scale

package

v0.0.0-...-7b712e5 Latest Latest Go to latest Published: Mar 3, 2023 License: BSD-3-Clause Imports: 1 Imported by: 0

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type Interface interface {
	Of(x float64) float64
	Ticks(n int) (major, minor []float64)
}

A scale satisfies Interface if it maps from some input range to an output interval [0, 1].

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

func NewLinear(input []float64) Linear

NewLinear returns a new linear scale.

func (s Linear) Of(x float64) float64

func (s Linear) Ticks(n int) (major, minor []float64)

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

func NewLog(input []float64, base float64) *Log

NewLog returns a new logarithmic scale.

base has no effect on the scaling. It is only used for computing tick marks.

func (s *Log) Nice(n int)

Nice expands the domain of s to "nice" values of the scale, which will translate into major tick marks.

n is the maximum number of major ticks. n must be >= 2.

func (s *Log) Of(x float64) float64

func (s *Log) Ticks(n int) (major, minor []float64)

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

func NewOutputScale(min, max float64) OutputScale

func (s *OutputScale) Clamp()

func (s *OutputScale) Crop()

func (s OutputScale) Of(x float64) (float64, bool)

func (s *OutputScale) Unclamp()

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

func NewPower(input []float64, exp float64) Power

NewPower returns a new power scale.

func (s Power) Of(x float64) float64

func (s Power) Ticks(n int) (major, minor []float64)