1 use plotters::prelude::*;
2
3 const OUT_FILE_NAME: &'static str = "plotters-doc-data/twoscale.png";
main() -> Result<(), Box<dyn std::error::Error>>4 fn main() -> Result<(), Box<dyn std::error::Error>> {
5 let root = BitMapBackend::new(OUT_FILE_NAME, (1024, 768)).into_drawing_area();
6 root.fill(&WHITE)?;
7
8 let mut chart = ChartBuilder::on(&root)
9 .x_label_area_size(35)
10 .y_label_area_size(40)
11 .right_y_label_area_size(40)
12 .margin(5)
13 .caption("Dual Y-Axis Example", ("sans-serif", 50.0).into_font())
14 .build_cartesian_2d(0f32..10f32, (0.1f32..1e10f32).log_scale())?
15 .set_secondary_coord(0f32..10f32, -1.0f32..1.0f32);
16
17 chart
18 .configure_mesh()
19 .disable_x_mesh()
20 .disable_y_mesh()
21 .y_desc("Log Scale")
22 .y_label_formatter(&|x| format!("{:e}", x))
23 .draw()?;
24
25 chart
26 .configure_secondary_axes()
27 .y_desc("Linear Scale")
28 .draw()?;
29
30 chart
31 .draw_series(LineSeries::new(
32 (0..=100).map(|x| (x as f32 / 10.0, (1.02f32).powf(x as f32 * x as f32 / 10.0))),
33 &BLUE,
34 ))?
35 .label("y = 1.02^x^2")
36 .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &BLUE));
37
38 chart
39 .draw_secondary_series(LineSeries::new(
40 (0..=100).map(|x| (x as f32 / 10.0, (x as f32 / 5.0).sin())),
41 &RED,
42 ))?
43 .label("y = sin(2x)")
44 .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &RED));
45
46 chart
47 .configure_series_labels()
48 .background_style(&RGBColor(128, 128, 128))
49 .draw()?;
50
51 // To avoid the IO failure being ignored silently, we manually call the present function
52 root.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
53 println!("Result has been saved to {}", OUT_FILE_NAME);
54
55 Ok(())
56 }
57 #[test]
entry_point()58 fn entry_point() {
59 main().unwrap()
60 }
61
