Golang plot.New函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了Golang中github.com/sksullivan/plot.New函数的典型用法代码示例。如果您正苦于以下问题：Golang New函数的具体用法？Golang New怎么用？Golang New使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了New函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: Example_groupedBoxPlots

// Example_groupedBoxPlots draws vertical boxplots.
func Example_groupedBoxPlots() *plot.Plot {
	rand.Seed(int64(0))
	n := 100
	uniform := make(plotter.Values, n)
	normal := make(plotter.Values, n)
	expon := make(plotter.Values, n)
	for i := 0; i < n; i++ {
		uniform[i] = rand.Float64()
		normal[i] = rand.NormFloat64()
		expon[i] = rand.ExpFloat64()
	}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Box Plot"
	p.Y.Label.Text = "plotter.Values"

	w := vg.Points(20)
	for x := 0.0; x < 3.0; x++ {
		b0 := must(plotter.NewBoxPlot(w, x, uniform)).(*plotter.BoxPlot)
		b0.Offset = -w - vg.Points(3)
		b1 := must(plotter.NewBoxPlot(w, x, normal)).(*plotter.BoxPlot)
		b2 := must(plotter.NewBoxPlot(w, x, expon)).(*plotter.BoxPlot)
		b2.Offset = w + vg.Points(3)
		p.Add(b0, b1, b2)
	}

	// Set the X axis of the plot to nominal with
	// the given names for x=0, x=1 and x=2.
	p.NominalX("Group 0", "Group 1", "Group 2")
	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:35，代码来源:main.go

示例2: Example_quartPlots

// Example_quartPlots draws vertical quartile plots.
func Example_quartPlots() *plot.Plot {
	rand.Seed(int64(0))
	n := 100
	uniform := make(plotter.Values, n)
	normal := make(plotter.Values, n)
	expon := make(plotter.Values, n)
	for i := 0; i < n; i++ {
		uniform[i] = rand.Float64()
		normal[i] = rand.NormFloat64()
		expon[i] = rand.ExpFloat64()
	}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Quartile Plot"
	p.Y.Label.Text = "plotter.Values"

	p.Add(must(plotter.NewQuartPlot(0, uniform)).(*plotter.QuartPlot),
		must(plotter.NewQuartPlot(1, normal)).(*plotter.QuartPlot),
		must(plotter.NewQuartPlot(2, expon)).(*plotter.QuartPlot))

	// Set the X axis of the plot to nominal with
	// the given names for x=0, x=1 and x=2.
	p.NominalX("Uniform\nDistribution", "Normal\nDistribution",
		"Exponential\nDistribution")
	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:30，代码来源:main.go

示例3: Example_errBars

// 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{
		XYs:     randomPoints(n),
		YErrors: plotter.YErrors(randomError(n)),
		XErrors: plotter.XErrors(randomError(n)),
	}

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

	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:36，代码来源:main.go

示例4: Example_functions

// Example_functions draws some functions.
func Example_functions() *plot.Plot {
	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Functions"
	p.X.Label.Text = "X"
	p.Y.Label.Text = "Y"

	quad := plotter.NewFunction(func(x float64) float64 { return x * x })
	quad.Color = color.RGBA{B: 255, A: 255}

	exp := plotter.NewFunction(func(x float64) float64 { return math.Pow(2, x) })
	exp.Dashes = []vg.Length{vg.Points(2), vg.Points(2)}
	exp.Width = vg.Points(2)
	exp.Color = color.RGBA{G: 255, A: 255}

	sin := plotter.NewFunction(func(x float64) float64 { return 10*math.Sin(x) + 50 })
	sin.Dashes = []vg.Length{vg.Points(4), vg.Points(5)}
	sin.Width = vg.Points(4)
	sin.Color = color.RGBA{R: 255, A: 255}

	p.Add(quad, exp, sin)
	p.Legend.Add("x^2", quad)
	p.Legend.Add("2^x", exp)
	p.Legend.Add("10*sin(x)+50", sin)
	p.Legend.ThumbnailWidth = 0.5 * vg.Inch

	p.X.Min = 0
	p.X.Max = 10
	p.Y.Min = 0
	p.Y.Max = 100
	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:35，代码来源:main.go

