func AbsInt(valueint)int

func CirclePoint(cx, cyint, radius, thetaRadiansfloat64) (x, yint)

func DegreesAdd(baseDegrees, deltaDegreesfloat64)float64

func DegreesToRadians(degreesfloat64)float64

func ExponentialValueFormatter(v interface{})string

func FloatValueFormatter(v interface{})string

func FloatValueFormatterWithFormat(v interface{}, floatFormatstring)string

func GetAlternateColor(indexint)drawing.Color

func GetDefaultColor(indexint)drawing.Color

func GetDefaultFont() *truetype.Font

func GetFont(fontFamilystring) *truetype.Font

func GetRoundToForDelta(deltafloat64)float64

func InstallFont(fontFamilystring, data []byte)error

func Jet(v, vmin, vmaxfloat64)drawing.Color

func LinearRange(start, endfloat64) []float64

func LinearRangeWithStep(start, end, stepfloat64) []float64

func MaxInt(values ...int)int

func MeanFloat64(values ...float64)float64

func MeanInt(values ...int)int

func MinInt(values ...int)int

func MinMax(values ...float64) (min, maxfloat64)

func Normalize(values ...float64) []float64

func PercentDifference(v1, v2float64)float64

func PercentToRadians(pctfloat64)float64

func PercentValueFormatter(v interface{})string

func RadianAdd(base, deltafloat64)float64

func RadiansToDegrees(valuefloat64)float64

func RandomValues(countint) []float64

func RandomValuesWithMax(countint, maxfloat64) []float64

func RotateCoordinate(cx, cy, x, yint, thetaRadiansfloat64) (rx, ryint)

func RoundDown(value, roundTofloat64)float64

func RoundPlaces(inputfloat64, placesint) (roundedfloat64)

func RoundUp(value, roundTofloat64)float64

func SVGWithCSS(cssstring, noncestring) func(width, heightint)Renderer

func SetDefaultFont(fontFamilystring)error

func SumFloat64(values ...float64)float64

func SumInt(values ...int)int

func TimeDateValueFormatter(v interface{})string

func TimeFromFloat64(tffloat64)time.Time

func TimeHourValueFormatter(v interface{})string

func TimeMinuteValueFormatter(v interface{})string

func TimeToFloat64(ttime.Time)float64

func TimeValueFormatter(v interface{})string

func ToFloat64(ttime.Time)float64

func Viridis(v, vmin, vmaxfloat64)drawing.Color

type AnnotationSeries struct {NamestringStyleStyleYAxisYAxisTypeAnnotations []Value2}

funcFirstValueAnnotation¶

func FirstValueAnnotation(innerSeriesValuesProvider, vfs ...ValueFormatter)AnnotationSeries

FirstValueAnnotation returns an annotation series of just the first value of a value provider as an annotation.

funcLastValueAnnotationSeries¶

func LastValueAnnotationSeries(innerSeriesValuesProvider, vfs ...ValueFormatter)AnnotationSeries

LastValueAnnotationSeries returns an annotation series of just the last value of a value provider.

func (AnnotationSeries)GetName¶

func (asAnnotationSeries) GetName()string

GetName returns the name of the time series.

func (AnnotationSeries)GetStyle¶

func (asAnnotationSeries) GetStyle()Style

GetStyle returns the line style.

func (AnnotationSeries)GetYAxis¶

func (asAnnotationSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (AnnotationSeries)Measure¶

func (asAnnotationSeries) Measure(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)Box

Measure returns a bounds box of the series.

func (AnnotationSeries)Render¶

func (asAnnotationSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render draws the series.

func (AnnotationSeries)Validate¶

func (asAnnotationSeries) Validate()error

Validate validates the series.

type Array []float64

funcNewArray¶

func NewArray(values ...float64)Array

NewArray returns a new array from a given set of values.Array implements Sequence, which allows it to be used with the sequence helpers.

func (Array)GetValue¶

func (aArray) GetValue(indexint)float64

GetValue returns the value at a given index.

func (Array)Len¶

func (aArray) Len()int

Len returns the value provider length.

type Axis interface {GetName()stringSetName(namestring)GetStyle()StyleSetStyle(styleStyle)GetTicks() []TickGenerateTicks(rRenderer, raRange, vfValueFormatter) []Tick// GetGridLines returns the gridlines for the axis.GetGridLines(ticks []Tick) []GridLine// Measure should return an absolute box for the axis.// This is used when auto-fitting the canvas to the background.Measure(rRenderer, canvasBoxBox, raRange, styleStyle, ticks []Tick)Box// Render renders the axis.Render(rRenderer, canvasBoxBox, raRange, styleStyle, ticks []Tick)}

type BarChart struct {TitlestringTitleStyleStyleColorPaletteColorPaletteWidthintHeightintDPIfloat64BarWidthintBackgroundStyleCanvasStyleXAxisStyleYAxisYAxisBarSpacingintUseBaseValueboolBaseValuefloat64Font *truetype.FontBars     []ValueElements []Renderable}

func (BarChart)GetBarSpacing¶

func (bcBarChart) GetBarSpacing()int

GetBarSpacing returns the spacing between bars.

func (BarChart)GetBarWidth¶

func (bcBarChart) GetBarWidth()int

GetBarWidth returns the default bar width.

func (BarChart)GetColorPalette¶

func (bcBarChart) GetColorPalette()ColorPalette

GetColorPalette returns the color palette for the chart.

func (BarChart)GetDPI¶

func (bcBarChart) GetDPI()float64

GetDPI returns the dpi for the chart.

func (BarChart)GetFont¶

func (bcBarChart) GetFont() *truetype.Font

GetFont returns the text font.

func (BarChart)GetHeight¶

func (bcBarChart) GetHeight()int

GetHeight returns the chart height or the default value.

func (BarChart)GetWidth¶

func (bcBarChart) GetWidth()int

GetWidth returns the chart width or the default value.

func (BarChart)Render¶

func (bcBarChart) Render(rpRendererProvider, wio.Writer)error

Render renders the chart with the given renderer to the given io.Writer.

type BollingerBandsSeries struct {NamestringStyleStyleYAxisYAxisTypePeriodintKfloat64InnerSeriesValuesProvider// contains filtered or unexported fields}

func (*BollingerBandsSeries)GetBoundedLastValues¶

func (bbs *BollingerBandsSeries) GetBoundedLastValues() (x, y1, y2float64)

GetBoundedLastValues returns the last bounded value for the series.

func (*BollingerBandsSeries)GetBoundedValues¶

func (bbs *BollingerBandsSeries) GetBoundedValues(indexint) (x, y1, y2float64)

GetBoundedValues gets the bounded value for the series.

func (*BollingerBandsSeries)GetK¶

func (bbs *BollingerBandsSeries) GetK(defaults ...float64)float64

GetK returns the K value, or the number of standard deviations above and belowto band the simple moving average with.Typical K value is 2.0.

func (*BollingerBandsSeries)GetName¶

func (bbs *BollingerBandsSeries) GetName()string

GetName returns the name of the time series.

func (*BollingerBandsSeries)GetPeriod¶

func (bbs *BollingerBandsSeries) GetPeriod()int

GetPeriod returns the window size.

func (*BollingerBandsSeries)GetStyle¶

func (bbs *BollingerBandsSeries) GetStyle()Style

GetStyle returns the line style.

func (*BollingerBandsSeries)GetYAxis¶

func (bbs *BollingerBandsSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*BollingerBandsSeries)Len¶

func (bbs *BollingerBandsSeries) Len()int

Len returns the number of elements in the series.

func (*BollingerBandsSeries)Render¶

func (bbs *BollingerBandsSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*BollingerBandsSeries)Validate¶

func (bbs *BollingerBandsSeries) Validate()error

Validate validates the series.

type BoundedLastValuesProvider interface {GetBoundedLastValues() (x, y1, y2float64)}

type BoundedValuesProvider interface {Len()intGetBoundedValues(indexint) (x, y1, y2float64)}

type Box struct {TopintBottomintLeftintRightintIsSetbool}

funcNewBox¶

func NewBox(top, left, right, bottomint)Box

NewBox returns a new (set) box.

