1 use plotters::prelude::*;
2
3 const OUT_FILE_NAME: &'static str = "plotters-doc-data/sample.png";
main() -> Result<(), Box<dyn std::error::Error>>4 fn main() -> Result<(), Box<dyn std::error::Error>> {
5 let root_area = BitMapBackend::new(OUT_FILE_NAME, (1024, 768)).into_drawing_area();
6
7 root_area.fill(&WHITE)?;
8
9 let root_area = root_area.titled("Image Title", ("sans-serif", 60))?;
10
11 let (upper, lower) = root_area.split_vertically(512);
12
13 let x_axis = (-3.4f32..3.4).step(0.1);
14
15 let mut cc = ChartBuilder::on(&upper)
16 .margin(5)
17 .set_all_label_area_size(50)
18 .caption("Sine and Cosine", ("sans-serif", 40))
19 .build_cartesian_2d(-3.4f32..3.4, -1.2f32..1.2f32)?;
20
21 cc.configure_mesh()
22 .x_labels(20)
23 .y_labels(10)
24 .disable_mesh()
25 .x_label_formatter(&|v| format!("{:.1}", v))
26 .y_label_formatter(&|v| format!("{:.1}", v))
27 .draw()?;
28
29 cc.draw_series(LineSeries::new(x_axis.values().map(|x| (x, x.sin())), &RED))?
30 .label("Sine")
31 .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &RED));
32
33 cc.draw_series(LineSeries::new(
34 x_axis.values().map(|x| (x, x.cos())),
35 &BLUE,
36 ))?
37 .label("Cosine")
38 .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &BLUE));
39
40 cc.configure_series_labels().border_style(&BLACK).draw()?;
41
42 /*
43 // It's possible to use a existing pointing element
44 cc.draw_series(PointSeries::<_, _, Circle<_>>::new(
45 (-3.0f32..2.1f32).step(1.0).values().map(|x| (x, x.sin())),
46 5,
47 Into::<ShapeStyle>::into(&RGBColor(255,0,0)).filled(),
48 ))?;*/
49
50 // Otherwise you can use a function to construct your pointing element yourself
51 cc.draw_series(PointSeries::of_element(
52 (-3.0f32..2.1f32).step(1.0).values().map(|x| (x, x.sin())),
53 5,
54 ShapeStyle::from(&RED).filled(),
55 &|coord, size, style| {
56 EmptyElement::at(coord)
57 + Circle::new((0, 0), size, style)
58 + Text::new(format!("{:?}", coord), (0, 15), ("sans-serif", 15))
59 },
60 ))?;
61
62 let drawing_areas = lower.split_evenly((1, 2));
63
64 for (drawing_area, idx) in drawing_areas.iter().zip(1..) {
65 let mut cc = ChartBuilder::on(&drawing_area)
66 .x_label_area_size(30)
67 .y_label_area_size(30)
68 .margin_right(20)
69 .caption(format!("y = x^{}", 1 + 2 * idx), ("sans-serif", 40))
70 .build_cartesian_2d(-1f32..1f32, -1f32..1f32)?;
71 cc.configure_mesh()
72 .x_labels(5)
73 .y_labels(3)
74 .max_light_lines(4)
75 .draw()?;
76
77 cc.draw_series(LineSeries::new(
78 (-1f32..1f32)
79 .step(0.01)
80 .values()
81 .map(|x| (x, x.powf(idx as f32 * 2.0 + 1.0))),
82 &BLUE,
83 ))?;
84 }
85
86 // To avoid the IO failure being ignored silently, we manually call the present function
87 root_area.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
88 println!("Result has been saved to {}", OUT_FILE_NAME);
89 Ok(())
90 }
91 #[test]
entry_point()92 fn entry_point() {
93 main().unwrap()
94 }
95