示例5: Example_histogram

// An example of making a histogram.
func Example_histogram() *plot.Plot {
	rand.Seed(int64(0))
	n := 10000
	vals := make(plotter.Values, n)
	for i := 0; i < n; i++ {
		vals[i] = rand.NormFloat64()
	}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Histogram"
	h, err := plotter.NewHist(vals, 16)
	if err != nil {
		panic(err)
	}
	h.Normalize(1)
	p.Add(h)

	// The normal distribution function
	norm := plotter.NewFunction(stdNorm)
	norm.Color = color.RGBA{R: 255, A: 255}
	norm.Width = vg.Points(2)
	p.Add(norm)

	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:29，代码来源:main.go

示例6: Example_logo

// Draw the plotinum logo.
func Example_logo() *plot.Plot {
	p, err := plot.New()
	if err != nil {
		panic(err)
	}

	plotter.DefaultLineStyle.Width = vg.Points(1)
	plotter.DefaultGlyphStyle.Radius = vg.Points(3)

	p.Y.Tick.Marker = plot.ConstantTicks([]plot.Tick{
		{0, "0"}, {0.25, ""}, {0.5, "0.5"}, {0.75, ""}, {1, "1"},
	})
	p.X.Tick.Marker = plot.ConstantTicks([]plot.Tick{
		{0, "0"}, {0.25, ""}, {0.5, "0.5"}, {0.75, ""}, {1, "1"},
	})

	pts := plotter.XYs{{0, 0}, {0, 1}, {0.5, 1}, {0.5, 0.6}, {0, 0.6}}
	line := must(plotter.NewLine(pts)).(*plotter.Line)
	scatter := must(plotter.NewScatter(pts)).(*plotter.Scatter)
	p.Add(line, scatter)

	pts = plotter.XYs{{1, 0}, {0.75, 0}, {0.75, 0.75}}
	line = must(plotter.NewLine(pts)).(*plotter.Line)
	scatter = must(plotter.NewScatter(pts)).(*plotter.Scatter)
	p.Add(line, scatter)

	pts = plotter.XYs{{0.5, 0.5}, {1, 0.5}}
	line = must(plotter.NewLine(pts)).(*plotter.Line)
	scatter = must(plotter.NewScatter(pts)).(*plotter.Scatter)
	p.Add(line, scatter)

	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:34，代码来源:main.go

示例7: TestIssue179

func TestIssue179(t *testing.T) {
	scatter, err := plotter.NewScatter(plotter.XYs{{1, 1}, {0, 1}, {0, 0}})
	if err != nil {
		log.Fatal(err)
	}
	p, err := plot.New()
	if err != nil {
		log.Fatal(err)
	}
	p.Add(scatter)
	p.HideAxes()

	c := vgimg.JpegCanvas{Canvas: vgimg.New(5.08*vg.Centimeter, 5.08*vg.Centimeter)}
	p.Draw(draw.New(c))
	b := bytes.NewBuffer([]byte{})
	if _, err = c.WriteTo(b); err != nil {
		t.Error(err)
	}

	f, err := os.Open(filepath.Join("testdata", "issue179.jpg"))
	if err != nil {
		t.Error(err)
	}
	defer f.Close()

	want, err := ioutil.ReadAll(f)
	if err != nil {
		t.Error(err)
	}
	if !bytes.Equal(b.Bytes(), want) {
		t.Error("Image mismatch")
	}
}

开发者ID:sksullivan，项目名称:plot，代码行数:33，代码来源:vgimg_test.go

示例8: TestComplexContours

func TestComplexContours(t *testing.T) {
	if !*visualDebug {
		return
	}
	for _, n := range []float64{0, 1, 2, 4, 8, 16, 32} {
		rand.Seed(0)
		data := make([]float64, 6400)
		for i := range data {
			r := float64(i/80) - 40
			c := float64(i%80) - 40

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

		m := unitGrid{mat64.NewDense(80, 80, data)}

		levels := []float64{-1, 3, 7, 9, 13, 15, 19, 23, 27, 31}
		c := NewContour(m, levels, palette.Rainbow(10, palette.Blue, palette.Red, 1, 1, 1))

		plt, _ := plot.New()
		plt.Add(c)

		plt.X.Padding = 0
		plt.Y.Padding = 0
		plt.X.Max = 79.5
		plt.Y.Max = 79.5
		plt.Save(7, 7, fmt.Sprintf("complex_contour-%v.svg", n))
	}
}