func (Box)Aspect¶

func (bBox) Aspect()float64

Aspect returns the aspect ratio of the box.

func (Box)Center¶

func (bBox) Center() (x, yint)

Center returns the center of the box.

func (Box)CenterX¶added inv0.5.6

func (bBox) CenterX()int

CenterX returns the center x position of the box.

func (Box)CenterY¶added inv0.5.6

func (bBox) CenterY()int

CenterY returns the center y position of the box.

func (Box)Clone¶

func (bBox) Clone()Box

Clone returns a new copy of the box.

func (Box)Constrain¶

func (bBox) Constrain(otherBox)Box

Constrain is similar to `Fit` except that it will workmore literally like the opposite of grow.

func (Box)Corners¶

func (bBox) Corners()BoxCorners

Corners returns the box as a set of corners.

func (Box)Equals¶

func (bBox) Equals(otherBox)bool

Equals returns if the box equals another box.

func (Box)Fit¶

func (bBox) Fit(otherBox)Box

Fit is functionally the inverse of grow.Fit maintains the original aspect ratio of the `other` box,but constrains it to the bounds of the target box.

func (Box)GetBottom¶

func (bBox) GetBottom(defaults ...int)int

GetBottom returns a coalesced value with a default.

func (Box)GetLeft¶

func (bBox) GetLeft(defaults ...int)int

GetLeft returns a coalesced value with a default.

func (Box)GetRight¶

func (bBox) GetRight(defaults ...int)int

GetRight returns a coalesced value with a default.

func (Box)GetTop¶

func (bBox) GetTop(defaults ...int)int

GetTop returns a coalesced value with a default.

func (Box)Grow¶

func (bBox) Grow(otherBox)Box

Grow grows a box based on another box.

func (Box)Height¶

func (bBox) Height()int

Height returns the height

func (Box)IsBiggerThan¶

func (bBox) IsBiggerThan(otherBox)bool

IsBiggerThan returns true if a box is bigger than another box.

func (Box)IsSmallerThan¶

func (bBox) IsSmallerThan(otherBox)bool

IsSmallerThan returns true if a box is smaller than another box.

func (Box)IsZero¶

func (bBox) IsZero()bool

IsZero returns if the box is set or not.

func (Box)OuterConstrain¶

func (bBox) OuterConstrain(bounds, otherBox)Box

OuterConstrain is similar to `Constraint` with the differencethat it applies corrections

func (Box)Overlaps¶added inv0.3.4

func (bBox) Overlaps(otherBox)bool

Overlaps returns true if the two boxes overlap each other.

func (Box)Shift¶

func (bBox) Shift(x, yint)Box

Shift pushes a box by x,y.

func (Box)String¶

func (bBox) String()string

String returns a string representation of the box.

func (Box)Validate¶

func (bBox) Validate()error

func (Box)Width¶

func (bBox) Width()int

Width returns the width

func (Box)WithBottom¶added inv0.3.0

func (bBox) WithBottom(valint)Box

func (Box)WithLeft¶added inv0.3.0

func (bBox) WithLeft(valint)Box

func (Box)WithRight¶added inv0.3.0

func (bBox) WithRight(valint)Box

func (Box)WithTop¶added inv0.3.0

func (bBox) WithTop(valint)Box

type BoxCorners struct {TopLeft, TopRight, BottomRight, BottomLeftPoint}

func (BoxCorners)Box¶

func (bcBoxCorners) Box()Box

Box return the BoxCorners as a regular box.

func (BoxCorners)Center¶

func (bcBoxCorners) Center() (x, yint)

Center returns the center of the box

func (BoxCorners)Equals¶

func (bcBoxCorners) Equals(otherBoxCorners)bool

Equals returns if the box equals another box.

func (BoxCorners)Height¶

func (bcBoxCorners) Height()int

Height returns the height

func (BoxCorners)Rotate¶

func (bcBoxCorners) Rotate(thetaDegreesfloat64)BoxCorners

Rotate rotates the box.

func (BoxCorners)String¶

func (bcBoxCorners) String()string

func (BoxCorners)ToPoints¶added inv0.5.6

func (bcBoxCorners) ToPoints() []Point

ToPoints returns the corner points as a slice of Points.

func (BoxCorners)Width¶

func (bcBoxCorners) Width()int

Width returns the width

type Chart struct {TitlestringTitleStyleStyleColorPaletteColorPaletteWidthintHeightintDPIfloat64BackgroundStyleCanvasStyleXAxisXAxisYAxisYAxisYAxisSecondaryYAxisFont *truetype.FontSeries   []SeriesElements []Renderable}

func (Chart)Box¶

func (cChart) Box()Box

Box returns the chart bounds as a box.

func (Chart)GetColorPalette¶

func (cChart) GetColorPalette()ColorPalette

GetColorPalette returns the color palette for the chart.

func (Chart)GetDPI¶

func (cChart) GetDPI(defaults ...float64)float64

GetDPI returns the dpi for the chart.

func (Chart)GetFont¶

func (cChart) GetFont() *truetype.Font

GetFont returns the text font.

func (Chart)GetHeight¶

func (cChart) GetHeight()int

GetHeight returns the chart height or the default value.

func (Chart)GetWidth¶

func (cChart) GetWidth()int

GetWidth returns the chart width or the default value.

func (Chart)Render¶

func (cChart) Render(rpRendererProvider, wio.Writer)error

Render renders the chart with the given renderer to the given io.Writer.

type ColorPalette interface {BackgroundColor()drawing.ColorBackgroundStrokeColor()drawing.ColorCanvasColor()drawing.ColorCanvasStrokeColor()drawing.ColorAxisStrokeColor()drawing.ColorTextColor()drawing.ColorGetSeriesColor(indexint)drawing.Color}

type ColorProvider func(v, vmin, vmaxfloat64)drawing.Color

type ConcatSeries []Series

func (ConcatSeries)GetValue¶

func (csConcatSeries) GetValue(indexint) (x, yfloat64)

GetValue returns the value at the (meta) index (i.e 0 => totalLen-1)

func (ConcatSeries)Len¶

func (csConcatSeries) Len()int

Len returns the length of the concatenated set of series.

func (ConcatSeries)Validate¶

func (csConcatSeries) Validate()error

Validate validates the series.

type ContinuousRange struct {Minfloat64Maxfloat64DomainintDescendingbool}

func (*ContinuousRange)GetDelta¶

func (r *ContinuousRange) GetDelta()float64

GetDelta returns the difference between the min and max value.

func (*ContinuousRange)GetDomain¶

func (r *ContinuousRange) GetDomain()int

GetDomain returns the range domain.

func (*ContinuousRange)GetMax¶

func (r *ContinuousRange) GetMax()float64

GetMax returns the max value for the continuous range.

func (*ContinuousRange)GetMin¶

func (r *ContinuousRange) GetMin()float64

GetMin gets the min value for the continuous range.

func (*ContinuousRange)IsDescending¶

func (r *ContinuousRange) IsDescending()bool

IsDescending returns if the range is descending.

func (*ContinuousRange)IsZero¶

func (r *ContinuousRange) IsZero()bool

IsZero returns if the ContinuousRange has been set or not.

func (*ContinuousRange)SetDomain¶

func (r *ContinuousRange) SetDomain(domainint)

SetDomain sets the range domain.

func (*ContinuousRange)SetMax¶

func (r *ContinuousRange) SetMax(maxfloat64)

SetMax sets the max value for the continuous range.

func (*ContinuousRange)SetMin¶

func (r *ContinuousRange) SetMin(minfloat64)

SetMin sets the min value for the continuous range.

func (*ContinuousRange)String¶

func (r *ContinuousRange) String()string

String returns a simple string for the ContinuousRange.

func (*ContinuousRange)Translate¶

func (r *ContinuousRange) Translate(valuefloat64)int

Translate maps a given value into the ContinuousRange space.

