See https://github.com/gonum/plot/issues/488
()
| 18 | |
| 19 | // See https://github.com/gonum/plot/issues/488 |
| 20 | func clippedFilledLine() { |
| 21 | rnd := rand.New(rand.NewPCG(1, 1)) |
| 22 | |
| 23 | // randomPoints returns some random x, y points |
| 24 | // with some interesting kind of trend. |
| 25 | randomPoints := func(n int, x float64) plotter.XYs { |
| 26 | pts := make(plotter.XYs, n) |
| 27 | for i := range pts { |
| 28 | if i == 0 { |
| 29 | pts[i].X = x + rnd.Float64() |
| 30 | } else { |
| 31 | pts[i].X = pts[i-1].X + 0.5 + rnd.Float64() |
| 32 | } |
| 33 | pts[i].Y = -5. + 10*rnd.Float64() |
| 34 | } |
| 35 | return pts |
| 36 | } |
| 37 | |
| 38 | p := plot.New() |
| 39 | p.Title.Text = "Filled Line Example" |
| 40 | p.X.Label.Text = "X" |
| 41 | p.Y.Label.Text = "Y" |
| 42 | p.Add(plotter.NewGrid()) |
| 43 | |
| 44 | filled, err := plotter.NewLine(randomPoints(4, 0)) |
| 45 | if err != nil { |
| 46 | log.Panic(err) |
| 47 | } |
| 48 | filled.FillColor = color.RGBA{R: 196, G: 255, B: 196, A: 255} |
| 49 | |
| 50 | p.Add(filled) |
| 51 | // testing clipping |
| 52 | p.X.Min, p.X.Max = 1, 3.5 |
| 53 | p.Y.Max = 4 |
| 54 | |
| 55 | err = p.Save(200, 200, "testdata/clippedFilledLine.png") |
| 56 | if err != nil { |
| 57 | log.Panic(err) |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | func TestFilledLine(t *testing.T) { |
| 62 | cmpimg.CheckPlot(ExampleLine_filledLine, t, "filledLine_"+runtime.GOARCH+".png") |