开发者ID:sksullivan，项目名称:plot，代码行数:29，代码来源:contour_test.go

示例9: TestHeatMapWithContour

func TestHeatMapWithContour(t *testing.T) {
	if !*visualDebug {
		return
	}
	m := unitGrid{mat64.NewDense(3, 4, []float64{
		2, 1, 4, 3,
		6, 7, 2, 5,
		9, 10, 11, 12,
	})}
	h := NewHeatMap(m, palette.Heat(12, 1))

	levels := []float64{1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 11.5}
	c := NewContour(m, levels, palette.Rainbow(10, palette.Blue, palette.Red, 1, 1, 1))
	c.LineStyles[0].Width *= 5

	plt, _ := plot.New()

	plt.Add(h)
	plt.Add(c)
	plt.Add(NewGlyphBoxes())

	plt.X.Padding = 0
	plt.Y.Padding = 0
	plt.X.Max = 3.5
	plt.Y.Max = 2.5
	plt.Save(7, 7, "heat.svg")
}

开发者ID:sksullivan，项目名称:plot，代码行数:27，代码来源:contour_test.go

示例10: Example_groupedHorizontalQuartPlots

func Example_groupedHorizontalQuartPlots() *plot.Plot {
	rand.Seed(int64(0))
	n := 100
	uniform := make(plotter.Values, n)
	normal := make(plotter.Values, n)
	expon := make(plotter.Values, n)
	for i := 0; i < n; i++ {
		uniform[i] = rand.Float64()
		normal[i] = rand.NormFloat64()
		expon[i] = rand.ExpFloat64()
	}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Box Plot"
	p.Y.Label.Text = "plotter.Values"

	w := vg.Points(10)
	for x := 0.0; x < 3.0; x++ {
		b0 := must(plotter.MakeHorizQuartPlot(x, uniform)).(plotter.HorizQuartPlot)
		b0.Offset = -w
		b1 := must(plotter.MakeHorizQuartPlot(x, normal)).(plotter.HorizQuartPlot)
		b2 := must(plotter.MakeHorizQuartPlot(x, expon)).(plotter.HorizQuartPlot)
		b2.Offset = w
		p.Add(b0, b1, b2)
	}
	p.Add(plotter.NewGlyphBoxes())

	p.NominalY("Group 0", "Group 1", "Group 2")
	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:33，代码来源:main.go

示例11: Example_horizontalQuartPlots

// Example_horizontalQuartPlots draws horizontal quartile plots
// with some labels on their points.
func Example_horizontalQuartPlots() *plot.Plot {
	rand.Seed(int64(0))
	n := 100
	uniform := make(valueLabels, n)
	normal := make(valueLabels, n)
	expon := make(valueLabels, n)
	for i := 0; i < n; i++ {
		uniform[i].Value = rand.Float64()
		uniform[i].Label = fmt.Sprintf("%4.4f", uniform[i].Value)
		normal[i].Value = rand.NormFloat64()
		normal[i].Label = fmt.Sprintf("%4.4f", normal[i].Value)
		expon[i].Value = rand.ExpFloat64()
		expon[i].Label = fmt.Sprintf("%4.4f", expon[i].Value)
	}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Horizontal Quartile Plot"
	p.X.Label.Text = "plotter.Values"

	// Make boxes for our data and add them to the plot.
	uniBox := must(plotter.MakeHorizQuartPlot(0, uniform)).(plotter.HorizQuartPlot)
	uniLabels, err := uniBox.OutsideLabels(uniform)
	if err != nil {
		panic(err)
	}

	normBox := must(plotter.MakeHorizQuartPlot(1, normal)).(plotter.HorizQuartPlot)
	normLabels, err := normBox.OutsideLabels(normal)
	if err != nil {
		panic(err)
	}

	expBox := must(plotter.MakeHorizQuartPlot(2, expon)).(plotter.HorizQuartPlot)
	expLabels, err := expBox.OutsideLabels(expon)
	if err != nil {
		panic(err)
	}
	p.Add(uniBox, uniLabels, normBox, normLabels, expBox, expLabels)

	// Add a GlyphBox plotter for debugging.
	p.Add(plotter.NewGlyphBoxes())

	// Set the Y axis of the plot to nominal with
	// the given names for y=0, y=1 and y=2.
	p.NominalY("Uniform\nDistribution", "Normal\nDistribution",
		"Exponential\nDistribution")
	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:53，代码来源:main.go