type ContinuousSeries struct {NamestringStyleStyleYAxisYAxisTypeXValueFormatterValueFormatterYValueFormatterValueFormatterXValues []float64YValues []float64}

func (ContinuousSeries)GetFirstValues¶

func (csContinuousSeries) GetFirstValues() (float64,float64)

GetFirstValues gets the first x,y values.

func (ContinuousSeries)GetLastValues¶

func (csContinuousSeries) GetLastValues() (float64,float64)

GetLastValues gets the last x,y values.

func (ContinuousSeries)GetName¶

func (csContinuousSeries) GetName()string

GetName returns the name of the time series.

func (ContinuousSeries)GetStyle¶

func (csContinuousSeries) GetStyle()Style

GetStyle returns the line style.

func (ContinuousSeries)GetValueFormatters¶

func (csContinuousSeries) GetValueFormatters() (x, yValueFormatter)

GetValueFormatters returns value formatter defaults for the series.

func (ContinuousSeries)GetValues¶

func (csContinuousSeries) GetValues(indexint) (float64,float64)

GetValues gets the x,y values at a given index.

func (ContinuousSeries)GetYAxis¶

func (csContinuousSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (ContinuousSeries)Len¶

func (csContinuousSeries) Len()int

Len returns the number of elements in the series.

func (ContinuousSeries)Render¶

func (csContinuousSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (ContinuousSeries)Validate¶

func (csContinuousSeries) Validate()error

Validate validates the series.

type DonutChart struct {TitlestringTitleStyleStyleColorPaletteColorPaletteWidthintHeightintDPIfloat64BackgroundStyleCanvasStyleSliceStyleStyleFont *truetype.FontValues   []ValueElements []Renderable}

func (DonutChart)Box¶

func (pcDonutChart) Box()Box

Box returns the chart bounds as a box.

func (DonutChart)GetColorPalette¶

func (pcDonutChart) GetColorPalette()ColorPalette

GetColorPalette returns the color palette for the chart.

func (DonutChart)GetDPI¶

func (pcDonutChart) GetDPI(defaults ...float64)float64

GetDPI returns the dpi for the chart.

func (DonutChart)GetFont¶

func (pcDonutChart) GetFont() *truetype.Font

GetFont returns the text font.

func (DonutChart)GetHeight¶

func (pcDonutChart) GetHeight()int

GetHeight returns the chart height or the default value.

func (DonutChart)GetWidth¶

func (pcDonutChart) GetWidth()int

GetWidth returns the chart width or the default value.

func (DonutChart)Render¶

func (pcDonutChart) Render(rpRendererProvider, wio.Writer)error

Render renders the chart with the given renderer to the given io.Writer.

type DotColorProvider func(xrange, yrangeRange, indexint, x, yfloat64)drawing.Color

type EMASeries struct {NamestringStyleStyleYAxisYAxisTypePeriodintInnerSeriesValuesProvider// contains filtered or unexported fields}

func (*EMASeries)GetFirstValues¶

func (ema *EMASeries) GetFirstValues() (x, yfloat64)

GetFirstValues computes the first moving average value.

func (*EMASeries)GetLastValues¶

func (ema *EMASeries) GetLastValues() (x, yfloat64)

GetLastValues computes the last moving average value but walking back window size samples,and recomputing the last moving average chunk.

func (*EMASeries)GetName¶

func (ema *EMASeries) GetName()string

GetName returns the name of the time series.

func (*EMASeries)GetPeriod¶

func (ema *EMASeries) GetPeriod()int

GetPeriod returns the window size.

func (*EMASeries)GetSigma¶

func (ema *EMASeries) GetSigma()float64

GetSigma returns the smoothing factor for the series.

func (*EMASeries)GetStyle¶

func (ema *EMASeries) GetStyle()Style

GetStyle returns the line style.

func (*EMASeries)GetValues¶

func (ema *EMASeries) GetValues(indexint) (x, yfloat64)

GetValues gets a value at a given index.

func (*EMASeries)GetYAxis¶

func (ema *EMASeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*EMASeries)Len¶

func (ema *EMASeries) Len()int

Len returns the number of elements in the series.

func (*EMASeries)Render¶

func (ema *EMASeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*EMASeries)Validate¶

func (ema *EMASeries) Validate()error

Validate validates the series.

type FirstValuesProvider interface {GetFirstValues() (x, yfloat64)}

type FontStyle struct {FontSizefloat64FontColordrawing.ColorFont      *truetype.Font}

func (FontStyle)GetFont¶added inv0.2.0

func (sFontStyle) GetFont(defaults ...*truetype.Font) *truetype.Font

GetFont returns the font face.

func (FontStyle)GetFontColor¶added inv0.2.0

func (sFontStyle) GetFontColor(defaults ...drawing.Color)drawing.Color

GetFontColor gets the font size.

func (FontStyle)GetFontSize¶added inv0.2.0

func (sFontStyle) GetFontSize(defaults ...float64)float64

GetFontSize gets the font size.

func (FontStyle)IsZero¶added inv0.5.1

func (sFontStyle) IsZero()bool

IsZero returns if the font style is set or not.

func (FontStyle)WithColor¶added inv0.3.0

func (sFontStyle) WithColor(colordrawing.Color)FontStyle

func (FontStyle)WithFont¶added inv0.3.0

func (sFontStyle) WithFont(font *truetype.Font)FontStyle

func (FontStyle)WithSize¶added inv0.3.0

func (sFontStyle) WithSize(sizefloat64)FontStyle

func (FontStyle)WriteTextOptionsToRenderer¶added inv0.2.0

func (sFontStyle) WriteTextOptionsToRenderer(rRenderer)

WriteTextOptionsToRenderer passes just the text style options to a renderer.

type FullBoundedValuesProvider interface {BoundedValuesProviderBoundedLastValuesProvider}

type FullValuesProvider interface {ValuesProviderLastValuesProvider}

type GridLine struct {IsMinorboolStyleStyleValuefloat64}

funcGenerateGridLines¶

func GenerateGridLines(ticks []Tick, majorStyle, minorStyleStyle) []GridLine

GenerateGridLines generates grid lines.

func (GridLine)Major¶

func (glGridLine) Major()bool

Major returns if the gridline is a `major` line.

func (GridLine)Minor¶

func (glGridLine) Minor()bool

Minor returns if the gridline is a `minor` line.

func (GridLine)Render¶

func (glGridLine) Render(rRenderer, canvasBoxBox, raRange, isVerticalbool, defaultsStyle)

Render renders the gridline

type GridLineProvider interface {GetGridLines(ticks []Tick, isVerticalbool, majorStyle, minorStyleStyle) []GridLine}

type HistogramSeries struct {NamestringStyleStyleYAxisYAxisTypeInnerSeriesValuesProvider}

func (HistogramSeries)GetBoundedValues¶

func (hsHistogramSeries) GetBoundedValues(indexint) (x, y1, y2float64)

GetBoundedValues returns the bounded values used for drawing bars (for BoundedValuesProvider interface).

func (HistogramSeries)GetName¶

func (hsHistogramSeries) GetName()string

GetName returns the series name (for Series interface).

func (HistogramSeries)GetStyle¶

func (hsHistogramSeries) GetStyle()Style

GetStyle returns the style used for rendering (for Series interface).

func (HistogramSeries)GetValues¶

func (hsHistogramSeries) GetValues(indexint) (x, yfloat64)

GetValues proxies value access to the inner series (for ValuesProvider interface).

func (HistogramSeries)GetYAxis¶

func (hsHistogramSeries) GetYAxis()YAxisType

GetYAxis returns which yaxis the series is mapped to.

func (HistogramSeries)Len¶

func (hsHistogramSeries) Len()int

Len returns the number of values in the inner series (for BoundedValuesProvider interface).

func (HistogramSeries)Render¶

func (hsHistogramSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render draws the histogram series using the given renderer (for Series interface).

func (HistogramSeries)Validate¶

func (hsHistogramSeries) Validate()error

Validate validates the series.

