 │ 2.000 │
// ╰────────────┴─────────┴─────────┴─────────┴───────╯

Community

You can join the Gandalff community on Discord.

Supported data types

The data types not checked are not yet supported, but might be in the future.

  • Bool
  • Bool (memory optimized, not fully implemented yet)
  • Int16
  • Int
  • Int64
  • Float32
  • Float64
  • Complex64
  • Complex128
  • String
  • Time
  • Duration

Supported operations for Series

  • Filter

    • filter by bool slice
    • filter by int slice
    • filter by bool series
    • filter by int series

  • Group

    • Group (with nulls)
    • SubGroup (with nulls)

  • Map

  • Sort

    • Sort (with nulls)
    • SortRev (with nulls)

  • Take

Supported operations for DataFrame

  • Agg

  • Filter

  • GroupBy

  • Join

    • Inner
    • Left
    • Right
    • Outer
    • Inner with nulls
    • Left with nulls
    • Right with nulls
    • Outer with nulls

  • Map

  • OrderBy

  • Select

  • Take

  • Pivot

  • Stack/Append

Supported stats functions

  • Count
  • Sum
  • Mean
  • Median
  • Min
  • Max
  • StdDev
  • Variance
  • Quantile

Dependencies

Built with:

TODO

  • Improve filtering interface.
  • Improve dataframe PrettyPrint: add parameters, optimize data display, use lipgloss.
  • Implement string factors.
  • SeriesTime: set time format.
  • Implement Set(i []int, v []any) Series.
  • Add Slice(i []int) Series (using filter?).
  • Implement memory optimized Bool series with uint64.
  • Use uint64 for null mask.
  • Optimize XPT reader/writer with float32.
  • Add url resolver to each reader.
  • Add format option to each writer.
  • JSON reader by records.
  • Implement chunked series.
  • Implement OpenAI interface.
  • Implement Parquet reader and writer.
  • Implement SPSS reader and writer.
  • Implement SAS7BDAT reader and writer (https://cran.r-project.org/web/packages/sas7bdat/vignettes/sas7bdat.pdf)

Documentation

Index

Constants

View Source 
const (
	// The default capacity of a series.
	DEFAULT_SERIES_INITIAL_CAPACITY = 10

	// The default capacity of a hash map.
	DEFAULT_HASH_MAP_INITIAL_CAPACITY = 1024

	// The default capacity of a dense map array.
	DEFAULT_DENSE_MAP_ARRAY_INITIAL_CAPACITY = 64

	// Number of threads to use for parallel operations.
	THREADS_NUMBER = 16

	// Minimum number of elements to use parallel operations.
	MINIMUM_PARALLEL_SIZE_1 = 16_384
	MINIMUM_PARALLEL_SIZE_2 = 131_072

	HASH_MAGIC_NUMBER      = int64(0xa8f4979b77e3f93)
	HASH_MAGIC_NUMBER_NULL = int64(0x7fff4979b77e3f93)
	HASH_NULL_KEY          = int64(0x7ff8000000000001)

	INF_TEXT        = "Inf"
	NA_TEXT         = "Na"
	BOOL_TRUE_TEXT  = "true"
	BOOL_FALSE_TEXT = "false"

	CSV_READER_DEFAULT_DELIMITER           = ','
	CSV_READER_DEFAULT_HEADER              = true
	CSV_READER_DEFAULT_GUESS_DATA_TYPE_LEN = 1000

	XLSX_READER_DEFAULT_GUESS_DATA_TYPE_LEN = 1000
)
View Source 
const DEFAULT_COUNT_NAME = "n"

Variables

View Source 
var SpecialMissingValueRegex = regexp.MustCompile("^[A-Z_]\x00\x00\x00\x00\x00\x00\x00$")

Functions

func Count 

func Count() aggregator

func DivMod 

func DivMod(n, d int64) (q, r int64)

Python divmod build-in for Go.

func IsIbmSpecialMissingValue 

func IsIbmSpecialMissingValue(ieee float64) bool

Check if float is a SpecialMissingValue from an XPORT-format bytestring.

func Max 

func Max(name string) aggregator

func Mean 

func Mean(name string) aggregator

func Median 

func Median(name string) aggregator

func Min 

func Min(name string) aggregator

func NewNamestrV56 

func NewNamestrV56() *__NAMESTRv56

func NewNamestrV89 

func NewNamestrV89() *__NAMESTRv89

func Std 

func Std(name string) aggregator

func Sum 

func Sum(name string) aggregator

Types

type AggregateType 

type AggregateType int8
const (
	AGGREGATE_COUNT AggregateType = iota
	AGGREGATE_SUM
	AGGREGATE_MEAN
	AGGREGATE_MEDIAN
	AGGREGATE_MIN
	AGGREGATE_MAX
	AGGREGATE_STD
)

type BaseDataFrame 

type BaseDataFrame struct {
	// contains filtered or unexported fields
}

func (BaseDataFrame) AddSeries 

func (df BaseDataFrame) AddSeries(name string, series Series) DataFrame

func (BaseDataFrame) AddSeriesFromBools 

func (df BaseDataFrame) AddSeriesFromBools(name string, data []bool, nullMask []bool, makeCopy bool) DataFrame

func (BaseDataFrame) AddSeriesFromDurations 

func (df BaseDataFrame) AddSeriesFromDurations(name string, data []time.Duration, nullMask []bool, makeCopy bool) DataFrame

func (BaseDataFrame) AddSeriesFromFloat64s 

func (df BaseDataFrame) AddSeriesFromFloat64s(name string, data []float64, nullMask []bool, makeCopy bool) DataFrame

func (BaseDataFrame) AddSeriesFromInt64s 

func (df BaseDataFrame) AddSeriesFromInt64s(name string, data []int64, nullMask []bool, makeCopy bool) DataFrame

func (BaseDataFrame) AddSeriesFromInts 

func (df BaseDataFrame) AddSeriesFromInts(name string, data []int, nullMask []bool, makeCopy bool) DataFrame

func (BaseDataFrame) AddSeriesFromStrings 

func (df BaseDataFrame) AddSeriesFromStrings(name string, data []string, nullMask []bool, makeCopy bool) DataFrame

func (BaseDataFrame) AddSeriesFromTimes 

func (df BaseDataFrame) AddSeriesFromTimes(name string, data []time.Time, nullMask []bool, makeCopy bool) DataFrame

func (BaseDataFrame) Agg 

func (df BaseDataFrame) Agg(aggregators ...aggregator) aggregatorBuilder

func (BaseDataFrame) At 

func (df BaseDataFrame) At(index int) Series

Returns the series at the given index.

func (BaseDataFrame) C 

func (df BaseDataFrame) C(name string) Series

Returns the column with the given name.

func (BaseDataFrame) Describe 

func (df BaseDataFrame) Describe() string

func (BaseDataFrame) Filter 

func (df BaseDataFrame) Filter(mask any) DataFrame

func (BaseDataFrame) FromCsv 

func (df BaseDataFrame) FromCsv() *CsvReader

func (BaseDataFrame) FromJson 

func (df BaseDataFrame) FromJson() *JsonReader

func (BaseDataFrame) FromXlsx 

func (df BaseDataFrame) FromXlsx() *XlsxReader

func (BaseDataFrame) FromXpt 

func (df BaseDataFrame) FromXpt() *XptReader

func (BaseDataFrame) GetContext 

func (df BaseDataFrame) GetContext() *Context

GetContext returns the context of the dataframe.

func (BaseDataFrame) GetError 

func (df BaseDataFrame) GetError() error

func (BaseDataFrame) GetSeriesIndex 

func (df BaseDataFrame) GetSeriesIndex(name string) int

func (BaseDataFrame) GroupBy 

func (df BaseDataFrame) GroupBy(by ...string) DataFrame

func (BaseDataFrame) IsErrored 

func (df BaseDataFrame) IsErrored() bool

func (BaseDataFrame) IsGrouped 

func (df BaseDataFrame) IsGrouped() bool

func (BaseDataFrame) Join 

func (df BaseDataFrame) Join(how DataFrameJoinType, other DataFrame, on ...string) DataFrame

func (BaseDataFrame) Len 

func (df BaseDataFrame) Len() int

func (BaseDataFrame) Less 

func (df BaseDataFrame) Less(i, j int) bool

func (BaseDataFrame) NCols 

func (df BaseDataFrame) NCols() int

NCols returns the number of columns in the dataframe.

func (BaseDataFrame) NRows 

func (df BaseDataFrame) NRows() int

NRows returns the number of rows in the dataframe.

func (BaseDataFrame) NameAt 

func (df BaseDataFrame) NameAt(index int) string

Returns the series with the given name as a bool series.

func (BaseDataFrame) Names 

func (df BaseDataFrame) Names() []string

Names returns the names of the series in the dataframe.

func (BaseDataFrame) OrderBy 

func (df BaseDataFrame) OrderBy(params ...SortParam) DataFrame

func (BaseDataFrame) PPrint 

func (df BaseDataFrame) PPrint(params PPrintParams) DataFrame

Pretty print the dataframe.

func (BaseDataFrame) Records 

func (df BaseDataFrame) Records(header bool) [][]string

func (BaseDataFrame) Replace 

func (df BaseDataFrame) Replace(name string, s Series) DataFrame

func (BaseDataFrame) Select 

func (df BaseDataFrame) Select(selectors ...string) DataFrame

func (BaseDataFrame) SelectAt 

func (df BaseDataFrame) SelectAt(indices ...int) DataFrame

func (BaseDataFrame) Swap 

func (df BaseDataFrame) Swap(i, j int)

func (BaseDataFrame) Take 

func (df BaseDataFrame) Take(params ...int) DataFrame

func (BaseDataFrame) ToCsv 

func (df BaseDataFrame) ToCsv() *CsvWriter

func (BaseDataFrame) ToHtml 

func (df BaseDataFrame) ToHtml() *HtmlWriter

func (BaseDataFrame) ToJson 

func (df BaseDataFrame) ToJson() *JsonWriter

func (BaseDataFrame) ToMarkDown 

func (df BaseDataFrame) ToMarkDown() *MarkDownWriter

func (BaseDataFrame) ToXlsx 

func (df BaseDataFrame) ToXlsx() *XlsxWriter

func (BaseDataFrame) ToXpt 

func (df BaseDataFrame) ToXpt() *XptWriter

func (BaseDataFrame) Types 

func (df BaseDataFrame) Types() []preludiometa.BaseType

Types returns the types of the series in the dataframe.

