// Plot implements the plot.Plotter interface. func (b *BarChart) Plot(da plot.DrawArea, plt *plot.Plot) { trX, trY := plt.Transforms(&da) for i, ht := range b.Values { x := b.XMin + float64(i) xmin := trX(float64(x)) if !da.ContainsX(xmin) { continue } xmin = xmin - b.Width/2 + b.Offset xmax := xmin + b.Width bottom := b.stackedOn.BarHeight(i) ymin := trY(bottom) ymax := trY(bottom + ht) pts := []plot.Point{ {xmin, ymin}, {xmin, ymax}, {xmax, ymax}, {xmax, ymin}, } poly := da.ClipPolygonY(pts) da.FillPolygon(b.Color, poly) pts = append(pts, plot.Point{xmin, ymin}) outline := da.ClipLinesY(pts) da.StrokeLines(b.LineStyle, outline...) } }
// Plot implements the Plotter interface, drawing labels. func (e *YErrorBars) Plot(da plot.DrawArea, p *plot.Plot) { trX, trY := p.Transforms(&da) for i, err := range e.YErrors { x := trX(e.XYs[i].X) ylow := trY(e.XYs[i].Y - err.Low) yhigh := trY(e.XYs[i].Y + err.High) bar := da.ClipLinesY([]plot.Point{{x, ylow}, {x, yhigh}}) da.StrokeLines(e.LineStyle, bar...) e.drawCap(&da, x, ylow) e.drawCap(&da, x, yhigh) } }
func (b *BarChart) Thumbnail(da *plot.DrawArea) { pts := []plot.Point{ {da.Min.X, da.Min.Y}, {da.Min.X, da.Max().Y}, {da.Max().X, da.Max().Y}, {da.Max().X, da.Min.Y}, } poly := da.ClipPolygonY(pts) da.FillPolygon(b.Color, poly) pts = append(pts, plot.Point{da.Min.X, da.Min.Y}) outline := da.ClipLinesY(pts) da.StrokeLines(b.LineStyle, outline...) }
func (b *BoxPlot) Plot(da plot.DrawArea, plt *plot.Plot) { trX, trY := plt.Transforms(&da) x := trX(b.Location) if !da.ContainsX(x) { return } med := trY(b.Median) q1 := trY(b.Quartile1) q3 := trY(b.Quartile3) aLow := trY(b.AdjLow) aHigh := trY(b.AdjHigh) box := da.ClipLinesY([]plot.Point{ {x - b.Width/2, q1}, {x - b.Width/2, q3}, {x + b.Width/2, q3}, {x + b.Width/2, q1}, {x - b.Width/2 - b.BoxStyle.Width/2, q1}, }) da.StrokeLines(b.BoxStyle, box...) medLine := da.ClipLinesY([]plot.Point{ {x - b.Width/2, med}, {x + b.Width/2, med}, }) da.StrokeLines(b.MedianStyle, medLine...) cap := b.CapWidth / 2 whisks := da.ClipLinesY([]plot.Point{{x, q3}, {x, aHigh}}, []plot.Point{{x - cap, aHigh}, {x + cap, aHigh}}, []plot.Point{{x, q1}, {x, aLow}}, []plot.Point{{x - cap, aLow}, {x + cap, aLow}}) da.StrokeLines(b.WhiskerStyle, whisks...) for _, out := range b.Outside { y := trY(b.Value(out)) da.DrawGlyph(b.GlyphStyle, plot.Point{x, y}) } }