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

func (*ImageWriter)Image¶

func (ir *ImageWriter) Image() (image.Image,error)

Image returns an *image.Image for the result.

func (*ImageWriter)SetRGBA¶

func (ir *ImageWriter) SetRGBA(i *image.RGBA)

SetRGBA sets a raw version of the image.

func (*ImageWriter)Write¶

func (ir *ImageWriter) Write(buffer []byte) (int,error)

type IsZeroable interface {IsZero()bool}

type LastValuesProvider interface {GetLastValues() (x, yfloat64)}

type LinearCoefficientProvider interface {Coefficients() (m, b, stdev, avgfloat64)}

type LinearCoefficientSet struct {Mfloat64Bfloat64StdDevfloat64Avgfloat64}

funcLinearCoefficients¶

func LinearCoefficients(m, bfloat64)LinearCoefficientSet

LinearCoefficients returns a fixed linear coefficient pair.

funcNormalizedLinearCoefficients¶

func NormalizedLinearCoefficients(m, b, stdev, avgfloat64)LinearCoefficientSet

NormalizedLinearCoefficients returns a fixed linear coefficient pair.

func (LinearCoefficientSet)Coefficients¶

func (lcsLinearCoefficientSet) Coefficients() (m, b, stdev, avgfloat64)

Coefficients returns the coefficients.

type LinearRegressionSeries struct {NamestringStyleStyleYAxisYAxisTypeLimitintOffsetintInnerSeriesValuesProvider// contains filtered or unexported fields}

func (*LinearRegressionSeries)Coefficients¶

func (lrs *LinearRegressionSeries) Coefficients() (m, b, stdev, avgfloat64)

Coefficients returns the linear coefficients for the series.

func (*LinearRegressionSeries)GetEndIndex¶

func (lrs *LinearRegressionSeries) GetEndIndex()int

GetEndIndex returns the effective limit end.

func (*LinearRegressionSeries)GetFirstValues¶

func (lrs *LinearRegressionSeries) GetFirstValues() (x, yfloat64)

GetFirstValues computes the first linear regression value.

func (*LinearRegressionSeries)GetLastValues¶

func (lrs *LinearRegressionSeries) GetLastValues() (x, yfloat64)

GetLastValues computes the last linear regression value.

func (*LinearRegressionSeries)GetLimit¶

func (lrs *LinearRegressionSeries) GetLimit()int

GetLimit returns the window size.

func (*LinearRegressionSeries)GetName¶

func (lrs *LinearRegressionSeries) GetName()string

GetName returns the name of the time series.

func (*LinearRegressionSeries)GetOffset¶

func (lrs *LinearRegressionSeries) GetOffset()int

GetOffset returns the data offset.

func (*LinearRegressionSeries)GetStyle¶

func (lrs *LinearRegressionSeries) GetStyle()Style

GetStyle returns the line style.

func (*LinearRegressionSeries)GetValues¶

func (lrs *LinearRegressionSeries) GetValues(indexint) (x, yfloat64)

GetValues gets a value at a given index.

func (*LinearRegressionSeries)GetYAxis¶

func (lrs *LinearRegressionSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*LinearRegressionSeries)IsZero¶

func (lrs *LinearRegressionSeries) IsZero()bool

IsZero returns if we've computed the coefficients or not.

func (*LinearRegressionSeries)Len¶

func (lrs *LinearRegressionSeries) Len()int

Len returns the number of elements in the series.

func (*LinearRegressionSeries)Render¶

func (lrs *LinearRegressionSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*LinearRegressionSeries)Validate¶

func (lrs *LinearRegressionSeries) Validate()error

Validate validates the series.

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

funcNewLinearSequence¶

func NewLinearSequence() *LinearSeq

NewLinearSequence returns a new linear generator.

func (*LinearSeq)End¶

func (lg *LinearSeq) End()float64

End returns the end value.

func (*LinearSeq)GetValue¶

func (lg *LinearSeq) GetValue(indexint)float64

GetValue returns the value at a given index.

func (*LinearSeq)Len¶

func (lg *LinearSeq) Len()int

Len returns the number of elements in the seq.

func (*LinearSeq)Start¶

func (lg *LinearSeq) Start()float64

Start returns the start value.

func (*LinearSeq)Step¶

func (lg *LinearSeq) Step()float64

Step returns the step value.

func (*LinearSeq)WithEnd¶

func (lg *LinearSeq) WithEnd(endfloat64) *LinearSeq

WithEnd sets the end and returns the linear generator.

func (*LinearSeq)WithStart¶

func (lg *LinearSeq) WithStart(startfloat64) *LinearSeq

WithStart sets the start and returns the linear generator.

func (*LinearSeq)WithStep¶

func (lg *LinearSeq) WithStep(stepfloat64) *LinearSeq

WithStep sets the step and returns the linear generator.

type LinearSeries struct {NamestringStyleStyleYAxisYAxisTypeXValues     []float64InnerSeriesLinearCoefficientProvider// contains filtered or unexported fields}

func (*LinearSeries)GetEndIndex¶

func (ls *LinearSeries) GetEndIndex()int

GetEndIndex returns the effective limit end.

func (*LinearSeries)GetFirstValues¶

func (ls *LinearSeries) GetFirstValues() (x, yfloat64)

GetFirstValues computes the first linear regression value.

func (*LinearSeries)GetLastValues¶

func (ls *LinearSeries) GetLastValues() (x, yfloat64)

GetLastValues computes the last linear regression value.

func (*LinearSeries)GetName¶

func (ls *LinearSeries) GetName()string

GetName returns the name of the time series.

func (*LinearSeries)GetStyle¶

func (ls *LinearSeries) GetStyle()Style

GetStyle returns the line style.

func (*LinearSeries)GetValues¶

func (ls *LinearSeries) GetValues(indexint) (x, yfloat64)

GetValues gets a value at a given index.

func (*LinearSeries)GetYAxis¶

func (ls *LinearSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*LinearSeries)IsZero¶

func (ls *LinearSeries) IsZero()bool

IsZero returns if the linear series has computed coefficients or not.

func (*LinearSeries)Len¶

func (ls *LinearSeries) Len()int

Len returns the number of elements in the series.

func (*LinearSeries)Render¶

func (ls *LinearSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*LinearSeries)Validate¶

func (ls *LinearSeries) Validate()error

Validate validates the series.

type LogarithmicRange struct {Minfloat64Maxfloat64DomainintDescendingbool}

func (*LogarithmicRange)GetDelta¶

func (r *LogarithmicRange) GetDelta()float64

GetDelta returns the difference between the min and max value.

func (*LogarithmicRange)GetDomain¶

func (r *LogarithmicRange) GetDomain()int

GetDomain returns the range domain.

func (*LogarithmicRange)GetMax¶

func (r *LogarithmicRange) GetMax()float64

GetMax returns the max value for the continuous range.

func (*LogarithmicRange)GetMin¶

func (r *LogarithmicRange) GetMin()float64

GetMin gets the min value for the continuous range.

func (*LogarithmicRange)GetTicks¶

func (r *LogarithmicRange) GetTicks(vfValueFormatter) []Tick

GetTicks calculates the needed ticks for the axis, in log scale. Only supports Y values > 0.

func (*LogarithmicRange)IsDescending¶

func (r *LogarithmicRange) IsDescending()bool

IsDescending returns if the range is descending.

func (*LogarithmicRange)IsZero¶

func (r *LogarithmicRange) IsZero()bool

IsZero returns if the LogarithmicRange has been set or not.

func (*LogarithmicRange)SetDomain¶

func (r *LogarithmicRange) SetDomain(domainint)

SetDomain sets the range domain.

func (*LogarithmicRange)SetMax¶

func (r *LogarithmicRange) SetMax(maxfloat64)

SetMax sets the max value for the continuous range.

func (*LogarithmicRange)SetMin¶

func (r *LogarithmicRange) SetMin(minfloat64)

SetMin sets the min value for the continuous range.

func (*LogarithmicRange)String¶

func (r *LogarithmicRange) String()string

String returns a simple string for the LogarithmicRange.

func (*LogarithmicRange)Translate¶

func (r *LogarithmicRange) Translate(valuefloat64)int

Translate maps a given value into the LogarithmicRange space. Modified version from ContinuousRange.