func (BaseDataFrame) Ungroup 

func (df BaseDataFrame) Ungroup() DataFrame

type BaseDataFramePartitionEntry 

type BaseDataFramePartitionEntry struct {
	// contains filtered or unexported fields
}

type Context 

type Context struct {
	// contains filtered or unexported fields
}

func NewContext 

func NewContext() *Context

func (*Context) GetNaText 

func (ctx *Context) GetNaText() string

func (*Context) GetThreadsNumber 

func (ctx *Context) GetThreadsNumber() int

func (*Context) GetTimeFormat 

func (ctx *Context) GetTimeFormat() string

func (*Context) SetNaText 

func (ctx *Context) SetNaText(s string) *Context

func (*Context) SetThreadsNumber 

func (ctx *Context) SetThreadsNumber(n int) *Context

func (*Context) SetTimeFormat 

func (ctx *Context) SetTimeFormat(s string) *Context

type CsvReader 

type CsvReader struct {
	// contains filtered or unexported fields
}

func NewCsvReader 

func NewCsvReader(ctx *Context) *CsvReader

func (*CsvReader) Read 

func (r *CsvReader) Read() DataFrame

func (*CsvReader) SetContext 

func (r *CsvReader) SetContext(ctx *Context) *CsvReader

func (*CsvReader) SetDelimiter 

func (r *CsvReader) SetDelimiter(delimiter rune) *CsvReader

func (*CsvReader) SetGuessDataTypeLen 

func (r *CsvReader) SetGuessDataTypeLen(guessDataTypeLen int) *CsvReader

func (*CsvReader) SetHeader 

func (r *CsvReader) SetHeader(header bool) *CsvReader

func (*CsvReader) SetNullValues 

func (r *CsvReader) SetNullValues(nullValues bool) *CsvReader

func (*CsvReader) SetPath 

func (r *CsvReader) SetPath(path string) *CsvReader

func (*CsvReader) SetReader 

func (r *CsvReader) SetReader(reader io.Reader) *CsvReader

func (*CsvReader) SetRows 

func (r *CsvReader) SetRows(rows int) *CsvReader

func (*CsvReader) SetSchema 

func (r *CsvReader) SetSchema(schema *preludiometa.Schema) *CsvReader

type CsvWriter 

type CsvWriter struct {
	// contains filtered or unexported fields
}

func NewCsvWriter 

func NewCsvWriter() *CsvWriter

func (*CsvWriter) SetDataFrame 

func (w *CsvWriter) SetDataFrame(dataframe DataFrame) *CsvWriter

func (*CsvWriter) SetDelimiter 

func (w *CsvWriter) SetDelimiter(delimiter rune) *CsvWriter

func (*CsvWriter) SetFormat 

func (w *CsvWriter) SetFormat(format bool) *CsvWriter

func (*CsvWriter) SetHeader 

func (w *CsvWriter) SetHeader(header bool) *CsvWriter

func (*CsvWriter) SetNaText 

func (w *CsvWriter) SetNaText(naText string) *CsvWriter

func (*CsvWriter) SetPath 

func (w *CsvWriter) SetPath(path string) *CsvWriter

func (*CsvWriter) SetWriter 

func (w *CsvWriter) SetWriter(writer io.Writer) *CsvWriter

func (*CsvWriter) Write 

func (w *CsvWriter) Write() DataFrame

type DataFrame 

type DataFrame interface {

	// GetContext returns the context of the dataframe.
	GetContext() *Context

	// Names returns the names of the series in the dataframe.
	Names() []string
	// Types returns the types of the series in the dataframe.
	Types() []preludiometa.BaseType
	// NCols returns the number of columns in the dataframe.
	NCols() int
	// NRows returns the number of rows in the dataframe.
	NRows() int

	IsErrored() bool

	IsGrouped() bool

	GetError() error

	GetSeriesIndex(name string) int

	// AddSeries adds a generic series to the dataframe.
	AddSeries(name string, series Series) DataFrame
	// AddSeriesFromBools adds a series of bools to the dataframe.
	AddSeriesFromBools(name string, data []bool, nullMask []bool, makeCopy bool) DataFrame
	// AddSeriesFromInt32s adds a series of ints to the dataframe.
	AddSeriesFromInts(name string, data []int, nullMask []bool, makeCopy bool) DataFrame
	// AddSeriesFromInt64s adds a series of ints to the dataframe.
	AddSeriesFromInt64s(name string, data []int64, nullMask []bool, makeCopy bool) DataFrame
	// AddSeriesFromFloat64s adds a series of floats to the dataframe.
	AddSeriesFromFloat64s(name string, data []float64, nullMask []bool, makeCopy bool) DataFrame
	// AddSeriesFromStrings adds a series of strings to the dataframe.
	AddSeriesFromStrings(name string, data []string, nullMask []bool, makeCopy bool) DataFrame
	// AddSeriesFromTimes adds a series of times to the dataframe.
	AddSeriesFromTimes(name string, data []time.Time, nullMask []bool, makeCopy bool) DataFrame
	// AddSeriesFromDurations adds a series of durations to the dataframe.
	AddSeriesFromDurations(name string, data []time.Duration, nullMask []bool, makeCopy bool) DataFrame

	// Replace the series with the given name.
	Replace(name string, s Series) DataFrame

	// Returns the column with the given name.
	C(name string) Series

	// Returns the series at the given index.
	At(index int) Series

	// Returns the series with the given name as a bool series.
	NameAt(index int) string

	Select(selectors ...string) DataFrame

	SelectAt(indices ...int) DataFrame

	Filter(mask any) DataFrame

	GroupBy(by ...string) DataFrame

	Ungroup() DataFrame

	Join(how DataFrameJoinType, other DataFrame, on ...string) DataFrame

	Take(params ...int) DataFrame

	Agg(aggregators ...aggregator) aggregatorBuilder

	// Sort the dataframe.
	Len() int
	Less(i, j int) bool
	Swap(i, j int)
	OrderBy(params ...SortParam) DataFrame

	Describe() string
	Records(header bool) [][]string

	// Pretty print the dataframe.
	PPrint(params PPrintParams) DataFrame

	FromCsv() *CsvReader
	ToCsv() *CsvWriter

	FromJson() *JsonReader
	ToJson() *JsonWriter

	FromXpt() *XptReader
	ToXpt() *XptWriter

	FromXlsx() *XlsxReader
	ToXlsx() *XlsxWriter

	ToHtml() *HtmlWriter
	ToMarkDown() *MarkDownWriter
	// contains filtered or unexported methods
}

func NewBaseDataFrame 

func NewBaseDataFrame(ctx *Context) DataFrame

type DataFrameJoinType 

type DataFrameJoinType int8
const (
	INNER_JOIN DataFrameJoinType = iota
	LEFT_JOIN
	RIGHT_JOIN
	OUTER_JOIN
)

type Formatter 

type Formatter interface {
	Compute()
	GetMaxWidth() int
	Push(val any)
	Format(width int, val any, isNa bool) string
}

type HtmlWriter 

type HtmlWriter struct {
	// contains filtered or unexported fields
}

func NewHtmlWriter 

func NewHtmlWriter() *HtmlWriter

func (*HtmlWriter) SetDataFrame 

func (w *HtmlWriter) SetDataFrame(dataframe DataFrame) *HtmlWriter

func (*HtmlWriter) SetDatatables 

func (w *HtmlWriter) SetDatatables(datatables bool) *HtmlWriter

func (*HtmlWriter) SetIndent 

func (w *HtmlWriter) SetIndent(indent string) *HtmlWriter

func (*HtmlWriter) SetNaText 

func (w *HtmlWriter) SetNaText(naText string) *HtmlWriter

func (*HtmlWriter) SetNewLine 

func (w *HtmlWriter) SetNewLine(newLine string) *HtmlWriter

func (*HtmlWriter) SetPath 

func (w *HtmlWriter) SetPath(path string) *HtmlWriter

func (*HtmlWriter) SetWriter 

func (w *HtmlWriter) SetWriter(writer io.Writer) *HtmlWriter

func (*HtmlWriter) Write 

func (w *HtmlWriter) Write() DataFrame

type JsonReader 

type JsonReader struct {
	// contains filtered or unexported fields
}

func NewJsonReader 

func NewJsonReader(ctx *Context) *JsonReader

func (*JsonReader) Read 

func (r *JsonReader) Read() DataFrame

func (*JsonReader) SetPath 

func (r *JsonReader) SetPath(path string) *JsonReader

func (*JsonReader) SetReader 

func (r *JsonReader) SetReader(reader io.Reader) *JsonReader

func (*JsonReader) SetSchema 

func (r *JsonReader) SetSchema(schema *preludiometa.Schema) *JsonReader

type JsonWriter 

type JsonWriter struct {
	// contains filtered or unexported fields
}

func NewJsonWriter 

func NewJsonWriter() *JsonWriter

func (*JsonWriter) SetDataFrame 

func (w *JsonWriter) SetDataFrame(dataframe DataFrame) *JsonWriter

func (*JsonWriter) SetIndent 

func (w *JsonWriter) SetIndent(indent string) *JsonWriter

func (*JsonWriter) SetNewLine 

func (w *JsonWriter) SetNewLine(newLine string) *JsonWriter

func (*JsonWriter) SetPath 

func (w *JsonWriter) SetPath(path string) *JsonWriter

func (*JsonWriter) SetWriter 

func (w *JsonWriter) SetWriter(writer io.Writer) *JsonWriter

func (*JsonWriter) Write 

func (w *JsonWriter) Write() DataFrame

type MapFunc 

type MapFunc func(v any) any

type MapFuncNull 

type MapFuncNull func(v any, isNull bool) (any, bool)

type MarkDownWriter 

type MarkDownWriter struct {
	// contains filtered or unexported fields
}

func NewMarkDownWriter 

func NewMarkDownWriter() *MarkDownWriter

func (*MarkDownWriter) SetDataFrame 

func (w *MarkDownWriter) SetDataFrame(dataframe DataFrame) *MarkDownWriter

func (*MarkDownWriter) SetHeader 

func (w *MarkDownWriter) SetHeader(header bool) *MarkDownWriter

func (*MarkDownWriter) SetIndex 

func (w *MarkDownWriter) SetIndex(index bool) *MarkDownWriter

func (*MarkDownWriter) SetNaText 

func (w *MarkDownWriter) SetNaText(naText string) *MarkDownWriter

func (*MarkDownWriter) SetPath 

func (w *MarkDownWriter) SetPath(path string) *MarkDownWriter

func (*MarkDownWriter) SetWriter 

func (w *MarkDownWriter) SetWriter(writer io.Writer) *MarkDownWriter

func (*MarkDownWriter) Write 

func (w *MarkDownWriter) Write() DataFrame

type NullableBool 

type NullableBool struct {
	Valid bool
	Value bool
}

type NullableDuration 

type NullableDuration struct {
	Valid bool
	Value time.Duration
}

type NullableFloat32 

type NullableFloat32 struct {
	Valid bool
	Value float32
}

type NullableFloat64 

type NullableFloat64 struct {
	Valid bool
	Value float64
}

type NullableInt 

type NullableInt struct {
	Valid bool
	Value int
}

type NullableInt16 

type NullableInt16 struct {
	Valid bool
	Value int16
}

type NullableInt32 

type NullableInt32 struct {
	Valid bool
	Value int32
}

type NullableInt64 

type NullableInt64 struct {
	Valid bool
	Value int64
}

type NullableInt8 

type NullableInt8 struct {
	Valid bool
	Value int8
}

type NullableString 

type NullableString struct {
	Valid bool
	Value string
}

type NullableTime 

type NullableTime struct {
	Valid bool
	Value time.Time
}

type NumericFormatter 

type NumericFormatter struct {
	// contains filtered or unexported fields
}

func NewNumericFormatter 

func NewNumericFormatter() *NumericFormatter

func (*NumericFormatter) Compute 

func (f *NumericFormatter) Compute()

