An example of embedding an image in a plot with non-linear axes.
()
| 48 | |
| 49 | // An example of embedding an image in a plot with non-linear axes. |
| 50 | func ExampleImage_log() { |
| 51 | p := plot.New() |
| 52 | p.Title.Text = "A Logo" |
| 53 | |
| 54 | // load an image |
| 55 | f, err := os.Open("testdata/gopher.png") |
| 56 | if err != nil { |
| 57 | log.Fatalf("error opening image file: %v\n", err) |
| 58 | } |
| 59 | defer f.Close() |
| 60 | |
| 61 | img, err := png.Decode(f) |
| 62 | if err != nil { |
| 63 | log.Fatalf("error decoding image file: %v\n", err) |
| 64 | } |
| 65 | |
| 66 | p.Add(plotter.NewImage(img, 100, 100, 10000, 10000)) |
| 67 | |
| 68 | // Transform axes. |
| 69 | p.X.Scale = plot.LogScale{} |
| 70 | p.Y.Scale = plot.LogScale{} |
| 71 | p.X.Tick.Marker = plot.LogTicks{Prec: -1} |
| 72 | p.Y.Tick.Marker = plot.LogTicks{Prec: 3} |
| 73 | |
| 74 | const ( |
| 75 | w = 5 * vg.Centimeter |
| 76 | h = 5 * vg.Centimeter |
| 77 | ) |
| 78 | |
| 79 | err = p.Save(w, h, "testdata/image_plot_log.png") |
| 80 | if err != nil { |
| 81 | log.Fatalf("error saving image plot: %v\n", err) |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | // An example of embedding a uniform image in a plot. |
| 86 | func ExampleImage_uniform() { |