示例12: Example_verticalBoxPlots

// Example_verticalBoxPlots draws vertical boxplots
// with some labels on their points.
func Example_verticalBoxPlots() *plot.Plot {
	rand.Seed(int64(0))
	n := 100
	uniform := make(valueLabels, n)
	normal := make(valueLabels, n)
	expon := make(valueLabels, n)
	for i := 0; i < n; i++ {
		uniform[i].Value = rand.Float64()
		uniform[i].Label = fmt.Sprintf("%4.4f", uniform[i].Value)
		normal[i].Value = rand.NormFloat64()
		normal[i].Label = fmt.Sprintf("%4.4f", normal[i].Value)
		expon[i].Value = rand.ExpFloat64()
		expon[i].Label = fmt.Sprintf("%4.4f", expon[i].Value)
	}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Box Plot"
	p.Y.Label.Text = "plotter.Values"

	// Make boxes for our data and add them to the plot.
	uniBox := must(plotter.NewBoxPlot(vg.Points(20), 0, uniform)).(*plotter.BoxPlot)
	uniLabels, err := uniBox.OutsideLabels(uniform)
	if err != nil {
		panic(err)
	}

	normBox := must(plotter.NewBoxPlot(vg.Points(20), 1, normal)).(*plotter.BoxPlot)
	normLabels, err := normBox.OutsideLabels(normal)
	if err != nil {
		panic(err)
	}

	expBox := must(plotter.NewBoxPlot(vg.Points(20), 2, expon)).(*plotter.BoxPlot)
	expLabels, err := expBox.OutsideLabels(expon)
	if err != nil {
		panic(err)
	}

	p.Add(uniBox, uniLabels, normBox, normLabels, expBox, expLabels)

	// Set the X axis of the plot to nominal with
	// the given names for x=0, x=1 and x=2.
	p.NominalX("Uniform\nDistribution", "Normal\nDistribution",
		"Exponential\nDistribution")
	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:51，代码来源:main.go

示例13: main

func main() {
	var levels []float64
	for l := 100.5; l < volcano.Matrix.(*mat64.Dense).Max(); l += 5 {
		levels = append(levels, l)
	}
	c := plotter.NewContour(volcano, levels, palette.Rainbow(len(levels), (palette.Yellow+palette.Red)/2, palette.Blue, 1, 1, 1))
	quarterStyle := draw.LineStyle{
		Color:  color.Black,
		Width:  vg.Points(0.5),
		Dashes: []vg.Length{0.2, 0.4},
	}
	halfStyle := draw.LineStyle{
		Color:  color.Black,
		Width:  vg.Points(0.5),
		Dashes: []vg.Length{5, 2, 1, 2},
	}
	c.LineStyles = append(c.LineStyles, quarterStyle, halfStyle, quarterStyle)

	h := plotter.NewHeatMap(volcano, palette.Heat(len(levels)*2, 1))

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Maunga Whau Volcano"

	p.Add(h)
	p.Add(c)

	p.X.Padding = 0
	p.Y.Padding = 0
	_, p.X.Max, _, p.Y.Max = h.DataRange()

	name := "example_volcano"

	for _, ext := range []string{
		".eps",
		".pdf",
		".svg",
		".png",
		".tiff",
		".jpg",
	} {
		if err := p.Save(4, 4, name+ext); err != nil {
			panic(err)
		}
	}
}

开发者ID:sksullivan，项目名称:plot，代码行数:48，代码来源:volcano_example.go

示例14: lines

func lines(w vg.Length) (*plot.Plot, error) {
	p, err := plot.New()
	if err != nil {
		return nil, err
	}

	pts := plotter.XYs{{0, 0}, {0, 1}, {1, 0}, {1, 1}}
	line, err := plotter.NewLine(pts)
	line.Width = w
	if err != nil {
		return nil, err
	}
	p.Add(line)

	return p, nil
}

开发者ID:sksullivan，项目名称:plot，代码行数:16，代码来源:vg_test.go

示例15: main

func main() {
	rand.Seed(int64(0))

	p, err := plot.New()
	if err != nil {
		panic(err)
	}

	p.Title.Text = "Plotutil example"
	p.X.Label.Text = "X"
	p.Y.Label.Text = "Y"

	err = plotutil.AddLinePoints(
		p,
		"First", randomPoints(15),
	)
	if err != nil {
		panic(err)
	}

	cnvs, err := vgx11.New(4*96, 4*96, "Example")
	if err != nil {
		panic(err)
	}

	p.Draw(draw.New(cnvs))
	cnvs.Paint()
	time.Sleep(5 * time.Second)

	err = plotutil.AddLinePoints(
		p,
		"Second", randomPoints(15),
		"Third", randomPoints(15),
	)
	if err != nil {
		panic(err)
	}

	p.Draw(draw.New(cnvs))
	cnvs.Paint()
	time.Sleep(10 * time.Second)