func (*NumericFormatter) Format 

func (f *NumericFormatter) Format(width int, val any, isNa bool) string

func (*NumericFormatter) GetMaxWidth 

func (f *NumericFormatter) GetMaxWidth() int

func (*NumericFormatter) Push 

func (f *NumericFormatter) Push(val any)

func (*NumericFormatter) SetDecimalDigits 

func (f *NumericFormatter) SetDecimalDigits(decimalDigits int) *NumericFormatter

func (*NumericFormatter) SetInfText 

func (f *NumericFormatter) SetInfText(infText string) *NumericFormatter

func (*NumericFormatter) SetJustifyLeft 

func (f *NumericFormatter) SetJustifyLeft(justifyLeft bool) *NumericFormatter

func (*NumericFormatter) SetMaxDigits 

func (f *NumericFormatter) SetMaxDigits(maxDigits int) *NumericFormatter

func (*NumericFormatter) SetMovingDigits 

func (f *NumericFormatter) SetMovingDigits(movingDigits int) *NumericFormatter

func (*NumericFormatter) SetNaText 

func (f *NumericFormatter) SetNaText(naText string) *NumericFormatter

func (*NumericFormatter) SetScientificThreshold 

func (f *NumericFormatter) SetScientificThreshold(scientificThreshold int) *NumericFormatter

func (*NumericFormatter) SetThreshold 

func (f *NumericFormatter) SetThreshold(threshold int) *NumericFormatter

func (*NumericFormatter) SetTruncateOutput 

func (f *NumericFormatter) SetTruncateOutput(truncateOutput bool) *NumericFormatter

func (*NumericFormatter) SetUseLipGloss 

func (f *NumericFormatter) SetUseLipGloss(useLipGloss bool) *NumericFormatter

type PPrintParams 

type PPrintParams struct {
	// contains filtered or unexported fields
}

func NewPPrintParams 

func NewPPrintParams() PPrintParams

func (PPrintParams) SetIndent 

func (ppp PPrintParams) SetIndent(s string) PPrintParams

func (PPrintParams) SetIndex 

func (ppp PPrintParams) SetIndex(b bool) PPrintParams

func (PPrintParams) SetMaxColWidth 

func (ppp PPrintParams) SetMaxColWidth(n int) PPrintParams

func (PPrintParams) SetMinColWidth 

func (ppp PPrintParams) SetMinColWidth(n int) PPrintParams

func (PPrintParams) SetNRows 

func (ppp PPrintParams) SetNRows(n int) PPrintParams

func (PPrintParams) SetTailLen 

func (ppp PPrintParams) SetTailLen(n int) PPrintParams

func (PPrintParams) SetUseLipGloss 

func (ppp PPrintParams) SetUseLipGloss(b bool) PPrintParams

func (PPrintParams) SetWidth 

func (ppp PPrintParams) SetWidth(n int) PPrintParams

type RowDataProvider 

type RowDataProvider interface {
	Read() ([]string, error)
}

type SasFloat 

type SasFloat []byte

SAS float numbers.

SAS supports 27 special missing values, allowing the categorization of missing data by tagging or labeling missing values using the letters A to Z or an underscore.

func NewSasFloat 

func NewSasFloat(b []byte) *SasFloat

func (*SasFloat) FromIeee 

func (sf *SasFloat) FromIeee(ieee float64, byteOrder binary.ByteOrder) error

Convert Python floating point numbers to IBM-format (bytes).

func (*SasFloat) ToIeee 

func (sf *SasFloat) ToIeee(byteOrder binary.ByteOrder) (float64, error)

Convert IBM-format floating point (bytes) to IEEE 754 64-bit (float).

type Series 

type Series interface {

	// Return the context of the series.
	GetContext() *Context
	// Return the number of elements in the series.
	Len() int
	// Return the type of the series.
	Type() preludiometa.BaseType
	// Return the type and cardinality of the series.
	TypeCard() preludiometa.BaseTypeCard
	// Return if the series is grouped.
	IsGrouped() bool
	// Return if the series admits null values.
	IsNullable() bool
	// Return if the series is sorted.
	IsSorted() SeriesSortOrder
	// Return if the series is error.
	IsError() bool
	// Return the error message of the series.
	GetError() string

	// Return if the series has null values.
	HasNull() bool
	// Return the number of null values in the series.
	NullCount() int
	// Return if the element at index i is null.
	IsNull(i int) bool
	// Return the null mask of the series.
	GetNullMask() []bool
	// Set the null mask of the series.
	SetNullMask(mask []bool) Series
	// Make the series nullable.
	MakeNullable() Series
	// Make the series non-nullable.
	MakeNonNullable() Series

	// Get the element at index i.
	Get(i int) any
	// Get the element at index i as a string.
	GetAsString(i int) string
	// Set the element at index i.
	Set(i int, v any) Series
	// Take the elements according to the given interval.
	Take(params ...int) Series

	// Append elements to the series.
	// Value can be a single value, slice of values,
	// a nullable value, a slice of nullable values or a series.
	Append(v any) Series

	// Return the actual data of the series.
	Data() any
	// Return the nullable data of the series.
	DataAsNullable() any
	// Return the data of the series as a slice of strings.
	DataAsString() []string

	// Cast the series to a given type.
	Cast(t preludiometa.BaseType) Series
	// Copie the series.
	Copy() Series

	// Filter out the elements by the given mask.
	// Mask can be a bool series, a slice of bools or a slice of ints.
	Filter(mask any) Series

	// Apply the given function to each element of the series.
	Map(f MapFunc) Series
	MapNull(f MapFuncNull) Series

	GroupBy(gp SeriesPartition) Series
	UnGroup() Series

	// Get the partition of the series.
	GetPartition() SeriesPartition

	// Sort Interface.
	Less(i, j int) bool

	Swap(i, j int)

	// Sort the elements of the series.
	Sort() Series
	SortRev() Series

	// Boolean operations.
	And(other any) Series
	Or(other any) Series

	// Arithmetic operations.
	Mul(other any) Series
	Div(other any) Series
	Mod(other any) Series
	Exp(other any) Series
	Add(other any) Series
	Sub(other any) Series

	// Logical operations.
	Eq(other any) Series
	Ne(other any) Series
	Gt(other any) Series
	Ge(other any) Series
	Lt(other any) Series
	Le(other any) Series
	// contains filtered or unexported methods
}

func NewSeries 

func NewSeries(data interface{}, nullMask []bool, makeCopy bool, memOpt bool, ctx *Context) Series

Build a Series from a generic interface. The interface can be a single value, slice of values, a nullable value, a slice of nullable values. If nullMask is nil then the series is not nullable.

type SeriesBool 

type SeriesBool struct {
	// contains filtered or unexported fields
}

SeriesBool represents a series of bools. The data is stored as a byte array, with each bit representing a bool.

func NewSeriesBool 

func NewSeriesBool(data []bool, nullMask []bool, makeCopy bool, ctx *Context) SeriesBool

Build a Bool Series, if nullMask is nil then the series is not nullable

func (SeriesBool) Add 

func (s SeriesBool) Add(other any) Series

func (SeriesBool) All 

func (s SeriesBool) All() bool

func (SeriesBool) And 

func (s SeriesBool) And(other any) Series

func (SeriesBool) Any 

func (s SeriesBool) Any() bool

func (SeriesBool) Append 

func (s SeriesBool) Append(v any) Series

Append appends a value or a slice of values to the series.

func (SeriesBool) Bools 

func (s SeriesBool) Bools() []bool

Return the underlying data as a slice of bools.

func (SeriesBool) Cast 

func (s SeriesBool) Cast(t preludiometa.BaseType) Series

Cast the series to a given type.

func (SeriesBool) Copy 

func (s SeriesBool) Copy() Series

Copy the series.

func (SeriesBool) Data 

func (s SeriesBool) Data() any

Return the elements of the series as a slice.

func (SeriesBool) DataAsNullable 

func (s SeriesBool) DataAsNullable() any

Return the underlying data as a slice of NullableBool.

func (SeriesBool) DataAsString 

func (s SeriesBool) DataAsString() []string

Return the data as a slice of strings.

func (SeriesBool) Div 

func (s SeriesBool) Div(other any) Series

func (SeriesBool) Eq 

func (s SeriesBool) Eq(other any) Series

func (SeriesBool) Exp 

func (s SeriesBool) Exp(other any) Series

func (SeriesBool) Filter 

func (s SeriesBool) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be SeriesBool, SeriesInt, bool slice or a int slice.

func (SeriesBool) Ge 

func (s SeriesBool) Ge(other any) Series

func (SeriesBool) Get 

func (s SeriesBool) Get(i int) any

Get the element at index i.

func (SeriesBool) GetAsString 

func (s SeriesBool) GetAsString(i int) string

Get the element at index i as a string.

func (SeriesBool) GetContext 

func (s SeriesBool) GetContext() *Context

Return the context of the series.

func (SeriesBool) GetError 

func (s SeriesBool) GetError() string

Return the error message of the series.

func (SeriesBool) GetNullMask 

func (s SeriesBool) GetNullMask() []bool

Return the null mask of the series.

func (SeriesBool) GetPartition 

func (s SeriesBool) GetPartition() SeriesPartition

Return the partition of the series.

func (SeriesBool) GroupBy 

func (s SeriesBool) GroupBy(partition SeriesPartition) Series

func (SeriesBool) Gt 

func (s SeriesBool) Gt(other any) Series

func (SeriesBool) HasNull 

func (s SeriesBool) HasNull() bool

Return if the series has null values.

func (SeriesBool) IsError 

func (s SeriesBool) IsError() bool

Return if the series is error.

func (SeriesBool) IsGrouped 

func (s SeriesBool) IsGrouped() bool

Return if the series is grouped.

func (SeriesBool) IsNull 

func (s SeriesBool) IsNull(i int) bool

Return if the element at index i is null.

func (SeriesBool) IsNullable 

func (s SeriesBool) IsNullable() bool

Return if the series admits null values.

func (SeriesBool) IsSorted 

func (s SeriesBool) IsSorted() SeriesSortOrder

Return if the series is sorted.

func (SeriesBool) Le 

func (s SeriesBool) Le(other any) Series

func (SeriesBool) Len 

func (s SeriesBool) Len() int

Return the number of elements in the series.

func (SeriesBool) Less 

func (s SeriesBool) Less(i, j int) bool

func (SeriesBool) Lt 

func (s SeriesBool) Lt(other any) Series

func (SeriesBool) MakeNonNullable 

func (s SeriesBool) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesBool) MakeNullable 

func (s SeriesBool) MakeNullable() Series

Make the series nullable.

func (SeriesBool) Map 

func (s SeriesBool) Map(f MapFunc) Series

Apply the given function to each element of the series.