type MACDLineSeries struct {NamestringStyleStyleYAxisYAxisTypeInnerSeriesValuesProviderPrimaryPeriodintSecondaryPeriodintSigmafloat64// contains filtered or unexported fields}

func (*MACDLineSeries)GetName¶

func (macdl *MACDLineSeries) GetName()string

GetName returns the name of the time series.

func (*MACDLineSeries)GetPeriods¶

func (macdl *MACDLineSeries) GetPeriods() (w1, w2int)

GetPeriods returns the primary and secondary periods.

func (*MACDLineSeries)GetStyle¶

func (macdl *MACDLineSeries) GetStyle()Style

GetStyle returns the line style.

func (*MACDLineSeries)GetValues¶

func (macdl *MACDLineSeries) GetValues(indexint) (xfloat64, yfloat64)

GetValues gets a value at a given index. For MACD it is the signal value.

func (*MACDLineSeries)GetYAxis¶

func (macdl *MACDLineSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*MACDLineSeries)Len¶

func (macdl *MACDLineSeries) Len()int

Len returns the number of elements in the series.

func (*MACDLineSeries)Render¶

func (macdl *MACDLineSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*MACDLineSeries)Validate¶

func (macdl *MACDLineSeries) Validate()error

Validate validates the series.

type MACDSeries struct {NamestringStyleStyleYAxisYAxisTypeInnerSeriesValuesProviderPrimaryPeriodintSecondaryPeriodintSignalPeriodint// contains filtered or unexported fields}

func (*MACDSeries)GetName¶

func (macd *MACDSeries) GetName()string

GetName returns the name of the time series.

func (*MACDSeries)GetPeriods¶

func (macd *MACDSeries) GetPeriods() (w1, w2, sigint)

GetPeriods returns the primary and secondary periods.

func (*MACDSeries)GetStyle¶

func (macd *MACDSeries) GetStyle()Style

GetStyle returns the line style.

func (*MACDSeries)GetValues¶

func (macd *MACDSeries) GetValues(indexint) (xfloat64, yfloat64)

GetValues gets a value at a given index. For MACD it is the signal value.

func (*MACDSeries)GetYAxis¶

func (macd *MACDSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*MACDSeries)Len¶

func (macd *MACDSeries) Len()int

Len returns the number of elements in the series.

func (*MACDSeries)Validate¶

func (macd *MACDSeries) Validate()error

Validate validates the series.

type MACDSignalSeries struct {NamestringStyleStyleYAxisYAxisTypeInnerSeriesValuesProviderPrimaryPeriodintSecondaryPeriodintSignalPeriodint// contains filtered or unexported fields}

func (*MACDSignalSeries)GetName¶

func (macds *MACDSignalSeries) GetName()string

GetName returns the name of the time series.

func (*MACDSignalSeries)GetPeriods¶

func (macds *MACDSignalSeries) GetPeriods() (w1, w2, sigint)

GetPeriods returns the primary and secondary periods.

func (*MACDSignalSeries)GetStyle¶

func (macds *MACDSignalSeries) GetStyle()Style

GetStyle returns the line style.

func (*MACDSignalSeries)GetValues¶

func (macds *MACDSignalSeries) GetValues(indexint) (xfloat64, yfloat64)

GetValues gets a value at a given index. For MACD it is the signal value.

func (*MACDSignalSeries)GetYAxis¶

func (macds *MACDSignalSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*MACDSignalSeries)Len¶

func (macds *MACDSignalSeries) Len()int

Len returns the number of elements in the series.

func (*MACDSignalSeries)Render¶

func (macds *MACDSignalSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*MACDSignalSeries)Validate¶

func (macds *MACDSignalSeries) Validate()error

Validate validates the series.

type MaxSeries struct {NamestringStyleStyleYAxisYAxisTypeInnerSeriesValuesProvider// contains filtered or unexported fields}

func (*MaxSeries)GetName¶

func (ms *MaxSeries) GetName()string

GetName returns the name of the time series.

func (*MaxSeries)GetStyle¶

func (ms *MaxSeries) GetStyle()Style

GetStyle returns the line style.

func (*MaxSeries)GetValues¶

func (ms *MaxSeries) GetValues(indexint) (x, yfloat64)

GetValues gets a value at a given index.

func (*MaxSeries)GetYAxis¶

func (ms *MaxSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*MaxSeries)Len¶

func (ms *MaxSeries) Len()int

Len returns the number of elements in the series.

func (*MaxSeries)Render¶

func (ms *MaxSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*MaxSeries)Validate¶

func (ms *MaxSeries) Validate()error

Validate validates the series.

type MinSeries struct {NamestringStyleStyleYAxisYAxisTypeInnerSeriesValuesProvider// contains filtered or unexported fields}

func (*MinSeries)GetName¶

func (ms *MinSeries) GetName()string

GetName returns the name of the time series.

func (*MinSeries)GetStyle¶

func (ms *MinSeries) GetStyle()Style

GetStyle returns the line style.

func (*MinSeries)GetValues¶

func (ms *MinSeries) GetValues(indexint) (x, yfloat64)

GetValues gets a value at a given index.

func (*MinSeries)GetYAxis¶

func (ms *MinSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*MinSeries)Len¶

func (ms *MinSeries) Len()int

Len returns the number of elements in the series.

func (*MinSeries)Render¶

func (ms *MinSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*MinSeries)Validate¶

func (ms *MinSeries) Validate()error

Validate validates the series.

type NameProvider interface {GetName()string}

type PercentChangeSeries struct {NamestringStyleStyleYAxisYAxisTypeInnerSeriesPercentChangeSeriesSource}

func (PercentChangeSeries)GetFirstValues¶

func (pcsPercentChangeSeries) GetFirstValues() (x, yfloat64)

GetFirstValues returns the first x and y values of the inner series (for FirstValuesProvider interface).

func (PercentChangeSeries)GetLastValues¶

func (pcsPercentChangeSeries) GetLastValues() (x, yfloat64)

GetLastValues gets the last values.

func (PercentChangeSeries)GetName¶

func (pcsPercentChangeSeries) GetName()string

GetName returns the name of the time series.

func (PercentChangeSeries)GetStyle¶

func (pcsPercentChangeSeries) GetStyle()Style

GetStyle returns the line style.

func (PercentChangeSeries)GetValueFormatters¶

func (pcsPercentChangeSeries) GetValueFormatters() (x, yValueFormatter)

GetValueFormatters returns value formatter defaults for the series.

func (PercentChangeSeries)GetValues¶

func (pcsPercentChangeSeries) GetValues(indexint) (x, yfloat64)

GetValues gets x, y values at a given index.

func (PercentChangeSeries)GetYAxis¶

func (pcsPercentChangeSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (PercentChangeSeries)Len¶

func (pcsPercentChangeSeries) Len()int

Len returns the number of elements in the inner series (for Series interface).

func (PercentChangeSeries)Render¶

func (pcsPercentChangeSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (PercentChangeSeries)Validate¶

func (pcsPercentChangeSeries) Validate()error

Validate validates the series.

type PercentChangeSeriesSource interface {SeriesFirstValuesProviderLastValuesProviderValuesProviderValueFormatterProvider}

type PieChart struct {TitlestringTitleStyleStyleColorPaletteColorPaletteWidthintHeightintDPIfloat64BackgroundStyleCanvasStyleSliceStyleStyleFont *truetype.FontValues   []ValueElements []Renderable}

func (PieChart)Box¶

func (pcPieChart) Box()Box

Box returns the chart bounds as a box.

func (PieChart)GetColorPalette¶

func (pcPieChart) GetColorPalette()ColorPalette

GetColorPalette returns the color palette for the chart.

func (PieChart)GetDPI¶

func (pcPieChart) GetDPI(defaults ...float64)float64

GetDPI returns the dpi for the chart.

func (PieChart)GetFont¶

func (pcPieChart) GetFont() *truetype.Font

GetFont returns the text font.

func (PieChart)GetHeight¶

func (pcPieChart) GetHeight()int

GetHeight returns the chart height or the default value.