	// Save the plot to a PNG file.
	//        if err := p.Save(4, 4, "points.png"); err != nil {
	//                panic(err)
	//        }
}

开发者ID:sksullivan，项目名称:plot，代码行数:47，代码来源:main.go

示例16: Example_stackedAreaChart

// An example of making a stacked area chart.
func Example_stackedAreaChart() *plot.Plot {
	p, err := plot.New()
	if err != nil {
		panic(err)
	}

	p.Title.Text = "Example: Software Version Comparison"
	p.X.Label.Text = "Date"
	p.Y.Label.Text = "Users (in thousands)"

	p.Legend.Top = true
	p.Legend.Left = true

	vals := []plotter.Values{
		plotter.Values{0.02, 0.015, 0, 0, 0, 0, 0},
		plotter.Values{0, 0.48, 0.36, 0.34, 0.32, 0.32, 0.28},
		plotter.Values{0, 0, 0.87, 1.4, 0.64, 0.32, 0.28},
		plotter.Values{0, 0, 0, 1.26, 0.34, 0.12, 0.09},
		plotter.Values{0, 0, 0, 0, 2.48, 2.68, 2.13},
		plotter.Values{0, 0, 0, 0, 0, 1.32, 0.54},
		plotter.Values{0, 0, 0, 0, 0, 0.68, 5.67},
	}

	err = plotutil.AddStackedAreaPlots(p, plotter.Values{2007, 2008, 2009, 2010, 2011, 2012, 2013},
		"Version 3.0",
		stackValues{vs: vals[0:7]},
		"Version 2.1",
		stackValues{vs: vals[0:6]},
		"Version 2.0.1",
		stackValues{vs: vals[0:5]},
		"Version 2.0",
		stackValues{vs: vals[0:4]},
		"Version 1.1",
		stackValues{vs: vals[0:3]},
		"Version 1.0",
		stackValues{vs: vals[0:2]},
		"Beta",
		stackValues{vs: vals[0:1]},
	)

	if err != nil {
		panic(err)
	}

	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:47，代码来源:main.go

示例17: Example_barChart

// An example of making a bar chart.
func Example_barChart() *plot.Plot {
	groupA := plotter.Values{20, 35, 30, 35, 27}
	groupB := plotter.Values{25, 32, 34, 20, 25}
	groupC := plotter.Values{12, 28, 15, 21, 8}
	groupD := plotter.Values{30, 42, 6, 9, 12}

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Bar chart"
	p.Y.Label.Text = "Heights"

	w := vg.Points(8)

	barsA := must(plotter.NewBarChart(groupA, w)).(*plotter.BarChart)
	barsA.Color = color.RGBA{R: 255, A: 255}
	barsA.Offset = -w / 2

	barsB := must(plotter.NewBarChart(groupB, w)).(*plotter.BarChart)
	barsB.Color = color.RGBA{R: 196, G: 196, A: 255}
	barsB.Offset = w / 2

	barsC := must(plotter.NewBarChart(groupC, w)).(*plotter.BarChart)
	barsC.Color = color.RGBA{B: 255, A: 255}
	barsC.XMin = 6
	barsC.Offset = -w / 2

	barsD := must(plotter.NewBarChart(groupD, w)).(*plotter.BarChart)
	barsD.Color = color.RGBA{B: 255, R: 255, A: 255}
	barsD.XMin = 6
	barsD.Offset = w / 2

	p.Add(barsA, barsB, barsC, barsD)
	p.Legend.Add("A", barsA)
	p.Legend.Add("B", barsB)
	p.Legend.Add("C", barsC)
	p.Legend.Add("D", barsD)
	p.Legend.Top = true
	p.NominalX("Zero", "One", "Two", "Three", "Four", "",
		"Six", "Seven", "Eight", "Nine", "Ten")