func (SeriesBool) MapNull 

func (s SeriesBool) MapNull(f MapFuncNull) Series

Apply the given function to each element of the series.

func (SeriesBool) Mod 

func (s SeriesBool) Mod(other any) Series

func (SeriesBool) Mul 

func (s SeriesBool) Mul(other any) Series

func (SeriesBool) Ne 

func (s SeriesBool) Ne(other any) Series

func (SeriesBool) Not 

func (s SeriesBool) Not() Series

Not performs logical NOT operation on series

func (SeriesBool) NullCount 

func (s SeriesBool) NullCount() int

Return the number of null values in the series.

func (SeriesBool) Or 

func (s SeriesBool) Or(other any) Series

func (SeriesBool) Set 

func (s SeriesBool) Set(i int, v any) Series

Set the element at index i. The value must be of type bool or NullableBool.

func (SeriesBool) SetNullMask 

func (s SeriesBool) SetNullMask(mask []bool) Series

Set the null mask of the series.

func (SeriesBool) Sort 

func (s SeriesBool) Sort() Series

func (SeriesBool) SortRev 

func (s SeriesBool) SortRev() Series

func (SeriesBool) Sub 

func (s SeriesBool) Sub(other any) Series

func (SeriesBool) Swap 

func (s SeriesBool) Swap(i, j int)

func (SeriesBool) Take 

func (s SeriesBool) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesBool) Type 

func (s SeriesBool) Type() preludiometa.BaseType

Return the type of the series.

func (SeriesBool) TypeCard 

func (s SeriesBool) TypeCard() preludiometa.BaseTypeCard

Return the type and cardinality of the series.

func (SeriesBool) UnGroup 

func (s SeriesBool) UnGroup() Series

Ungroup the series.

type SeriesBoolPartition 

type SeriesBoolPartition struct {
	// contains filtered or unexported fields
}

A SeriesBoolPartition is a partition of a SeriesBool. Each key is a hash of a bool value, and each value is a slice of indices of the original series that are set to that value.

type SeriesDuration 

type SeriesDuration struct {
	// contains filtered or unexported fields
}

SeriesDuration represents a duration series.

func NewSeriesDuration 

func NewSeriesDuration(data []time.Duration, nullMask []bool, makeCopy bool, ctx *Context) SeriesDuration

Build a Duration Series, if nullMask is nil then the series is not nullable

func (SeriesDuration) Add 

func (s SeriesDuration) Add(other any) Series

func (SeriesDuration) And 

func (s SeriesDuration) And(other any) Series

func (SeriesDuration) Append 

func (s SeriesDuration) Append(v any) Series

Append appends a value or a slice of values to the series.

func (SeriesDuration) Cast 

func (s SeriesDuration) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesDuration) Copy 

func (s SeriesDuration) Copy() Series

Copy the series.

func (SeriesDuration) Data 

func (s SeriesDuration) Data() any

Return the elements of the series as a slice.

func (SeriesDuration) DataAsNullable 

func (s SeriesDuration) DataAsNullable() any

Return the underlying data as a slice of NullableDuration.

func (SeriesDuration) DataAsString 

func (s SeriesDuration) DataAsString() []string

Return the underlying data as a slice of strings.

func (SeriesDuration) Div 

func (s SeriesDuration) Div(other any) Series

func (SeriesDuration) Eq 

func (s SeriesDuration) Eq(other any) Series

func (SeriesDuration) Exp 

func (s SeriesDuration) Exp(other any) Series

func (SeriesDuration) Filter 

func (s SeriesDuration) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be SeriesBool, SeriesInt, bool slice or a int slice.

func (SeriesDuration) Ge 

func (s SeriesDuration) Ge(other any) Series

func (SeriesDuration) Get 

func (s SeriesDuration) Get(i int) any

Get the element at index i.

func (SeriesDuration) GetAsString 

func (s SeriesDuration) GetAsString(i int) string

Get the element at index i as a string.

func (SeriesDuration) GetContext 

func (s SeriesDuration) GetContext() *Context

Return the context of the series.

func (SeriesDuration) GetError 

func (s SeriesDuration) GetError() string

Return the error message of the series.

func (SeriesDuration) GetNullMask 

func (s SeriesDuration) GetNullMask() []bool

Return the null mask of the series.

func (SeriesDuration) GetPartition 

func (s SeriesDuration) GetPartition() SeriesPartition

Return the partition of the series.

func (SeriesDuration) GroupBy 

func (s SeriesDuration) GroupBy(partition SeriesPartition) Series

func (SeriesDuration) Gt 

func (s SeriesDuration) Gt(other any) Series

func (SeriesDuration) HasNull 

func (s SeriesDuration) HasNull() bool

Return if the series has null values.

func (SeriesDuration) IsError 

func (s SeriesDuration) IsError() bool

Return if the series is error.

func (SeriesDuration) IsGrouped 

func (s SeriesDuration) IsGrouped() bool

Return if the series is grouped.

func (SeriesDuration) IsNull 

func (s SeriesDuration) IsNull(i int) bool

Return if the element at index i is null.

func (SeriesDuration) IsNullable 

func (s SeriesDuration) IsNullable() bool

Return if the series admits null values.

func (SeriesDuration) IsSorted 

func (s SeriesDuration) IsSorted() SeriesSortOrder

Return if the series is sorted.

func (SeriesDuration) Le 

func (s SeriesDuration) Le(other any) Series

func (SeriesDuration) Len 

func (s SeriesDuration) Len() int

Return the number of elements in the series.

func (SeriesDuration) Less 

func (s SeriesDuration) Less(i, j int) bool

func (SeriesDuration) Lt 

func (s SeriesDuration) Lt(other any) Series

func (SeriesDuration) MakeNonNullable 

func (s SeriesDuration) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesDuration) MakeNullable 

func (s SeriesDuration) MakeNullable() Series

Make the series nullable.

func (SeriesDuration) Map 

func (s SeriesDuration) Map(f MapFunc) Series

Apply the given function to each element of the series.

func (SeriesDuration) MapNull 

func (s SeriesDuration) MapNull(f MapFuncNull) Series

Apply the given function to each element of the series.

func (SeriesDuration) Mod 

func (s SeriesDuration) Mod(other any) Series

func (SeriesDuration) Mul 

func (s SeriesDuration) Mul(other any) Series

func (SeriesDuration) Ne 

func (s SeriesDuration) Ne(other any) Series

func (SeriesDuration) NullCount 

func (s SeriesDuration) NullCount() int

Return the number of null values in the series.

func (SeriesDuration) Or 

func (s SeriesDuration) Or(other any) Series

func (SeriesDuration) Set 

func (s SeriesDuration) Set(i int, v any) Series

Set the element at index i. The value v must be of type time.Duration or NullableDuration.

func (SeriesDuration) SetNullMask 

func (s SeriesDuration) SetNullMask(mask []bool) Series

Set the null mask of the series.

func (SeriesDuration) Sort 

func (s SeriesDuration) Sort() Series

func (SeriesDuration) SortRev 

func (s SeriesDuration) SortRev() Series

func (SeriesDuration) Sub 

func (s SeriesDuration) Sub(other any) Series

func (SeriesDuration) Swap 

func (s SeriesDuration) Swap(i, j int)

func (SeriesDuration) Take 

func (s SeriesDuration) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesDuration) Times 

func (s SeriesDuration) Times() []time.Duration

Return the underlying data as a slice of time.Duration.

func (SeriesDuration) Type 

func (s SeriesDuration) Type() preludiometa.BaseType

Return the type of the series.

func (SeriesDuration) TypeCard 

func (s SeriesDuration) TypeCard() preludiometa.BaseTypeCard

Return the type and cardinality of the series.

func (SeriesDuration) UnGroup 

func (s SeriesDuration) UnGroup() Series

Ungroup the series.

type SeriesDurationPartition 

type SeriesDurationPartition struct {
	// contains filtered or unexported fields
}

A SeriesDurationPartition is a partition of a SeriesDuration. Each key is a hash of a bool value, and each value is a slice of indices of the original series that are set to that value.

type SeriesError 

type SeriesError struct {
	// contains filtered or unexported fields
}

Dummy series for error handling.

func NewSeriesError 

func NewSeriesError(err string) SeriesError

Build an Error Series

func (SeriesError) Add 

func (s SeriesError) Add(other any) Series

func (SeriesError) And 

func (s SeriesError) And(other any) Series

func (SeriesError) Append 

func (s SeriesError) Append(v any) Series

Append elements to the series.

func (SeriesError) Cast 

func (s SeriesError) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesError) Copy 

func (s SeriesError) Copy() Series

Copies the series.

func (SeriesError) Data 

func (s SeriesError) Data() any

Returns the actual data of the series.

func (SeriesError) DataAsNullable 

func (s SeriesError) DataAsNullable() any

Returns the nullable data of the series.

func (SeriesError) DataAsString 

func (s SeriesError) DataAsString() []string

Returns the data of the series as a slice of strings.

func (SeriesError) Div 

func (s SeriesError) Div(other any) Series

func (SeriesError) Eq 

func (s SeriesError) Eq(other any) Series

func (SeriesError) Exp 

func (s SeriesError) Exp(other any) Series

func (SeriesError) Filter 

func (s SeriesError) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be a bool series, a slice of bools or a slice of ints.

func (SeriesError) Ge 

func (s SeriesError) Ge(other any) Series

func (SeriesError) Get 

func (s SeriesError) Get(i int) any

Get the element at index i.

func (SeriesError) GetAsString 

func (s SeriesError) GetAsString(i int) string

func (SeriesError) GetContext 

func (s SeriesError) GetContext() *Context

Return the context of the series.

func (SeriesError) GetError 

func (s SeriesError) GetError() string

Returns the error message of the series.

func (SeriesError) GetNullMask 

func (s SeriesError) GetNullMask() []bool

Returns the null mask of the series.

func (SeriesError) GetPartition 

func (s SeriesError) GetPartition() SeriesPartition

func (SeriesError) GroupBy 

func (s SeriesError) GroupBy(gp SeriesPartition) Series

func (SeriesError) Gt 

func (s SeriesError) Gt(other any) Series

func (SeriesError) HasNull 

func (s SeriesError) HasNull() bool

Returns if the series has null values.

func (SeriesError) IsError 

func (s SeriesError) IsError() bool

Returns if the series is error.

func (SeriesError) IsGrouped 

func (s SeriesError) IsGrouped() bool

Returns if the series is grouped.

func (SeriesError) IsNull 

func (s SeriesError) IsNull(i int) bool

Returns if the element at index i is null.

func (SeriesError) IsNullable 

func (s SeriesError) IsNullable() bool

Returns if the series admits null values.

func (SeriesError) IsSorted 

func (s SeriesError) IsSorted() SeriesSortOrder

func (SeriesError) Le 

func (s SeriesError) Le(other any) Series

func (SeriesError) Len 

func (s SeriesError) Len() int

Returns the length of the series.

func (SeriesError) Less 

func (s SeriesError) Less(i, j int) bool

Sort interface.

