Function TestErrBar

plot/plots/plot_test.go:287–327

(t *testing.T)

}

func TestErrBar(t *testing.T) {
	pt := plot.New()
	pt.Title.Text = "Test Line Errors"
	pt.X.Label.Text = "X Axis"
	pt.Y.Min = 0
	pt.Y.Max = 100
	pt.Y.Label.Text = "Y Axis"

	data := make(plot.XYs, 21)
	for i := range data {
		x := float32(i % 21)
		data[i].X = x * 5
		data[i].Y = float32(50) + 40*math32.Sin((x/8)*math32.Pi)
	}

	yerr := make(YErrors, 21)
	for i := range yerr {
		x := float32(i % 21)
		yerr[i].High = float32(5) + 4*math32.Cos((x/8)*math32.Pi)
		yerr[i].Low = -yerr[i].High
	}

	xyerr := XYErr{XYs: data, YErrors: yerr}

	l1, err := NewLine(data)
	if err != nil {
		t.Error(err.Error())
	}
	pt.Add(l1)
	pt.Legend.Add("Sine", l1)

	l2, err := NewYErrorBars(xyerr)
	if err != nil {
		t.Error(err.Error())
	}
	pt.Add(l2)

	pt.Resize(image.Point{640, 480})
	pt.Draw()
	imagex.Assert(t, pt.Pixels, "errbar.png")
}