general_example_test.go

Documentation: gonum.org/v1/plot/plotter

     1  // Copyright ©2015 The Gonum Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package plotter_test
     6  
     7  import (
     8  	"log"
     9  
    10  	"gonum.org/v1/plot"
    11  	"gonum.org/v1/plot/plotter"
    12  	"gonum.org/v1/plot/vg"
    13  )
    14  
    15  // Draw the plot logo.
    16  func Example() {
    17  	p := plot.New()
    18  
    19  	plotter.DefaultLineStyle.Width = vg.Points(1)
    20  	plotter.DefaultGlyphStyle.Radius = vg.Points(3)
    21  
    22  	p.Y.Tick.Marker = plot.ConstantTicks([]plot.Tick{
    23  		{Value: 0, Label: "0"}, {Value: 0.25, Label: ""}, {Value: 0.5, Label: "0.5"}, {Value: 0.75, Label: ""}, {Value: 1, Label: "1"},
    24  	})
    25  	p.X.Tick.Marker = plot.ConstantTicks([]plot.Tick{
    26  		{Value: 0, Label: "0"}, {Value: 0.25, Label: ""}, {Value: 0.5, Label: "0.5"}, {Value: 0.75, Label: ""}, {Value: 1, Label: "1"},
    27  	})
    28  
    29  	pts := plotter.XYs{{X: 0, Y: 0}, {X: 0, Y: 1}, {X: 0.5, Y: 1}, {X: 0.5, Y: 0.6}, {X: 0, Y: 0.6}}
    30  	line, err := plotter.NewLine(pts)
    31  	if err != nil {
    32  		log.Panic(err)
    33  	}
    34  	scatter, err := plotter.NewScatter(pts)
    35  	if err != nil {
    36  		log.Panic(err)
    37  	}
    38  	p.Add(line, scatter)
    39  
    40  	pts = plotter.XYs{{X: 1, Y: 0}, {X: 0.75, Y: 0}, {X: 0.75, Y: 0.75}}
    41  	line, err = plotter.NewLine(pts)
    42  	if err != nil {
    43  		log.Panic(err)
    44  	}
    45  	scatter, err = plotter.NewScatter(pts)
    46  	if err != nil {
    47  		log.Panic(err)
    48  	}
    49  	p.Add(line, scatter)
    50  
    51  	pts = plotter.XYs{{X: 0.5, Y: 0.5}, {X: 1, Y: 0.5}}
    52  	line, err = plotter.NewLine(pts)
    53  	if err != nil {
    54  		log.Panic(err)
    55  	}
    56  	scatter, err = plotter.NewScatter(pts)
    57  	if err != nil {
    58  		log.Panic(err)
    59  	}
    60  	p.Add(line, scatter)
    61  
    62  	err = p.Save(100, 100, "testdata/plotLogo.png")
    63  	if err != nil {
    64  		log.Panic(err)
    65  	}
    66  }
    67
View as plain text