func (SeriesError) Lt 

func (s SeriesError) Lt(other any) Series

func (SeriesError) MakeNonNullable 

func (s SeriesError) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesError) MakeNullable 

func (s SeriesError) MakeNullable() Series

Makes the series nullable.

func (SeriesError) Map 

func (s SeriesError) Map(f MapFunc) Series

func (SeriesError) MapNull 

func (s SeriesError) MapNull(f MapFuncNull) Series

func (SeriesError) Mod 

func (s SeriesError) Mod(other any) Series

func (SeriesError) Mul 

func (s SeriesError) Mul(other any) Series

func (SeriesError) Ne 

func (s SeriesError) Ne(other any) Series

func (SeriesError) NullCount 

func (s SeriesError) NullCount() int

Returns the number of null values in the series.

func (SeriesError) Or 

func (s SeriesError) Or(other any) Series

func (SeriesError) Set 

func (s SeriesError) Set(i int, v any) Series

Set the element at index i.

func (SeriesError) SetNullMask 

func (s SeriesError) SetNullMask(mask []bool) Series

Sets the null mask of the series.

func (SeriesError) Sort 

func (s SeriesError) Sort() Series

func (SeriesError) SortRev 

func (s SeriesError) SortRev() Series

func (SeriesError) Sub 

func (s SeriesError) Sub(other any) Series

func (SeriesError) Swap 

func (s SeriesError) Swap(i, j int)

func (SeriesError) Take 

func (s SeriesError) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesError) Type 

func (s SeriesError) Type() preludiometa.BaseType

Returns the type of the series.

func (SeriesError) TypeCard 

func (s SeriesError) TypeCard() preludiometa.BaseTypeCard

Returns the type and cardinality of the series.

func (SeriesError) UnGroup 

func (s SeriesError) UnGroup() Series

type SeriesFloat64 

type SeriesFloat64 struct {
	// contains filtered or unexported fields
}

SeriesFloat64 represents a series of floats.

func NewSeriesFloat64 

func NewSeriesFloat64(data []float64, nullMask []bool, makeCopy bool, ctx *Context) SeriesFloat64

Build a Float64 Series, if nullMask is nil then the series is not nullable

func (SeriesFloat64) Add 

func (s SeriesFloat64) Add(other any) Series

func (SeriesFloat64) And 

func (s SeriesFloat64) And(other any) Series

func (SeriesFloat64) Append 

func (s SeriesFloat64) Append(v any) Series

Append appends a value or a slice of values to the series.

func (SeriesFloat64) Cast 

func (s SeriesFloat64) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesFloat64) Copy 

func (s SeriesFloat64) Copy() Series

Copy the series.

func (SeriesFloat64) Data 

func (s SeriesFloat64) Data() any

Return the elements of the series as a slice.

func (SeriesFloat64) DataAsNullable 

func (s SeriesFloat64) DataAsNullable() any

Return the underlying data as a slice of NullableFloat64.

func (SeriesFloat64) DataAsString 

func (s SeriesFloat64) DataAsString() []string

Return the underlying data as a slice of strings.

func (SeriesFloat64) Div 

func (s SeriesFloat64) Div(other any) Series

func (SeriesFloat64) Eq 

func (s SeriesFloat64) Eq(other any) Series

func (SeriesFloat64) Exp 

func (s SeriesFloat64) Exp(other any) Series

func (SeriesFloat64) Filter 

func (s SeriesFloat64) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be SeriesBool, SeriesInt, bool slice or a int slice.

func (SeriesFloat64) Float64s 

func (s SeriesFloat64) Float64s() []float64

Return the underlying data as a slice of float64.

func (SeriesFloat64) Ge 

func (s SeriesFloat64) Ge(other any) Series

func (SeriesFloat64) Get 

func (s SeriesFloat64) Get(i int) any

Get the element at index i.

func (SeriesFloat64) GetAsString 

func (s SeriesFloat64) GetAsString(i int) string

Get the element at index i as a string.

func (SeriesFloat64) GetContext 

func (s SeriesFloat64) GetContext() *Context

Return the context of the series.

func (SeriesFloat64) GetError 

func (s SeriesFloat64) GetError() string

Return the error message of the series.

func (SeriesFloat64) GetNullMask 

func (s SeriesFloat64) GetNullMask() []bool

Return the null mask of the series.

func (SeriesFloat64) GetPartition 

func (s SeriesFloat64) GetPartition() SeriesPartition

Return the partition of the series.

func (SeriesFloat64) GroupBy 

func (s SeriesFloat64) GroupBy(partition SeriesPartition) Series

func (SeriesFloat64) Gt 

func (s SeriesFloat64) Gt(other any) Series

func (SeriesFloat64) HasNull 

func (s SeriesFloat64) HasNull() bool

Return if the series has null values.

func (SeriesFloat64) IsError 

func (s SeriesFloat64) IsError() bool

Return if the series is error.

func (SeriesFloat64) IsGrouped 

func (s SeriesFloat64) IsGrouped() bool

Return if the series is grouped.

func (SeriesFloat64) IsNull 

func (s SeriesFloat64) IsNull(i int) bool

Return if the element at index i is null.

func (SeriesFloat64) IsNullable 

func (s SeriesFloat64) IsNullable() bool

Return if the series admits null values.

func (SeriesFloat64) IsSorted 

func (s SeriesFloat64) IsSorted() SeriesSortOrder

Return if the series is sorted.

func (SeriesFloat64) Le 

func (s SeriesFloat64) Le(other any) Series

func (SeriesFloat64) Len 

func (s SeriesFloat64) Len() int

Return the number of elements in the series.

func (SeriesFloat64) Less 

func (s SeriesFloat64) Less(i, j int) bool

func (SeriesFloat64) Lt 

func (s SeriesFloat64) Lt(other any) Series

func (SeriesFloat64) MakeNonNullable 

func (s SeriesFloat64) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesFloat64) MakeNullable 

func (s SeriesFloat64) MakeNullable() Series

Make the series nullable.

func (SeriesFloat64) Map 

func (s SeriesFloat64) Map(f MapFunc) Series

Apply the given function to each element of the series.

func (SeriesFloat64) MapNull 

func (s SeriesFloat64) MapNull(f MapFuncNull) Series

Apply the given function to each element of the series.

func (SeriesFloat64) Min 

func (s SeriesFloat64) Min() any

func (SeriesFloat64) Mod 

func (s SeriesFloat64) Mod(other any) Series

func (SeriesFloat64) Mul 

func (s SeriesFloat64) Mul(other any) Series

func (SeriesFloat64) Ne 

func (s SeriesFloat64) Ne(other any) Series

func (SeriesFloat64) Neg 

func (s SeriesFloat64) Neg() Series

func (SeriesFloat64) NullCount 

func (s SeriesFloat64) NullCount() int

Return the number of null values in the series.

func (SeriesFloat64) Or 

func (s SeriesFloat64) Or(other any) Series

func (SeriesFloat64) Set 

func (s SeriesFloat64) Set(i int, v any) Series

Set the element at index i. The value v can be any belonging to types: int8, int16, int, int, int64, float32, float64 and their nullable versions.

func (SeriesFloat64) SetNullMask 

func (s SeriesFloat64) SetNullMask(mask []bool) Series

Set the null mask of the series.

func (SeriesFloat64) Sort 

func (s SeriesFloat64) Sort() Series

func (SeriesFloat64) SortRev 

func (s SeriesFloat64) SortRev() Series

func (SeriesFloat64) Sub 

func (s SeriesFloat64) Sub(other any) Series

func (SeriesFloat64) Swap 

func (s SeriesFloat64) Swap(i, j int)

func (SeriesFloat64) Take 

func (s SeriesFloat64) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesFloat64) Type 

func (s SeriesFloat64) Type() preludiometa.BaseType

Return the type of the series.

func (SeriesFloat64) TypeCard 

func (s SeriesFloat64) TypeCard() preludiometa.BaseTypeCard

Return the type and cardinality of the series.

func (SeriesFloat64) UnGroup 

func (s SeriesFloat64) UnGroup() Series

Ungroup the series.

type SeriesFloat64Partition 

type SeriesFloat64Partition struct {
	// contains filtered or unexported fields
}

A SeriesFloat64Partition is a partition of a SeriesFloat64. Each key is a hash of a bool value, and each value is a slice of indices of the original series that are set to that value.

type SeriesInt 

type SeriesInt struct {
	// contains filtered or unexported fields
}

SeriesInt represents a series of ints.

func NewSeriesInt 

func NewSeriesInt(data []int, nullMask []bool, makeCopy bool, ctx *Context) SeriesInt

Build a Int Series, if nullMask is nil then the series is not nullable

func (SeriesInt) Add 

func (s SeriesInt) Add(other any) Series

func (SeriesInt) And 

func (s SeriesInt) And(other any) Series

func (SeriesInt) Append 

func (s SeriesInt) Append(v any) Series

Append appends a value or a slice of values to the series.

func (SeriesInt) Cast 

func (s SeriesInt) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesInt) Copy 

func (s SeriesInt) Copy() Series

Copy the series.

func (SeriesInt) Data 

func (s SeriesInt) Data() any

Return the elements of the series as a slice.

func (SeriesInt) DataAsNullable 

func (s SeriesInt) DataAsNullable() any

Return the underlying data as a slice of NullableInt.

func (SeriesInt) DataAsString 

func (s SeriesInt) DataAsString() []string

Return the underlying data as a slice of strings.

func (SeriesInt) Div 

func (s SeriesInt) Div(other any) Series

func (SeriesInt) Eq 

func (s SeriesInt) Eq(other any) Series

func (SeriesInt) Exp 

func (s SeriesInt) Exp(other any) Series

func (SeriesInt) Filter 

func (s SeriesInt) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be SeriesBool, SeriesInt, bool slice or a int slice.

func (SeriesInt) Ge 

func (s SeriesInt) Ge(other any) Series

func (SeriesInt) Get 

func (s SeriesInt) Get(i int) any

Get the element at index i.

func (SeriesInt) GetAsString 

func (s SeriesInt) GetAsString(i int) string

Get the element at index i as a string.

func (SeriesInt) GetContext 

func (s SeriesInt) GetContext() *Context

Return the context of the series.

func (SeriesInt) GetError 

func (s SeriesInt) GetError() string

Return the error message of the series.

func (SeriesInt) GetNullMask 

func (s SeriesInt) GetNullMask() []bool

Return the null mask of the series.

func (SeriesInt) GetPartition 

func (s SeriesInt) GetPartition() SeriesPartition

Return the partition of the series.

func (SeriesInt) GroupBy 

func (s SeriesInt) GroupBy(partition SeriesPartition) Series

func (SeriesInt) Gt 

func (s SeriesInt) Gt(other any) Series

func (SeriesInt) HasNull 

func (s SeriesInt) HasNull() bool

Return if the series has null values.

func (SeriesInt) Ints 

func (s SeriesInt) Ints() []int

Return the underlying data as a slice of int.

func (SeriesInt) IsError 

func (s SeriesInt) IsError() bool

Return if the series is error.

func (SeriesInt) IsGrouped 

func (s SeriesInt) IsGrouped() bool

Return if the series is grouped.