func (PieChart)GetWidth¶

func (pcPieChart) GetWidth()int

GetWidth returns the chart width or the default value.

func (PieChart)Render¶

func (pcPieChart) Render(rpRendererProvider, wio.Writer)error

Render renders the chart with the given renderer to the given io.Writer.

type Point struct {X, Yint}

func (Point)DistanceTo¶

func (pPoint) DistanceTo(otherPoint)float64

DistanceTo calculates the distance to another point.

func (Point)Equals¶

func (pPoint) Equals(otherPoint)bool

Equals returns if a point equals another point.

func (Point)String¶

func (pPoint) String()string

String returns a string representation of the point.

type PolynomialRegressionSeries struct {NamestringStyleStyleYAxisYAxisTypeLimitintOffsetintDegreeintInnerSeriesValuesProvider// contains filtered or unexported fields}

func (*PolynomialRegressionSeries)GetEndIndex¶

func (prs *PolynomialRegressionSeries) GetEndIndex()int

GetEndIndex returns the effective limit end.

func (*PolynomialRegressionSeries)GetFirstValues¶

func (prs *PolynomialRegressionSeries) GetFirstValues() (x, yfloat64)

GetFirstValues computes the first poly regression value.

func (*PolynomialRegressionSeries)GetLastValues¶

func (prs *PolynomialRegressionSeries) GetLastValues() (x, yfloat64)

GetLastValues computes the last poly regression value.

func (*PolynomialRegressionSeries)GetLimit¶

func (prs *PolynomialRegressionSeries) GetLimit()int

GetLimit returns the window size.

func (*PolynomialRegressionSeries)GetName¶

func (prs *PolynomialRegressionSeries) GetName()string

GetName returns the name of the time series.

func (*PolynomialRegressionSeries)GetOffset¶

func (prs *PolynomialRegressionSeries) GetOffset()int

GetOffset returns the data offset.

func (*PolynomialRegressionSeries)GetStyle¶

func (prs *PolynomialRegressionSeries) GetStyle()Style

GetStyle returns the line style.

func (*PolynomialRegressionSeries)GetValues¶

func (prs *PolynomialRegressionSeries) GetValues(indexint) (x, yfloat64)

GetValues returns the series value for a given index.

func (*PolynomialRegressionSeries)GetYAxis¶

func (prs *PolynomialRegressionSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (*PolynomialRegressionSeries)Len¶

func (prs *PolynomialRegressionSeries) Len()int

Len returns the number of elements in the series.

func (*PolynomialRegressionSeries)Render¶

func (prs *PolynomialRegressionSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (*PolynomialRegressionSeries)Validate¶

func (prs *PolynomialRegressionSeries) Validate()error

Validate validates the series.

type RGBACollector interface {SetRGBA(i *image.RGBA)}

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

funcNewRandomSequence¶

func NewRandomSequence() *RandomSeq

NewRandomSequence creates a new random seq.

func (*RandomSeq)GetValue¶

func (r *RandomSeq) GetValue(_int)float64

GetValue returns the value.

func (*RandomSeq)Len¶

func (r *RandomSeq) Len()int

Len returns the number of elements that will be generated.

func (*RandomSeq)Max¶

func (r *RandomSeq) Max() *float64

Max returns the maximum value.

func (*RandomSeq)Min¶

func (r *RandomSeq) Min() *float64

Min returns the minimum value.

func (*RandomSeq)WithLen¶

func (r *RandomSeq) WithLen(lengthint) *RandomSeq

WithLen sets a maximum len

func (*RandomSeq)WithMax¶

func (r *RandomSeq) WithMax(maxfloat64) *RandomSeq

WithMax sets the average and returns the Random.

func (*RandomSeq)WithMin¶

func (r *RandomSeq) WithMin(minfloat64) *RandomSeq

WithMin sets the scale and returns the Random.

type Range interface {StringableIsZeroableGetMin()float64SetMin(minfloat64)GetMax()float64SetMax(maxfloat64)GetDelta()float64GetDomain()intSetDomain(domainint)IsDescending()bool// Translate the range to the domain.Translate(valuefloat64)int}

type Renderable func(rRenderer, canvasBoxBox, defaultsStyle)

funcLegend¶

func Legend(c *Chart, userDefaults ...Style)Renderable

Legend returns a legend renderable function.

funcLegendLeft¶

func LegendLeft(c *Chart, userDefaults ...Style)Renderable

LegendLeft is a legend that is designed for longer series lists.

funcLegendThin¶

func LegendThin(c *Chart, userDefaults ...Style)Renderable

LegendThin is a legend that doesn't obscure the chart area.

type Renderer interface {// ResetStyle should reset any style related settings on the renderer.ResetStyle()// GetDPI gets the DPI for the renderer.GetDPI()float64// SetDPI sets the DPI for the renderer.SetDPI(dpifloat64)// SetClassName sets the current class name.SetClassName(string)// SetStrokeColor sets the current stroke color.SetStrokeColor(drawing.Color)// SetFillColor sets the current fill color.SetFillColor(drawing.Color)// SetStrokeWidth sets the stroke width.SetStrokeWidth(widthfloat64)// SetStrokeDashArray sets the stroke dash array.SetStrokeDashArray(dashArray []float64)// MoveTo moves the cursor to a given point.MoveTo(x, yint)// LineTo both starts a shape and draws a line to a given point// from the previous point.LineTo(x, yint)// QuadCurveTo draws a quad curve.// cx and cy represent the bezier "control points".QuadCurveTo(cx, cy, x, yint)// ArcTo draws an arc with a given center (cx,cy)// a given set of radii (rx,ry), a startAngle and delta (in radians).ArcTo(cx, cyint, rx, ry, startAngle, deltafloat64)// Close finalizes a shape as drawn by LineTo.Close()// Stroke strokes the path.Stroke()// Fill fills the path, but does not stroke.Fill()// FillStroke fills and strokes a path.FillStroke()// Circle draws a circle at the given coords with a given radius.Circle(radiusfloat64, x, yint)// SetFont sets a font for a text field.SetFont(*truetype.Font)// SetFontColor sets a font's colorSetFontColor(drawing.Color)// SetFontSize sets the font size for a text field.SetFontSize(sizefloat64)// Text draws a text blob.Text(bodystring, x, yint)// MeasureText measures text.MeasureText(bodystring)Box// SetTextRotation sets a rotation for drawing elements.SetTextRotation(radiansfloat64)// ClearTextRotation clears rotation.ClearTextRotation()// Save writes the image to the given writer.Save(wio.Writer)error}

funcJPG¶added inv0.5.1

func JPG(width, heightint)Renderer

JPG returns a new jpg raster renderer.

funcPNG¶

func PNG(width, heightint)Renderer

PNG returns a new png raster renderer.

funcSVG¶

func SVG(width, heightint)Renderer

SVG returns a new png/raster renderer.

type RendererProvider func(int,int)Renderer

type SMASeries struct {NamestringStyleStyleYAxisYAxisTypePeriodintInnerSeriesValuesProvider}

func (SMASeries)GetFirstValues¶

func (smaSMASeries) GetFirstValues() (x, yfloat64)

GetFirstValues computes the first moving average value.

func (SMASeries)GetLastValues¶

func (smaSMASeries) GetLastValues() (x, yfloat64)

GetLastValues computes the last moving average value but walking back window size samples,and recomputing the last moving average chunk.

func (SMASeries)GetName¶

func (smaSMASeries) GetName()string

GetName returns the name of the time series.

func (SMASeries)GetPeriod¶

func (smaSMASeries) GetPeriod(defaults ...int)int

GetPeriod returns the window size.

func (SMASeries)GetStyle¶

func (smaSMASeries) GetStyle()Style

GetStyle returns the line style.

func (SMASeries)GetValues¶

func (smaSMASeries) GetValues(indexint) (x, yfloat64)

GetValues gets a value at a given index.

func (SMASeries)GetYAxis¶

func (smaSMASeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (SMASeries)Len¶

func (smaSMASeries) Len()int

Len returns the number of elements in the series.