	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:45，代码来源:main.go

示例18: TestIssue179

func TestIssue179(t *testing.T) {
	if !hasX11() {
		t.Skip("no X11 environment")
	}

	scatter, err := plotter.NewScatter(plotter.XYs{{1, 1}, {0, 1}, {0, 0}})
	if err != nil {
		t.Fatalf("error: %v\n", err)
	}
	p, err := plot.New()
	if err != nil {
		t.Fatalf("error: %v\n", err)
	}
	p.Add(scatter)
	p.HideAxes()

	c, err := New(5.08*vg.Centimeter, 5.08*vg.Centimeter, "test issue179")
	if err != nil {
		t.Fatalf("error: %v\n", err)
	}

	p.Draw(draw.New(c))
	b := bytes.NewBuffer([]byte{})
	err = jpeg.Encode(b, c.ximg, nil)
	if err != nil {
		t.Error(err)
	}

	f, err := os.Open(filepath.Join("..", "vgimg", "testdata", "issue179.jpg"))
	if err != nil {
		t.Error(err)
	}
	defer f.Close()

	want, err := ioutil.ReadAll(f)
	if err != nil {
		t.Error(err)
	}
	if !bytes.Equal(b.Bytes(), want) {
		t.Error("Image mismatch")
	}
}

开发者ID:sksullivan，项目名称:plot，代码行数:42，代码来源:canvas_test.go

示例19: ExampleErrorPoints

func ExampleErrorPoints() {
	// Get some random data.
	n, m := 5, 10
	pts := make([]plotter.XYer, n)
	for i := range pts {
		xys := make(plotter.XYs, m)
		pts[i] = xys
		center := float64(i)
		for j := range xys {
			xys[j].X = center + (rand.Float64() - 0.5)
			xys[j].Y = center + (rand.Float64() - 0.5)
		}
	}

	plt, err := plot.New()
	if err != nil {
		panic(err)
	}

	mean95, err := NewErrorPoints(MeanAndConf95, pts...)
	if err != nil {
		panic(err)
	}
	medMinMax, err := NewErrorPoints(MedianAndMinMax, pts...)
	if err != nil {
		panic(err)
	}
	err = AddLinePoints(plt,
		"mean and 95% confidence", mean95,
		"median and minimum and maximum", medMinMax)
	if err != nil {
		panic(err)
	}
	if err := AddErrorBars(plt, mean95, medMinMax); err != nil {
		panic(err)
	}
	if err := AddScatters(plt, pts[0], pts[1], pts[2], pts[3], pts[4]); err != nil {
		panic(err)
	}

	plt.Save(4, 4, "centroids.png")
}

开发者ID:sksullivan，项目名称:plot，代码行数:42，代码来源:errorpoints_test.go

示例20: Example_points

// Example_points draws some scatter points, a line,
// and a line with points.
func Example_points() *plot.Plot {
	rand.Seed(int64(0))

	n := 15
	scatterData := randomPoints(n)
	lineData := randomPoints(n)
	linePointsData := randomPoints(n)

	p, err := plot.New()
	if err != nil {
		panic(err)
	}
	p.Title.Text = "Points Example"
	p.X.Label.Text = "X"
	p.Y.Label.Text = "Y"
	p.Add(plotter.NewGrid())

	s := must(plotter.NewScatter(scatterData)).(*plotter.Scatter)
	s.GlyphStyle.Color = color.RGBA{R: 255, B: 128, A: 255}
	s.GlyphStyle.Radius = vg.Points(3)

	l := must(plotter.NewLine(lineData)).(*plotter.Line)
	l.LineStyle.Width = vg.Points(1)
	l.LineStyle.Dashes = []vg.Length{vg.Points(5), vg.Points(5)}
	l.LineStyle.Color = color.RGBA{B: 255, A: 255}

	lpLine, lpPoints, err := plotter.NewLinePoints(linePointsData)
	if err != nil {
		panic(err)
	}
	lpLine.Color = color.RGBA{G: 255, A: 255}
	lpPoints.Shape = draw.CircleGlyph{}
	lpPoints.Color = color.RGBA{R: 255, A: 255}

	p.Add(s, l, lpLine, lpPoints)
	p.Legend.Add("scatter", s)
	p.Legend.Add("line", l)
	p.Legend.Add("line points", lpLine, lpPoints)

	return p
}

开发者ID:sksullivan，项目名称:plot，代码行数:43，代码来源:main.go

注：本文中的github.com/sksullivan/plot.New函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。