func (SeriesInt) IsNull 

func (s SeriesInt) IsNull(i int) bool

Return if the element at index i is null.

func (SeriesInt) IsNullable 

func (s SeriesInt) IsNullable() bool

Return if the series admits null values.

func (SeriesInt) IsSorted 

func (s SeriesInt) IsSorted() SeriesSortOrder

Return if the series is sorted.

func (SeriesInt) Le 

func (s SeriesInt) Le(other any) Series

func (SeriesInt) Len 

func (s SeriesInt) Len() int

Return the number of elements in the series.

func (SeriesInt) Less 

func (s SeriesInt) Less(i, j int) bool

func (SeriesInt) Lt 

func (s SeriesInt) Lt(other any) Series

func (SeriesInt) MakeNonNullable 

func (s SeriesInt) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesInt) MakeNullable 

func (s SeriesInt) MakeNullable() Series

Make the series nullable.

func (SeriesInt) Map 

func (s SeriesInt) Map(f MapFunc) Series

Apply the given function to each element of the series.

func (SeriesInt) MapNull 

func (s SeriesInt) MapNull(f MapFuncNull) Series

Apply the given function to each element of the series.

func (SeriesInt) Mod 

func (s SeriesInt) Mod(other any) Series

func (SeriesInt) Mul 

func (s SeriesInt) Mul(other any) Series

func (SeriesInt) Ne 

func (s SeriesInt) Ne(other any) Series

func (SeriesInt) Neg 

func (s SeriesInt) Neg() Series

func (SeriesInt) NullCount 

func (s SeriesInt) NullCount() int

Return the number of null values in the series.

func (SeriesInt) Or 

func (s SeriesInt) Or(other any) Series

func (SeriesInt) Set 

func (s SeriesInt) Set(i int, v any) Series

Set the element at index i. The value v can be any belonging to types: int8, int16, int, int, int64 and their nullable versions.

func (SeriesInt) SetNullMask 

func (s SeriesInt) SetNullMask(mask []bool) Series

Set the null mask of the series.

func (SeriesInt) Sort 

func (s SeriesInt) Sort() Series

func (SeriesInt) SortRev 

func (s SeriesInt) SortRev() Series

func (SeriesInt) Sub 

func (s SeriesInt) Sub(other any) Series

func (SeriesInt) Swap 

func (s SeriesInt) Swap(i, j int)

func (SeriesInt) Take 

func (s SeriesInt) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesInt) Type 

func (s SeriesInt) Type() preludiometa.BaseType

Return the type of the series.

func (SeriesInt) TypeCard 

func (s SeriesInt) TypeCard() preludiometa.BaseTypeCard

Return the type and cardinality of the series.

func (SeriesInt) UnGroup 

func (s SeriesInt) UnGroup() Series

Ungroup the series.

type SeriesInt64 

type SeriesInt64 struct {
	// contains filtered or unexported fields
}

SeriesInt64 represents a series of ints.

func NewSeriesInt64 

func NewSeriesInt64(data []int64, nullMask []bool, makeCopy bool, ctx *Context) SeriesInt64

Build a Int64 Series, if nullMask is nil then the series is not nullable

func (SeriesInt64) Add 

func (s SeriesInt64) Add(other any) Series

func (SeriesInt64) And 

func (s SeriesInt64) And(other any) Series

func (SeriesInt64) Append 

func (s SeriesInt64) Append(v any) Series

Append appends a value or a slice of values to the series.

func (SeriesInt64) Cast 

func (s SeriesInt64) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesInt64) Copy 

func (s SeriesInt64) Copy() Series

Copy the series.

func (SeriesInt64) Data 

func (s SeriesInt64) Data() any

Return the elements of the series as a slice.

func (SeriesInt64) DataAsNullable 

func (s SeriesInt64) DataAsNullable() any

Return the underlying data as a slice of NullableInt64.

func (SeriesInt64) DataAsString 

func (s SeriesInt64) DataAsString() []string

Return the underlying data as a slice of strings.

func (SeriesInt64) Div 

func (s SeriesInt64) Div(other any) Series

func (SeriesInt64) Eq 

func (s SeriesInt64) Eq(other any) Series

func (SeriesInt64) Exp 

func (s SeriesInt64) Exp(other any) Series

func (SeriesInt64) Filter 

func (s SeriesInt64) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be SeriesBool, SeriesInt, bool slice or a int slice.

func (SeriesInt64) Ge 

func (s SeriesInt64) Ge(other any) Series

func (SeriesInt64) Get 

func (s SeriesInt64) Get(i int) any

Get the element at index i.

func (SeriesInt64) GetAsString 

func (s SeriesInt64) GetAsString(i int) string

Get the element at index i as a string.

func (SeriesInt64) GetContext 

func (s SeriesInt64) GetContext() *Context

Return the context of the series.

func (SeriesInt64) GetError 

func (s SeriesInt64) GetError() string

Return the error message of the series.

func (SeriesInt64) GetNullMask 

func (s SeriesInt64) GetNullMask() []bool

Return the null mask of the series.

func (SeriesInt64) GetPartition 

func (s SeriesInt64) GetPartition() SeriesPartition

Return the partition of the series.

func (SeriesInt64) GroupBy 

func (s SeriesInt64) GroupBy(partition SeriesPartition) Series

func (SeriesInt64) Gt 

func (s SeriesInt64) Gt(other any) Series

func (SeriesInt64) HasNull 

func (s SeriesInt64) HasNull() bool

Return if the series has null values.

func (SeriesInt64) Int64s 

func (s SeriesInt64) Int64s() []int64

Return the underlying data as a slice of int64.

func (SeriesInt64) IsError 

func (s SeriesInt64) IsError() bool

Return if the series is error.

func (SeriesInt64) IsGrouped 

func (s SeriesInt64) IsGrouped() bool

Return if the series is grouped.

func (SeriesInt64) IsNull 

func (s SeriesInt64) IsNull(i int) bool

Return if the element at index i is null.

func (SeriesInt64) IsNullable 

func (s SeriesInt64) IsNullable() bool

Return if the series admits null values.

func (SeriesInt64) IsSorted 

func (s SeriesInt64) IsSorted() SeriesSortOrder

Return if the series is sorted.

func (SeriesInt64) Le 

func (s SeriesInt64) Le(other any) Series

func (SeriesInt64) Len 

func (s SeriesInt64) Len() int

Return the number of elements in the series.

func (SeriesInt64) Less 

func (s SeriesInt64) Less(i, j int) bool

func (SeriesInt64) Lt 

func (s SeriesInt64) Lt(other any) Series

func (SeriesInt64) MakeNonNullable 

func (s SeriesInt64) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesInt64) MakeNullable 

func (s SeriesInt64) MakeNullable() Series

Make the series nullable.

func (SeriesInt64) Map 

func (s SeriesInt64) Map(f MapFunc) Series

Apply the given function to each element of the series.

func (SeriesInt64) MapNull 

func (s SeriesInt64) MapNull(f MapFuncNull) Series

Apply the given function to each element of the series.

func (SeriesInt64) Mod 

func (s SeriesInt64) Mod(other any) Series

func (SeriesInt64) Mul 

func (s SeriesInt64) Mul(other any) Series

func (SeriesInt64) Ne 

func (s SeriesInt64) Ne(other any) Series

func (SeriesInt64) Neg 

func (s SeriesInt64) Neg() Series

func (SeriesInt64) NullCount 

func (s SeriesInt64) NullCount() int

Return the number of null values in the series.

func (SeriesInt64) Or 

func (s SeriesInt64) Or(other any) Series

func (SeriesInt64) Set 

func (s SeriesInt64) Set(i int, v any) Series

Set the element at index i. The value v can be any belonging to types: int8, int16, int, int, int64 and their nullable versions.

func (SeriesInt64) SetNullMask 

func (s SeriesInt64) SetNullMask(mask []bool) Series

Set the null mask of the series.

func (SeriesInt64) Sort 

func (s SeriesInt64) Sort() Series

func (SeriesInt64) SortRev 

func (s SeriesInt64) SortRev() Series

func (SeriesInt64) Sub 

func (s SeriesInt64) Sub(other any) Series

func (SeriesInt64) Swap 

func (s SeriesInt64) Swap(i, j int)

func (SeriesInt64) Take 

func (s SeriesInt64) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesInt64) Type 

func (s SeriesInt64) Type() preludiometa.BaseType

Return the type of the series.

func (SeriesInt64) TypeCard 

func (s SeriesInt64) TypeCard() preludiometa.BaseTypeCard

Return the type and cardinality of the series.

func (SeriesInt64) UnGroup 

func (s SeriesInt64) UnGroup() Series

Ungroup the series.

type SeriesInt64Partition 

type SeriesInt64Partition struct {
	// contains filtered or unexported fields
}

A SeriesInt64Partition is a partition of a SeriesInt64. Each key is a hash of a bool value, and each value is a slice of indices of the original series that are set to that value.

type SeriesIntPartition 

type SeriesIntPartition struct {
	// contains filtered or unexported fields
}

A SeriesIntPartition is a partition of a SeriesInt. Each key is a hash of a bool value, and each value is a slice of indices of the original series that are set to that value.

type SeriesNA 

type SeriesNA struct {
	// contains filtered or unexported fields
}

SeriesNA represents a series with no data.

func NewSeriesNA 

func NewSeriesNA(size int, ctx *Context) SeriesNA

Build an NA Series

func (SeriesNA) Add 

func (s SeriesNA) Add(other any) Series

func (SeriesNA) And 

func (s SeriesNA) And(other any) Series

func (SeriesNA) Append 

func (s SeriesNA) Append(v any) Series

Append elements to the series.

func (SeriesNA) Cast 

func (s SeriesNA) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesNA) Copy 

func (s SeriesNA) Copy() Series

Copies the series.

func (SeriesNA) Data 

func (s SeriesNA) Data() any

Returns the actual data of the series.

func (SeriesNA) DataAsNullable 

func (s SeriesNA) DataAsNullable() any

Returns the nullable data of the series.

func (SeriesNA) DataAsString 

func (s SeriesNA) DataAsString() []string

Returns the data of the series as a slice of strings.

func (SeriesNA) Div 

func (s SeriesNA) Div(other any) Series

func (SeriesNA) Eq 

func (s SeriesNA) Eq(other any) Series

func (SeriesNA) Exp 

func (s SeriesNA) Exp(other any) Series

func (SeriesNA) Filter 

func (s SeriesNA) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be a bool series, a slice of bools or a slice of ints.

func (SeriesNA) Ge 

func (s SeriesNA) Ge(other any) Series

func (SeriesNA) Get 

func (s SeriesNA) Get(i int) any

Get the element at index i.

func (SeriesNA) GetAsString 

func (s SeriesNA) GetAsString(i int) string

func (SeriesNA) GetContext 

func (s SeriesNA) GetContext() *Context

Return the context of the series.

func (SeriesNA) GetError 

func (s SeriesNA) GetError() string

Returns the error message of the series.

