dsp

package

v0.11.0 Latest Latest Go to latest Published: Jul 25, 2023 License: Apache-2.0, BSD-2-Clause Imports: 23 Imported by: 0

Details

Valid go.mod file

The Go module system was introduced in Go 1.11 and is the official dependency management solution for Go.
Redistributable license

Redistributable licenses place minimal restrictions on how software can be used, modified, and redistributed.
Tagged version

Modules with tagged versions give importers more predictable builds.
Stable version

When a project reaches major version v1 it is considered stable.
Learn more about best practices

Repository

github.com/gocrane/crane

Links

Open Source Insights

Documentation ¶

Index ¶

Variables
func AutoCorrelation(samples []float64) []float64
func Debug(predictor prediction.Interface, namer metricnaming.MetricNamer, ...) (*Signal, *Signal, *Signal, error)
func NewPrediction(realtimeProvider providers.RealTime, historyProvider providers.History, ...) prediction.Interface
type Estimator
- func NewFFTEstimator(minNumOfSpectrumItems, maxNumOfSpectrumItems int, ...) Estimator
- func NewMaxValueEstimator(marginFraction float64) Estimator
type Signal
- func SamplesToSignal(samples []common.Sample, sampleInterval time.Duration) *Signal

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	Hour = time.Hour
	Day  = time.Hour * 24
	Week = Day * 7
)

View Source

var (
	// MaxAutoCorrelationPeakSearchIntervalSeconds is the maximum search interval for validating if
	// a periodicity hint is a peak of the ACF.
	MaxAutoCorrelationPeakSearchIntervalSeconds = (time.Hour * 4).Seconds()
)

Functions ¶

func AutoCorrelation ¶ added in v0.6.0

func AutoCorrelation(samples []float64) []float64

func Debug ¶ added in v0.6.0

func Debug(predictor prediction.Interface, namer metricnaming.MetricNamer, config *config.Config) (*Signal, *Signal, *Signal, error)

func NewPrediction ¶

func NewPrediction(realtimeProvider providers.RealTime, historyProvider providers.History, mc config.AlgorithmModelConfig) prediction.Interface

Types ¶

type Estimator ¶

type Estimator interface {
	GetEstimation(signal *Signal, periodLength time.Duration) *Signal
	String() string
}

func NewFFTEstimator ¶

func NewFFTEstimator(minNumOfSpectrumItems, maxNumOfSpectrumItems int, highFrequencyThreshold, lowAmplitudeThreshold, marginFraction float64) Estimator

func NewMaxValueEstimator ¶

func NewMaxValueEstimator(marginFraction float64) Estimator

type Signal ¶

type Signal struct {
	// SampleRate is the sampling rate in hertz
	SampleRate float64
	// Samples store all samples
	Samples []float64
}

Signal represents a discrete signal.

func SamplesToSignal ¶

func SamplesToSignal(samples []common.Sample, sampleInterval time.Duration) *Signal

func (*Signal) Denormalize ¶

func (s *Signal) Denormalize(min, max float64) (*Signal, error)

Denormalize denormalizes the signal between min and max.

func (*Signal) Duration ¶

func (s *Signal) Duration() float64

Duration returns the signal duration in seconds.

func (*Signal) Filter ¶

func (s *Signal) Filter(threshold float64) *Signal

Filter filters out frequency components whose amplitudes are less than the threshold and returns a new signal

func (*Signal) FindPeriod ¶ added in v0.6.0

func (s *Signal) FindPeriod() time.Duration

func (*Signal) Max ¶

func (s *Signal) Max() float64

Max returns the maximum sample value.

func (*Signal) Min ¶

func (s *Signal) Min() float64

Min returns the minimum sample value.

func (*Signal) Normalize ¶

func (s *Signal) Normalize() (*Signal, error)

Normalize normalizes the signal between -1 and 1 and return a new signal instance.

func (*Signal) Num ¶

func (s *Signal) Num() int

Num returns the number of samples in the signal.

func (*Signal) Plot ¶

func (s *Signal) Plot(color string, o ...charts.GlobalOpts) *charts.Line

func (*Signal) String ¶

func (s *Signal) String() string

func (*Signal) Truncate ¶

func (s *Signal) Truncate(d time.Duration) (*Signal, int)

Truncate truncates the signal to a length of multiple of d.

Source Files ¶

View all Source files

?	: This menu
/	: Search site
f or F	: Jump to
y or Y	: Canonical URL