func (SMASeries)Render¶

func (smaSMASeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (SMASeries)Validate¶

func (smaSMASeries) Validate()error

Validate validates the series.

type Seq struct {Sequence}

funcValueSequence¶

func ValueSequence(values ...float64)Seq

ValueSequence returns a sequence for a given values set.

func (Seq)Average¶

func (sSeq) Average()float64

Average returns the float average of the values in the buffer.

func (Seq)Each¶

func (sSeq) Each(mapfn func(int,float64))

Each applies the `mapfn` to all values in the value provider.

func (Seq)FoldLeft¶

func (sSeq) FoldLeft(mapfn func(iint, v0, vfloat64)float64) (v0float64)

FoldLeft collapses a seq from left to right.

func (Seq)FoldRight¶

func (sSeq) FoldRight(mapfn func(iint, v0, vfloat64)float64) (v0float64)

FoldRight collapses a seq from right to left.

func (Seq)Map¶

func (sSeq) Map(mapfn func(iint, vfloat64)float64)Seq

Map applies the `mapfn` to all values in the value provider,returning a new seq.

func (Seq)Max¶

func (sSeq) Max()float64

Max returns the maximum value in the seq.

func (Seq)Median¶

func (sSeq) Median() (medianfloat64)

Median returns the median or middle value in the sorted seq.

func (Seq)Min¶

func (sSeq) Min()float64

Min returns the minimum value in the seq.

func (Seq)MinMax¶

func (sSeq) MinMax() (min, maxfloat64)

MinMax returns the minimum and the maximum in one pass.

func (Seq)Normalize¶

func (sSeq) Normalize()Seq

Normalize maps every value to the interval [0, 1.0].

func (Seq)Percentile¶

func (sSeq) Percentile(percentfloat64) (percentilefloat64)

Percentile finds the relative standing in a slice of floats.`percent` should be given on the interval [0,1.0).

func (Seq)Reverse¶

func (sSeq) Reverse()Seq

Reverse reverses the sequence

func (Seq)Sort¶

func (sSeq) Sort()Seq

Sort returns the seq sorted in ascending order.This fully enumerates the seq.

func (Seq)StdDev¶

func (sSeq) StdDev()float64

StdDev returns the standard deviation.

func (Seq)Sum¶

func (sSeq) Sum() (accumfloat64)

Sum adds all the elements of a series together.

func (Seq)Values¶

func (sSeq) Values() (output []float64)

Values enumerates the seq into a slice.

func (Seq)Variance¶

func (sSeq) Variance()float64

Variance computes the variance of the buffer.

type Sequence interface {Len()intGetValue(int)float64}

type Series interface {GetName()stringGetYAxis()YAxisTypeGetStyle()StyleValidate()errorRender(rRenderer, canvasBoxBox, xrange, yrangeRange, sStyle)}

type SizeProvider func(xrange, yrangeRange, indexint, x, yfloat64)float64

type StackedBar struct {NamestringWidthintValues []Value}

func (StackedBar)GetWidth¶

func (sbStackedBar) GetWidth()int

GetWidth returns the width of the bar.

type StackedBarChart struct {TitlestringTitleStyleStyleColorPaletteColorPaletteWidthintHeightintDPIfloat64BackgroundStyleCanvasStyleXAxisStyleYAxisStyleBarSpacingintFont *truetype.FontIsHorizontalboolBars     []StackedBarElements []Renderable}

func (StackedBarChart)Box¶

func (sbcStackedBarChart) Box()Box

Box returns the chart bounds as a box.

func (StackedBarChart)GetBarSpacing¶

func (sbcStackedBarChart) GetBarSpacing()int

GetBarSpacing returns the spacing between bars.

func (StackedBarChart)GetColorPalette¶

func (sbcStackedBarChart) GetColorPalette()ColorPalette

GetColorPalette returns the color palette for the chart.

func (StackedBarChart)GetDPI¶

func (sbcStackedBarChart) GetDPI(defaults ...float64)float64

GetDPI returns the dpi for the chart.

func (StackedBarChart)GetFont¶

func (sbcStackedBarChart) GetFont() *truetype.Font

GetFont returns the text font.

func (StackedBarChart)GetHeight¶

func (sbcStackedBarChart) GetHeight()int

GetHeight returns the chart height or the default value.

func (StackedBarChart)GetWidth¶

func (sbcStackedBarChart) GetWidth()int

GetWidth returns the chart width or the default value.

func (StackedBarChart)Render¶

func (sbcStackedBarChart) Render(rpRendererProvider, wio.Writer)error

Render renders the chart with the given renderer to the given io.Writer.

type Stringable interface {String()string}

type Style struct {FontStyleHiddenboolPaddingBoxClassNamestringStrokeWidthfloat64StrokeColordrawing.ColorStrokeDashArray []float64DotColordrawing.ColorDotWidthfloat64DotWidthProviderSizeProviderDotColorProviderDotColorProviderFillColordrawing.ColorTextHorizontalAlignTextHorizontalAlignTextVerticalAlignTextVerticalAlignTextWrapTextWrapTextLineSpacingintTextRotationDegreesfloat64//0 is unset or normal}

funcHidden¶

func Hidden()Style

Hidden is a prebuilt style with the `Hidden` property set to true.

funcShown¶

func Shown()Style

Shown is a prebuilt style with the `Hidden` property set to false.You can also think of this as the default.

funcStyleTextDefaults¶

func StyleTextDefaults()Style

StyleTextDefaults returns a style for drawing outside a chart context.

func (Style)GetClassName¶

func (sStyle) GetClassName(defaults ...string)string

GetClassName returns the class name or a default.

func (Style)GetDotColor¶

func (sStyle) GetDotColor(defaults ...drawing.Color)drawing.Color

GetDotColor returns the stroke color.

func (Style)GetDotOptions¶

func (sStyle) GetDotOptions()Style

GetDotOptions returns the dot components.

func (Style)GetDotWidth¶

func (sStyle) GetDotWidth(defaults ...float64)float64

GetDotWidth returns the dot width for scatter plots.

func (Style)GetFillAndStrokeOptions¶

func (sStyle) GetFillAndStrokeOptions()Style

GetFillAndStrokeOptions returns the fill and stroke components.

func (Style)GetFillColor¶

func (sStyle) GetFillColor(defaults ...drawing.Color)drawing.Color

GetFillColor returns the fill color.

func (Style)GetFillOptions¶

func (sStyle) GetFillOptions()Style

GetFillOptions returns the fill components.

func (Style)GetPadding¶

func (sStyle) GetPadding(defaults ...Box)Box

GetPadding returns the padding.

func (Style)GetStrokeColor¶

func (sStyle) GetStrokeColor(defaults ...drawing.Color)drawing.Color

GetStrokeColor returns the stroke color.

func (Style)GetStrokeDashArray¶

func (sStyle) GetStrokeDashArray(defaults ...[]float64) []float64

GetStrokeDashArray returns the stroke dash array.

func (Style)GetStrokeOptions¶

func (sStyle) GetStrokeOptions()Style

GetStrokeOptions returns the stroke components.

func (Style)GetStrokeWidth¶

func (sStyle) GetStrokeWidth(defaults ...float64)float64

GetStrokeWidth returns the stroke width.

func (Style)GetTextHorizontalAlign¶

func (sStyle) GetTextHorizontalAlign(defaults ...TextHorizontalAlign)TextHorizontalAlign

GetTextHorizontalAlign returns the horizontal alignment.

func (Style)GetTextLineSpacing¶

func (sStyle) GetTextLineSpacing(defaults ...int)int

GetTextLineSpacing returns the spacing in pixels between lines of text (vertically).

func (Style)GetTextOptions¶

func (sStyle) GetTextOptions()Style

GetTextOptions returns just the text components of the style.

func (Style)GetTextRotationDegrees¶

func (sStyle) GetTextRotationDegrees(defaults ...float64)float64

GetTextRotationDegrees returns the text rotation in degrees.

func (Style)GetTextVerticalAlign¶

func (sStyle) GetTextVerticalAlign(defaults ...TextVerticalAlign)TextVerticalAlign

