本文整理汇总了Golang中github.com/gonum/plot/vg/vgimg.PngCanvas类的典型用法代码示例。如果您正苦于以下问题:Golang PngCanvas类的具体用法?Golang PngCanvas怎么用?Golang PngCanvas使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了PngCanvas类的7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: PlotGraph
func PlotGraph(title string, timestamps []int64, w io.Writer) error {
p, err := plot.New()
if err != nil {
return err
}
p.Title.Text = title
p.X.Label.Text = "Time"
p.Y.Label.Text = "Number of stars"
p.Y.Min = 0
points := make(plotter.XYs, len(timestamps))
for i, timestamp := range timestamps {
points[i].X = float64(timestamp)
points[i].Y = float64(i + 1)
}
plotutil.AddLinePoints(p, "Stars", points)
c := vgimg.New(4*vg.Inch, 4*vg.Inch)
cpng := vgimg.PngCanvas{c}
p.Draw(draw.New(cpng))
if _, err := cpng.WriteTo(w); err != nil {
return err
}
return nil
}
开发者ID:bronzdoc,项目名称:stargraph,代码行数:28,代码来源:plot.go
示例2: TestTextGrobs
func TestTextGrobs(t *testing.T) {
// Output
file, err := os.Create("text.png")
if err != nil {
t.Fatalf("%", err)
}
pngCanvas := vgimg.PngCanvas{Canvas: vgimg.New(10*vg.Inch, 8*vg.Inch)}
vg.Initialize(pngCanvas)
allVP := Viewport{
X0: 0,
Y0: 0,
Width: 10 * vg.Inch,
Height: 8 * vg.Inch,
Canvas: pngCanvas,
}
bg := GrobRect{xmin: 0, ymin: 0, xmax: 1, ymax: 1, fill: BuiltinColors["gray60"]}
bg.Draw(allVP)
gridVP := allVP.Sub(0.1, 0.1, 0.35, 0.35)
drawTextGrid(gridVP, 0)
gridVP = allVP.Sub(0.55, 0.1, 0.35, 0.35)
drawTextGrid(gridVP, 45./180*math.Pi)
gridVP = allVP.Sub(0.1, 0.55, 0.35, 0.35)
drawTextGrid(gridVP, 135./180*math.Pi)
gridVP = allVP.Sub(0.55, 0.55, 0.35, 0.35)
drawTextGrid(gridVP, 90./180*math.Pi)
pngCanvas.WriteTo(file)
file.Close()
}
开发者ID:vdobler,项目名称:plot,代码行数:32,代码来源:grob_test.go
示例3: WritePNG
// WritePNG renders plot to a png file of size width x height.
func (p *Plot) WritePNG(filename string, width, height vg.Length) error {
file, err := os.Create(filename)
if err != nil {
return err
}
defer file.Close()
canvas := vgimg.PngCanvas{Canvas: vgimg.New(width, height)}
canvas.Translate(-width/2, -height/2)
p.DumpTo(canvas, width, height)
canvas.WriteTo(file)
return nil
}
开发者ID:vdobler,项目名称:plot,代码行数:14,代码来源:plot.go
示例4: TestIndividualSteps
//.........这里部分代码省略.........
}
data = panel.Layers[2].Data
if data.N != 20 {
t.Errorf("Got %d data in label df.", panel.Layers[2].Data.N)
}
// StatBin produces bins
if fields := panel.Layers[3].Data.FieldNames(); !same(fields, []string{"x", "count", "ncount", "density", "ndensity"}) {
t.Errorf("Layer 3 %q has fields %v", panel.Layers[3].Name, fields)
}
data = panel.Layers[3].Data
if data.N != 11 {
t.Errorf("Got %d data in binned df.", panel.Layers[3].Data.N)
}
// 4. Wireing
panel.WireStatToGeom()
for a, s := range panel.Scales {
fmt.Printf("====== Scale %s %q ========\n", a, s.Name)
fmt.Printf("%s\n", s.String())
}
// 5. Test Construct ConstructGeoms. This shouldn't change much as
// GeomABLine doesn't reparametrize and we don't do position adjustments.
panel.ConstructGeoms()
// 6. FinalizeScales
panel.FinalizeScales()
// Only x and y are set up
if sx, ok := panel.Scales["x"]; !ok {
t.Errorf("Missing x scale")
} else {
if sx.Pos == nil {
t.Errorf("Missing Pos for x scale.")
