Пример #1
0
// Example_errBars draws points and error bars.
func Example_errBars() *plot.Plot {

	type errPoints struct {
		plotter.XYs
		plotter.YErrors
		plotter.XErrors
	}

	rand.Seed(int64(0))
	n := 15
	data := errPoints{
		plotter.XYs:     randomPoints(n),
		plotter.YErrors: plotter.YErrors(randomError(n)),
		plotter.XErrors: plotter.XErrors(randomError(n)),
	}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	scatter := plotter.NewScatter(data)
	scatter.Shape = plot.CrossGlyph{}
	p.Add(scatter, plotter.NewXErrorBars(data), plotter.NewYErrorBars(data))
	p.Add(plotter.NewGlyphBoxes())

	return p
}
Пример #2
0
// AddErrorBars adds XErrorBars and YErrorBars
// to a plot.  The variadic arguments must be
// of type plotter.XYer, and must be either a
// plotter.XErrorer, plotter.YErrorer, or both.
// Each errorer is added to the plot the color from
// the Colors function corresponding to its position
// in the argument list.
func AddErrorBars(plt *plot.Plot, vs ...interface{}) {
	for i, v := range vs {
		added := false

		if xerr, ok := v.(interface {
			plotter.XYer
			plotter.XErrorer
		}); ok {
			e := plotter.NewXErrorBars(xerr)
			e.Color = Color(i)
			plt.Add(e)
			added = true
		}

		if yerr, ok := v.(interface {
			plotter.XYer
			plotter.YErrorer
		}); ok {
			e := plotter.NewYErrorBars(yerr)
			e.Color = Color(i)
			plt.Add(e)
			added = true
		}

		if added {
			continue
		}
		panic(fmt.Sprintf("AddErrorBars expects plotter.XErrorer or plotter.YErrorer, got %T", v))
	}
}
Пример #3
0
// AddXErrorBars adds XErrorBars to a plot.
// The variadic arguments must be
// of type plotter.XYer, and plotter.XErrorer.
// Each errorer is added to the plot the color from
// the Colors function corresponding to its position
// in the argument list.
func AddXErrorBars(plt *plot.Plot, es ...interface {
	plotter.XYer
	plotter.XErrorer
}) {
	for i, e := range es {
		bars := plotter.NewXErrorBars(e)
		bars.Color = Color(i)
		plt.Add(bars)
	}
}