GetTextVerticalAlign returns the vertical alignment.

func (Style)GetTextWrap¶

func (sStyle) GetTextWrap(defaults ...TextWrap)TextWrap

GetTextWrap returns the word wrap.

func (Style)InheritFrom¶

func (sStyle) InheritFrom(defaultsStyle) (finalStyle)

InheritFrom coalesces two styles into a new style.

func (Style)IsZero¶

func (sStyle) IsZero()bool

IsZero returns if the object is set or not.

func (Style)ShouldDrawDot¶

func (sStyle) ShouldDrawDot()bool

ShouldDrawDot tells drawing functions if they should draw the dot.

func (Style)ShouldDrawFill¶

func (sStyle) ShouldDrawFill()bool

ShouldDrawFill tells drawing functions if they should draw the stroke.

func (Style)ShouldDrawStroke¶

func (sStyle) ShouldDrawStroke()bool

ShouldDrawStroke tells drawing functions if they should draw the stroke.

func (Style)String¶

func (sStyle) String()string

String returns a text representation of the style.

func (Style)WriteDrawingOptionsToRenderer¶

func (sStyle) WriteDrawingOptionsToRenderer(rRenderer)

WriteDrawingOptionsToRenderer passes just the drawing style options to a renderer.

func (Style)WriteToRenderer¶

func (sStyle) WriteToRenderer(rRenderer)

WriteToRenderer passes the style's options to a renderer.

type StyleProvider interface {GetStyle()Style}

type TextHorizontalAlignint

type TextStyle struct {HorizontalAlignTextHorizontalAlignVerticalAlignTextVerticalAlignWrapTextWrap}

type TextVerticalAlignint

type TextWrapint

type Tick struct {Valuefloat64Labelstring}

funcGenerateContinuousTicks¶

func GenerateContinuousTicks(rRenderer, raRange, isVerticalbool, styleStyle, vfValueFormatter) []Tick

GenerateContinuousTicks generates a set of ticks.

type TickPositionint

type Ticks []Tick

func (Ticks)Len¶

func (tTicks) Len()int

Len returns the length of the ticks set.

func (Ticks)Less¶

func (tTicks) Less(i, jint)bool

Less returns if i's value is less than j's value.

func (Ticks)String¶

func (tTicks) String()string

String returns a string representation of the set of ticks.

func (Ticks)Swap¶

func (tTicks) Swap(i, jint)

Swap swaps two elements.

type TicksProvider interface {GetTicks(vfValueFormatter) []Tick}

type TimeSeries struct {NamestringStyleStyleYAxisYAxisTypeXValues []time.TimeYValues []float64}

func (TimeSeries)GetFirstValues¶

func (tsTimeSeries) GetFirstValues() (x, yfloat64)

GetFirstValues gets the first values.

func (TimeSeries)GetLastValues¶

func (tsTimeSeries) GetLastValues() (x, yfloat64)

GetLastValues gets the last values.

func (TimeSeries)GetName¶

func (tsTimeSeries) GetName()string

GetName returns the name of the time series.

func (TimeSeries)GetStyle¶

func (tsTimeSeries) GetStyle()Style

GetStyle returns the line style.

func (TimeSeries)GetValueFormatters¶

func (tsTimeSeries) GetValueFormatters() (x, yValueFormatter)

GetValueFormatters returns value formatter defaults for the series.

func (TimeSeries)GetValues¶

func (tsTimeSeries) GetValues(indexint) (x, yfloat64)

GetValues gets x, y values at a given index.

func (TimeSeries)GetYAxis¶

func (tsTimeSeries) GetYAxis()YAxisType

GetYAxis returns which YAxis the series draws on.

func (TimeSeries)Len¶

func (tsTimeSeries) Len()int

Len returns the number of elements in the series.

func (TimeSeries)Render¶

func (tsTimeSeries) Render(rRenderer, canvasBoxBox, xrange, yrangeRange, defaultsStyle)

Render renders the series.

func (TimeSeries)Validate¶

func (tsTimeSeries) Validate()error

Validate validates the series.

type Times []time.Time

func (Times)Array¶

func (tTimes) Array() []time.Time

Array returns the times to an array.

func (Times)GetValue¶

func (tTimes) GetValue(indexint)float64

GetValue returns a value at an index as a time.

func (Times)Len¶

func (tTimes) Len()int

Len returns the length of the array.

func (Times)Less¶

func (tTimes) Less(i, jint)bool

Less reports whether the time at i occurs before the time at j.

func (Times)Swap¶

func (tTimes) Swap(i, jint)

Swap exchanges the time values at indexes i and j.

type Value struct {StyleStyleLabelstringValuefloat64}

type Value2 struct {StyleStyleLabelstringXValue, YValuefloat64}

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

funcNewValueBuffer¶

func NewValueBuffer(values ...float64) *ValueBuffer

NewValueBuffer creates a new value buffer with an optional set of values.

funcNewValueBufferWithCapacity¶

func NewValueBufferWithCapacity(capacityint) *ValueBuffer

NewValueBufferWithCapacity creates a new ValueBuffer pre-allocated with the given capacity.

func (*ValueBuffer)Array¶

func (b *ValueBuffer) Array()Array

Array returns the ring buffer, in order, as an array.

func (*ValueBuffer)Capacity¶

func (b *ValueBuffer) Capacity()int

Capacity returns the total size of the Buffer, including empty elements.

func (*ValueBuffer)Clear¶

func (b *ValueBuffer) Clear()

Clear removes all objects from the Buffer.

func (*ValueBuffer)Dequeue¶

func (b *ValueBuffer) Dequeue()float64

Dequeue removes the first element from the RingBuffer.

func (*ValueBuffer)Each¶

func (b *ValueBuffer) Each(mapfn func(int,float64))

Each calls the consumer for each element in the buffer.

func (*ValueBuffer)Enqueue¶

func (b *ValueBuffer) Enqueue(valuefloat64)

Enqueue adds an element to the "back" of the Buffer.

func (*ValueBuffer)GetValue¶

func (b *ValueBuffer) GetValue(indexint)float64

GetValue returns the value stored at the provided index.

func (*ValueBuffer)Len¶

func (b *ValueBuffer) Len()int

Len returns the length of the Buffer (as it is currently populated).Actual memory footprint may be different.

func (*ValueBuffer)Peek¶

func (b *ValueBuffer) Peek()float64

Peek returns but does not remove the first element.

func (*ValueBuffer)PeekBack¶

func (b *ValueBuffer) PeekBack()float64

PeekBack returns but does not remove the last element.

func (*ValueBuffer)SetCapacity¶

func (b *ValueBuffer) SetCapacity(capacityint)

SetCapacity sets the capacity of the Buffer.

func (*ValueBuffer)String¶

func (b *ValueBuffer) String()string

String returns a string representation for value buffers.

func (*ValueBuffer)TrimExcess¶

func (b *ValueBuffer) TrimExcess()

TrimExcess resizes the capacity of the buffer to better fit the contents.

type ValueFormatter func(v interface{})string

funcKValueFormatter¶

func KValueFormatter(kfloat64, vfValueFormatter)ValueFormatter

KValueFormatter is a formatter for K values.

funcTimeValueFormatterWithFormat¶

func TimeValueFormatterWithFormat(formatstring)ValueFormatter

TimeValueFormatterWithFormat returns a time formatter with a given format.

type ValueFormatterProvider interface {GetValueFormatters() (x, yValueFormatter)}

type Values []Value

func (Values)Normalize¶

func (vsValues) Normalize() []Value

Normalize returns the values normalized.

func (Values)Values¶

func (vsValues) Values() []float64

Values returns the values.

func (Values)ValuesNormalized¶

func (vsValues) ValuesNormalized() []float64

ValuesNormalized returns normalized values.

type ValuesProvider interface {Len()intGetValues(indexint) (float64,float64)}

type XAxis struct {NamestringNameStyleStyleStyleStyleValueFormatterValueFormatterRangeRangeTickStyleStyleTicks        []TickTickPositionTickPositionGridLines      []GridLineGridMajorStyleStyleGridMinorStyleStyle}