func (SeriesNA) GetNullMask 

func (s SeriesNA) GetNullMask() []bool

Returns the null mask of the series.

func (SeriesNA) GetPartition 

func (s SeriesNA) GetPartition() SeriesPartition

func (SeriesNA) GroupBy 

func (s SeriesNA) GroupBy(gp SeriesPartition) Series

func (SeriesNA) Gt 

func (s SeriesNA) Gt(other any) Series

func (SeriesNA) HasNull 

func (s SeriesNA) HasNull() bool

Returns if the series has null values.

func (SeriesNA) IsError 

func (s SeriesNA) IsError() bool

Returns if the series is error.

func (SeriesNA) IsGrouped 

func (s SeriesNA) IsGrouped() bool

Returns if the series is grouped.

func (SeriesNA) IsNull 

func (s SeriesNA) IsNull(i int) bool

Returns if the element at index i is null.

func (SeriesNA) IsNullable 

func (s SeriesNA) IsNullable() bool

Returns if the series admits null values.

func (SeriesNA) IsSorted 

func (s SeriesNA) IsSorted() SeriesSortOrder

func (SeriesNA) Le 

func (s SeriesNA) Le(other any) Series

func (SeriesNA) Len 

func (s SeriesNA) Len() int

Returns the length of the series.

func (SeriesNA) Less 

func (s SeriesNA) Less(i, j int) bool

Sort interface.

func (SeriesNA) Lt 

func (s SeriesNA) Lt(other any) Series

func (SeriesNA) MakeNonNullable 

func (s SeriesNA) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesNA) MakeNullable 

func (s SeriesNA) MakeNullable() Series

Makes the series nullable.

func (SeriesNA) Map 

func (s SeriesNA) Map(f MapFunc) Series

func (SeriesNA) MapNull 

func (s SeriesNA) MapNull(f MapFuncNull) Series

func (SeriesNA) Mod 

func (s SeriesNA) Mod(other any) Series

func (SeriesNA) Mul 

func (s SeriesNA) Mul(other any) Series

func (SeriesNA) Ne 

func (s SeriesNA) Ne(other any) Series

func (SeriesNA) Not 

func (s SeriesNA) Not() Series

func (SeriesNA) NullCount 

func (s SeriesNA) NullCount() int

Returns the number of null values in the series.

func (SeriesNA) Or 

func (s SeriesNA) Or(other any) Series

func (SeriesNA) Set 

func (s SeriesNA) Set(i int, v any) Series

Set the element at index i.

func (SeriesNA) SetNullMask 

func (s SeriesNA) SetNullMask(mask []bool) Series

Sets the null mask of the series.

func (SeriesNA) Sort 

func (s SeriesNA) Sort() Series

func (SeriesNA) SortRev 

func (s SeriesNA) SortRev() Series

func (SeriesNA) Sub 

func (s SeriesNA) Sub(other any) Series

func (SeriesNA) Swap 

func (s SeriesNA) Swap(i, j int)

func (SeriesNA) Take 

func (s SeriesNA) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesNA) Type 

func (s SeriesNA) Type() preludiometa.BaseType

Returns the type of the series.

func (SeriesNA) TypeCard 

func (s SeriesNA) TypeCard() preludiometa.BaseTypeCard

Returns the type and cardinality of the series.

func (SeriesNA) UnGroup 

func (s SeriesNA) UnGroup() Series

type SeriesNAPartition 

type SeriesNAPartition struct {
	// contains filtered or unexported fields
}

type SeriesNumeric 

type SeriesNumeric interface {
	Series

	// Return the minimum value of the series.
	Min() any
	// Return the maximum value of the series.
	Max() any
	// Return the sum of the values of the series.
	Sum() any
	// Return the mean of the values of the series.
	Mean() any
	// Return the median of the values of the series.
	Median() any
	// Return the variance of the values of the series.
	Variance() any
	// Return the standard deviation of the values of the series.
	StdDev() any
	// Return the quantile of the values of the series.
	Quantile(q any) any
}

type SeriesPartition 

type SeriesPartition interface {
	// contains filtered or unexported methods
}

type SeriesSortOrder 

type SeriesSortOrder int16
const (
	// The series is not sorted.
	SORTED_NONE SeriesSortOrder = iota
	// The series is sorted in ascending order.
	SORTED_ASC
	// The series is sorted in descending order.
	SORTED_DESC
)

type SeriesString 

type SeriesString struct {
	// contains filtered or unexported fields
}

SeriesString represents a series of strings.

func NewSeriesString 

func NewSeriesString(data []string, nullMask []bool, makeCopy bool, ctx *Context) SeriesString

Build a String Series, if nullMask is nil then the series is not nullable

func (SeriesString) Add 

func (s SeriesString) Add(other any) Series

func (SeriesString) And 

func (s SeriesString) And(other any) Series

func (SeriesString) Append 

func (s SeriesString) Append(v any) Series

Append appends a value or a slice of values to the series.

func (SeriesString) Cast 

func (s SeriesString) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesString) Copy 

func (s SeriesString) Copy() Series

Copy the series.

func (SeriesString) Data 

func (s SeriesString) Data() any

Return the elements of the series as a slice.

func (SeriesString) DataAsNullable 

func (s SeriesString) DataAsNullable() any

Return the underlying data as a slice of NullableString.

func (SeriesString) DataAsString 

func (s SeriesString) DataAsString() []string

Return the underlying data as a slice of string.

func (SeriesString) Div 

func (s SeriesString) Div(other any) Series

func (SeriesString) Eq 

func (s SeriesString) Eq(other any) Series

func (SeriesString) Exp 

func (s SeriesString) Exp(other any) Series

func (SeriesString) Filter 

func (s SeriesString) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be SeriesBool, SeriesInt, bool slice or a int slice.

func (SeriesString) Ge 

func (s SeriesString) Ge(other any) Series

func (SeriesString) Get 

func (s SeriesString) Get(i int) any

Get the element at index i.

func (SeriesString) GetAsString 

func (s SeriesString) GetAsString(i int) string

Get the element at index i as a string.

func (SeriesString) GetContext 

func (s SeriesString) GetContext() *Context

Return the context of the series.

func (SeriesString) GetError 

func (s SeriesString) GetError() string

Return the error message of the series.

func (SeriesString) GetNullMask 

func (s SeriesString) GetNullMask() []bool

Return the null mask of the series.

func (SeriesString) GetPartition 

func (s SeriesString) GetPartition() SeriesPartition

Return the partition of the series.

func (SeriesString) GroupBy 

func (s SeriesString) GroupBy(partition SeriesPartition) Series

func (SeriesString) Gt 

func (s SeriesString) Gt(other any) Series

func (SeriesString) HasNull 

func (s SeriesString) HasNull() bool

Return if the series has null values.

func (SeriesString) IsError 

func (s SeriesString) IsError() bool

Return if the series is error.

func (SeriesString) IsGrouped 

func (s SeriesString) IsGrouped() bool

Return if the series is grouped.

func (SeriesString) IsNull 

func (s SeriesString) IsNull(i int) bool

Return if the element at index i is null.

func (SeriesString) IsNullable 

func (s SeriesString) IsNullable() bool

Return if the series admits null values.

func (SeriesString) IsSorted 

func (s SeriesString) IsSorted() SeriesSortOrder

Return if the series is sorted.

func (SeriesString) Le 

func (s SeriesString) Le(other any) Series

func (SeriesString) Len 

func (s SeriesString) Len() int

Return the number of elements in the series.

func (SeriesString) Less 

func (s SeriesString) Less(i, j int) bool

func (SeriesString) Lt 

func (s SeriesString) Lt(other any) Series

func (SeriesString) MakeNonNullable 

func (s SeriesString) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesString) MakeNullable 

func (s SeriesString) MakeNullable() Series

Make the series nullable.

func (SeriesString) Map 

func (s SeriesString) Map(f MapFunc) Series

Apply the given function to each element of the series.

func (SeriesString) MapNull 

func (s SeriesString) MapNull(f MapFuncNull) Series

Apply the given function to each element of the series.

func (SeriesString) Mod 

func (s SeriesString) Mod(other any) Series

func (SeriesString) Mul 

func (s SeriesString) Mul(other any) Series

func (SeriesString) Ne 

func (s SeriesString) Ne(other any) Series

func (SeriesString) NullCount 

func (s SeriesString) NullCount() int

Return the number of null values in the series.

func (SeriesString) Or 

func (s SeriesString) Or(other any) Series

func (SeriesString) ParseTime 

func (s SeriesString) ParseTime(layout string) Series

Parse the series as a time series.

func (SeriesString) Replace 

func (s SeriesString) Replace(old, new string, n int) Series

func (SeriesString) Set 

func (s SeriesString) Set(i int, v any) Series

Set the element at index i. The value v must be of type string or NullableString.

func (SeriesString) SetNullMask 

func (s SeriesString) SetNullMask(mask []bool) Series

Set the null mask of the series.

func (SeriesString) Sort 

func (s SeriesString) Sort() Series

func (SeriesString) SortRev 

func (s SeriesString) SortRev() Series

func (SeriesString) Strings 

func (s SeriesString) Strings() []string

Return the underlying data as a slice of string.

func (SeriesString) Sub 

func (s SeriesString) Sub(other any) Series

func (SeriesString) Swap 

func (s SeriesString) Swap(i, j int)

func (SeriesString) Take 

func (s SeriesString) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesString) ToLower 

func (s SeriesString) ToLower() Series

func (SeriesString) ToUpper 

func (s SeriesString) ToUpper() Series

func (SeriesString) Trim 

func (s SeriesString) Trim(cutset string) Series

func (SeriesString) TrimSpace 

func (s SeriesString) TrimSpace() Series

func (SeriesString) Type 

func (s SeriesString) Type() preludiometa.BaseType

Return the type of the series.

func (SeriesString) TypeCard 

func (s SeriesString) TypeCard() preludiometa.BaseTypeCard

Return the type and cardinality of the series.

func (SeriesString) UnGroup 

func (s SeriesString) UnGroup() Series

Ungroup the series.

type SeriesStringPartition 

type SeriesStringPartition struct {
	// contains filtered or unexported fields
}

A SeriesStringPartition is a partition of a SeriesString. Each key is a hash of a bool value, and each value is a slice of indices of the original series that are set to that value.

type SeriesTime 

type SeriesTime struct {
	// contains filtered or unexported fields
}

SeriesTime represents a datetime series.

func NewSeriesTime 

func NewSeriesTime(data []time.Time, nullMask []bool, makeCopy bool, ctx *Context) SeriesTime

Build a Time Series, if nullMask is nil then the series is not nullable

func (SeriesTime) Add 

func (s SeriesTime) Add(other any) Series

func (SeriesTime) And 

func (s SeriesTime) And(other any) Series

func (SeriesTime) Append 

func (s SeriesTime) Append(v any) Series

Append appends a value or a slice of values to the series.

func (SeriesTime) Cast 

func (s SeriesTime) Cast(t preludiometa.BaseType) Series

Casts the series to a given type.

func (SeriesTime) Copy 

func (s SeriesTime) Copy() Series

Copy the series.