}
if sx.DomainMin > 1.62 || sx.DomainMax < 1.95 {
t.Errorf("Bad training: %f %f", sx.DomainMin, sx.DomainMax)
}
}
fmt.Printf("%s\n", panel.Scales["x"])
fmt.Printf("%s\n", panel.Scales["y"])
// 7. Render Geoms to Grobs using scales (Step7).
panel.RenderGeoms()
fmt.Println("Layer 0, raw data")
for _, grob := range panel.Layers[0].Grobs {
fmt.Println(" ", grob.String())
}
fmt.Println("Layer 1, linear regression")
for _, grob := range panel.Layers[1].Grobs {
fmt.Println(" ", grob.String())
}
fmt.Println("Layer 2, labels")
for _, grob := range panel.Layers[2].Grobs {
fmt.Println(" ", grob.String())
}
fmt.Println("Layer 3, histogram")
for _, grob := range panel.Layers[3].Grobs {
fmt.Println(" ", grob.String())
}
// Output
pngCanvas := vgimg.PngCanvas{Canvas: vgimg.New(800, 600)}
pngCanvas.Translate(-400, -300)
vp := Viewport{
X0: 50,
Y0: 50,
Width: 700,
Height: 500,
Canvas: pngCanvas,
}
file, err := os.Create("example.png")
if err != nil {
t.Fatalf("%", err)
}
panel.Draw(vp, true, true)
if false {
fmt.Println("Layer 0, raw data")
for _, grob := range panel.Layers[0].Grobs {
grob.Draw(vp)
}
fmt.Println("Layer 1, linear regression")
for _, grob := range panel.Layers[1].Grobs {
grob.Draw(vp)
}
fmt.Println("Layer 2, labels")
for _, grob := range panel.Layers[2].Grobs {
grob.Draw(vp)
}
fmt.Println("Layer 3, histogram")
for _, grob := range panel.Layers[3].Grobs {
grob.Draw(vp)
}
}
pngCanvas.WriteTo(file)
file.Close()
}
开发者ID:vdobler,项目名称:plot,代码行数:101,代码来源:plot_test.go
示例5: drawPng
func drawPng(b *bytes.Buffer, p *plot.Plot, width, height float64) {
w, h := vg.Inches(width), vg.Inches(height)
c := vgimg.PngCanvas{Canvas: vgimg.New(w, h)}
p.Draw(plot.MakeDrawArea(c))
c.WriteTo(b)
}
开发者ID:ceeaspb,项目名称:tsviewdb,代码行数:6,代码来源:png.go
示例6: run
//.........这里部分代码省略.........
line, err := plotter.NewLine(table[i])
if err != nil {
log.Fatalf(
"error adding data points for nucleus %v: %v\n",
n, err,
)
}
line.LineStyle.Color = col(n)
line.LineStyle.Width = vg.Points(1)
p.Add(line)
p.Legend.Add(label(n), line)
}
p.Add(plotter.NewGrid())
p.Legend.Top = true
p.Legend.XOffs = -1 * vg.Centimeter
figX := 25 * vg.Centimeter
figY := figX / vg.Length(math.Phi)
// Create a Canvas for writing SVG images.
canvas := vgsvg.New(figX, figY)
// Draw to the Canvas.
