Function complexContourBench

plotter/contour_test.go:122–145

(noise float64, b *testing.B)

var cp map[float64][]vg.Path

func complexContourBench(noise float64, b *testing.B) {
	rnd := rand.New(rand.NewPCG(1, 1))

	data := make([]float64, 6400)
	for i := range data {
		r := float64(i/80) - 40
		c := float64(i%80) - 40

		data[i] = rnd.NormFloat64()*noise + math.Hypot(r, c)
	}

	m := unitGrid{mat.NewDense(80, 80, data)}

	levels := []float64{-1, 3, 7, 9, 13, 15, 19, 23, 27, 31}

	var p map[float64][]vg.Path

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		p = contourPaths(m, levels, unity, unity)
	}

	cp = p
}

func TestContourPaths(t *testing.T) {
	m := unitGrid{mat.NewDense(3, 4, []float64{