func (SeriesTime) Data 

func (s SeriesTime) Data() any

Return the elements of the series as a slice.

func (SeriesTime) DataAsNullable 

func (s SeriesTime) DataAsNullable() any

Return the underlying data as a slice of NullableTime.

func (SeriesTime) DataAsString 

func (s SeriesTime) DataAsString() []string

Return the underlying data as a slice of strings.

func (SeriesTime) Div 

func (s SeriesTime) Div(other any) Series

func (SeriesTime) Eq 

func (s SeriesTime) Eq(other any) Series

func (SeriesTime) Exp 

func (s SeriesTime) Exp(other any) Series

func (SeriesTime) Filter 

func (s SeriesTime) Filter(mask any) Series

Filters out the elements by the given mask. Mask can be SeriesBool, SeriesInt, bool slice or a int slice.

func (SeriesTime) Ge 

func (s SeriesTime) Ge(other any) Series

func (SeriesTime) Get 

func (s SeriesTime) Get(i int) any

Get the element at index i.

func (SeriesTime) GetAsString 

func (s SeriesTime) GetAsString(i int) string

Get the element at index i as a string.

func (SeriesTime) GetContext 

func (s SeriesTime) GetContext() *Context

Return the context of the series.

func (SeriesTime) GetError 

func (s SeriesTime) GetError() string

Return the error message of the series.

func (SeriesTime) GetNullMask 

func (s SeriesTime) GetNullMask() []bool

Return the null mask of the series.

func (SeriesTime) GetPartition 

func (s SeriesTime) GetPartition() SeriesPartition

Return the partition of the series.

func (SeriesTime) GetTimeFormat 

func (s SeriesTime) GetTimeFormat() string

Get the time format of the series.

func (SeriesTime) GroupBy 

func (s SeriesTime) GroupBy(partition SeriesPartition) Series

func (SeriesTime) Gt 

func (s SeriesTime) Gt(other any) Series

func (SeriesTime) HasNull 

func (s SeriesTime) HasNull() bool

Return if the series has null values.

func (SeriesTime) IsError 

func (s SeriesTime) IsError() bool

Return if the series is error.

func (SeriesTime) IsGrouped 

func (s SeriesTime) IsGrouped() bool

Return if the series is grouped.

func (SeriesTime) IsNull 

func (s SeriesTime) IsNull(i int) bool

Return if the element at index i is null.

func (SeriesTime) IsNullable 

func (s SeriesTime) IsNullable() bool

Return if the series admits null values.

func (SeriesTime) IsSorted 

func (s SeriesTime) IsSorted() SeriesSortOrder

Return if the series is sorted.

func (SeriesTime) Le 

func (s SeriesTime) Le(other any) Series

func (SeriesTime) Len 

func (s SeriesTime) Len() int

Return the number of elements in the series.

func (SeriesTime) Less 

func (s SeriesTime) Less(i, j int) bool

func (SeriesTime) Lt 

func (s SeriesTime) Lt(other any) Series

func (SeriesTime) MakeNonNullable 

func (s SeriesTime) MakeNonNullable() Series

Make the series non-nullable.

func (SeriesTime) MakeNullable 

func (s SeriesTime) MakeNullable() Series

Make the series nullable.

func (SeriesTime) Map 

func (s SeriesTime) Map(f MapFunc) Series

Apply the given function to each element of the series.

func (SeriesTime) MapNull 

func (s SeriesTime) MapNull(f MapFuncNull) Series

Apply the given function to each element of the series.

func (SeriesTime) Mod 

func (s SeriesTime) Mod(other any) Series

func (SeriesTime) Mul 

func (s SeriesTime) Mul(other any) Series

func (SeriesTime) Ne 

func (s SeriesTime) Ne(other any) Series

func (SeriesTime) NullCount 

func (s SeriesTime) NullCount() int

Return the number of null values in the series.

func (SeriesTime) Or 

func (s SeriesTime) Or(other any) Series

func (SeriesTime) Set 

func (s SeriesTime) Set(i int, v any) Series

Set the element at index i. The value v must be of type time.Time or NullableTime.

func (SeriesTime) SetNullMask 

func (s SeriesTime) SetNullMask(mask []bool) Series

Set the null mask of the series.

func (SeriesTime) SetTimeFormat 

func (s SeriesTime) SetTimeFormat(format string) Series

Set the time format of the series.

func (SeriesTime) Sort 

func (s SeriesTime) Sort() Series

func (SeriesTime) SortRev 

func (s SeriesTime) SortRev() Series

func (SeriesTime) Sub 

func (s SeriesTime) Sub(other any) Series

func (SeriesTime) Swap 

func (s SeriesTime) Swap(i, j int)

func (SeriesTime) Take 

func (s SeriesTime) Take(params ...int) Series

Take the elements according to the given interval.

func (SeriesTime) Times 

func (s SeriesTime) Times() []time.Time

Return the underlying data as a slice of time.Time.

func (SeriesTime) Type 

func (s SeriesTime) Type() preludiometa.BaseType

Return the type of the series.

func (SeriesTime) TypeCard 

func (s SeriesTime) TypeCard() preludiometa.BaseTypeCard

Return the type and cardinality of the series.

func (SeriesTime) UnGroup 

func (s SeriesTime) UnGroup() Series

Ungroup the series.

type SeriesTimePartition 

type SeriesTimePartition struct {
	// contains filtered or unexported fields
}

A SeriesTimePartition is a partition of a SeriesTime. Each key is a hash of a bool value, and each value is a slice of indices of the original series that are set to that value.

type SortParam 

type SortParam struct {
	// contains filtered or unexported fields
}

func Asc 

func Asc(name string) SortParam

func Desc 

func Desc(name string) SortParam

type StringFormatter 

type StringFormatter struct {
	// contains filtered or unexported fields
}

func NewStringFormatter 

func NewStringFormatter() *StringFormatter

func (*StringFormatter) Compute 

func (f *StringFormatter) Compute()

func (*StringFormatter) Format 

func (f *StringFormatter) Format(width int, val any, isNa bool) string

func (*StringFormatter) GetMaxWidth 

func (f *StringFormatter) GetMaxWidth() int

func (*StringFormatter) Push 

func (f *StringFormatter) Push(val any)

func (*StringFormatter) SetUseLipGloss 

func (f *StringFormatter) SetUseLipGloss(useLipGloss bool) *StringFormatter

type StringPool 

type StringPool struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

func NewStringPool 

func NewStringPool() *StringPool

func (*StringPool) Get 

func (sp *StringPool) Get(s string) *string

Get returns the address of the string if it exists in the pool, otherwise nil.

func (*StringPool) Len 

func (sp *StringPool) Len() int

func (*StringPool) Put 

func (sp *StringPool) Put(s string) *string

Put returns the address of the string if it exists in the pool, otherwise it adds it to the pool and returns its address.

func (*StringPool) PutSync 

func (sp *StringPool) PutSync(s string) *string

PutSync returns the address of the string if it exists in the pool, otherwise it adds it to the pool and returns its address. This version is thread-safe.

func (*StringPool) SetNaText 

func (sp *StringPool) SetNaText(s string) *StringPool

func (*StringPool) ToString 

func (sp *StringPool) ToString() string

type XlsxReader 

type XlsxReader struct {
	// contains filtered or unexported fields
}

func NewXlsxReader 

func NewXlsxReader(ctx *Context) *XlsxReader

func (*XlsxReader) Read 

func (r *XlsxReader) Read() DataFrame

func (*XlsxReader) SetGuessDataTypeLen 

func (r *XlsxReader) SetGuessDataTypeLen(guessDataTypeLen int) *XlsxReader

func (*XlsxReader) SetHeader 

func (r *XlsxReader) SetHeader(header int) *XlsxReader

func (*XlsxReader) SetNullValues 

func (r *XlsxReader) SetNullValues(nullValues bool) *XlsxReader

func (*XlsxReader) SetPath 

func (r *XlsxReader) SetPath(path string) *XlsxReader

func (*XlsxReader) SetRows 

func (r *XlsxReader) SetRows(rows int) *XlsxReader

func (*XlsxReader) SetSchema 

func (r *XlsxReader) SetSchema(schema *preludiometa.Schema) *XlsxReader

func (*XlsxReader) SetSheet 

func (r *XlsxReader) SetSheet(sheet string) *XlsxReader

type XlsxWriter 

type XlsxWriter struct {
	// contains filtered or unexported fields
}

func NewXlsxWriter 

func NewXlsxWriter() *XlsxWriter

func (*XlsxWriter) SetDataFrame 

func (w *XlsxWriter) SetDataFrame(dataframe DataFrame) *XlsxWriter

func (*XlsxWriter) SetNaText 

func (w *XlsxWriter) SetNaText(naText string) *XlsxWriter

func (*XlsxWriter) SetPath 

func (w *XlsxWriter) SetPath(path string) *XlsxWriter

func (*XlsxWriter) SetSheet 

func (w *XlsxWriter) SetSheet(sheet string) *XlsxWriter

func (*XlsxWriter) SetWriter 

func (w *XlsxWriter) SetWriter(writer io.Writer) *XlsxWriter

func (*XlsxWriter) Write 

func (w *XlsxWriter) Write() DataFrame

type XptReader 

type XptReader struct {
	// contains filtered or unexported fields
}

func NewXptReader 

func NewXptReader(ctx *Context) *XptReader

func (*XptReader) Read 

func (r *XptReader) Read() DataFrame

func (*XptReader) SetByteOrder 

func (r *XptReader) SetByteOrder(byteOrder binary.ByteOrder) *XptReader

func (*XptReader) SetMaxObservations 

func (r *XptReader) SetMaxObservations(maxObservations int) *XptReader

func (*XptReader) SetPath 

func (r *XptReader) SetPath(path string) *XptReader

func (*XptReader) SetReader 

func (r *XptReader) SetReader(reader io.Reader) *XptReader

func (*XptReader) SetVersion 

func (r *XptReader) SetVersion(version XptVersionType) *XptReader

type XptVersionType 

type XptVersionType uint8
const (
	XPT_VERSION_5 XptVersionType = iota + 5
	XPT_VERSION_6
	XPT_VERSION_8 XptVersionType = iota + 6
	XPT_VERSION_9
)

type XptWriter 

type XptWriter struct {
	// contains filtered or unexported fields
}

func NewXptWriter 

func NewXptWriter() *XptWriter

func (*XptWriter) SetByteOrder 

func (w *XptWriter) SetByteOrder(byteOrder binary.ByteOrder) *XptWriter

func (*XptWriter) SetDataFrame 

func (w *XptWriter) SetDataFrame(dataframe DataFrame) *XptWriter

func (*XptWriter) SetPath 

func (w *XptWriter) SetPath(path string) *XptWriter

func (*XptWriter) SetVersion 

func (w *XptWriter) SetVersion(version XptVersionType) *XptWriter

func (*XptWriter) SetWriter 

func (w *XptWriter) SetWriter(writer io.Writer) *XptWriter

func (*XptWriter) Write 

func (w *XptWriter) Write() DataFrame

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