p.Draw(draw.New(canvas))
outsvg := new(bytes.Buffer)
_, err = canvas.WriteTo(outsvg)
if err != nil {
log.Printf("error svg: %v\n", err)
return
}
err = websocket.JSON.Send(c.ws, plotReply{
ID: id, Err: err, SVG: outsvg.String(), Stage: "plot-done",
})
if err != nil {
log.Printf("error sending data: %v\n", err)
return
}
pngcanvas := vgimg.PngCanvas{Canvas: vgimg.New(figX, figY)}
p.Draw(draw.New(pngcanvas))
outpng := new(bytes.Buffer)
_, err = pngcanvas.WriteTo(outpng)
if err != nil {
log.Printf("error png: %v\n", err)
return
}
href := filepath.Join(dir, fmt.Sprintf("output-%d.zip", id))
zipf, err := os.Create(href)
if err != nil {
log.Printf("error creating zip file: %v\n", err)
}
defer zipf.Close()
zipw := zip.NewWriter(zipf)
defer zipw.Close()
for _, file := range []struct {
Name string
Body []byte
}{
{"output.csv", csvdata},
{"output.png", outpng.Bytes()},
} {
ff, err := zipw.Create(file.Name)
if err != nil {
log.Printf("error creating zip content %v: %v\n", file.Name, err)
return
}
_, err = ff.Write(file.Body)
if err != nil {
log.Printf("error writing zip content %v: %v\n", file.Name, err)
return
}
}
err = zipw.Close()
if err != nil {
log.Printf("error closing zip-writer: %v\n", err)
return
}
err = zipf.Close()
if err != nil {
log.Printf("error closing zip-file: %v\n", err)
return
}
err = websocket.JSON.Send(c.ws, zipReply{
ID: id, Err: err, Href: href, Stage: "zip-done",
})
if err != nil {
log.Printf("error sending zip: %v\n", err)
return
}
log.Printf("saved report under %v\n", href)
}
}
开发者ID:astrogo,项目名称:snfusion,代码行数:101,代码来源:main.go
示例7: TestGraphicGrobs
func TestGraphicGrobs(t *testing.T) {
// Output
file, err := os.Create("grobs.png")
if err != nil {
t.Fatalf("%", err)
}
pngCanvas := vgimg.PngCanvas{Canvas: vgimg.New(10*vg.Inch, 8*vg.Inch)}
vg.Initialize(pngCanvas)
pngCanvas.Translate(-5*vg.Inch, -4*vg.Inch)
dot := func(x, y float64) {
pngCanvas.Push()
pngCanvas.SetColor(BuiltinColors["red"])
pngCanvas.SetLineWidth(5)
var p vg.Path
xr := vg.Length(x) * vg.Inch
yr := vg.Length(y) * vg.Inch
p.Move(xr-5, yr-5)
p.Line(xr-5, yr+5)
p.Line(xr+5, yr+5)
p.Line(xr+5, yr-5)
p.Close()
pngCanvas.Fill(p)
pngCanvas.Pop()
}
dot(0, 0)
dot(5, 0)
dot(0, 4)
allVP := Viewport{
X0: 0,
Y0: 0,
Width: 10 * vg.Inch,
Height: 8 * vg.Inch,
Canvas: pngCanvas,
}
innerVP := allVP.Sub(0.05, 0.05, 0.9, 0.9)
bg := GrobRect{xmin: 0, ymin: 0, xmax: 1, ymax: 1, fill: BuiltinColors["gray80"]}
bg.Draw(innerVP)
cols := []string{"red", "green", "blue", "cyan", "magenta", "yellow",
"white", "gray", "black"}
// Draw points in all shapes, three sizes and all builtin colors.
points := []Grob{}
x, y := 0.1, 0.1
for shape := DotPoint; shape <= StarPoint; shape++ {
for size := 2; size < 7; size += 2 {
y = 0.05
for _, col := range cols {
g := GrobPoint{
x: x,
y: y,
size: float64(size),
shape: shape,
color: BuiltinColors[col],
}
points = append(points, g)
y += 0.035
}
x += 0.021
}
}
x, y = 0.02, 0.05
for _, col := range cols {
g := GrobText{
x: x,
y: y,
text: col,
size: 10,
color: BuiltinColors[col],
vjust: 0.5,
hjust: 0,
}
points = append(points, g)
y += 0.035
}
x, y = 0.121, 0.36
for shape := DotPoint; shape <= StarPoint; shape++ {
dy := float64(shape%2) * 0.015
g := GrobText{
x: x,
y: y + dy,
text: shape.String(),
size: 10,
color: BuiltinColors["black"],
vjust: 0.5,
hjust: 0.5,
}
points = append(points, g)
x += 3 * 0.021
}
for _, grob := range points {
grob.Draw(innerVP)
}
// Draw lines with different styles and widths.
lines := []Grob{}
x, y = 0.1, 0.45
//.........这里部分代码省略.........
开发者ID:vdobler,项目名称:plot,代码行数:101,代码来源:grob_test.go
注:本文中的github.com/gonum/plot/vg/vgimg.PngCanvas类示例整理自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。 |
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