1 use plotters::prelude::*;
2 const OUT_FILE_NAME: &'static str = "plotters-doc-data/histogram.png";
main() -> Result<(), Box<dyn std::error::Error>>3 fn main() -> Result<(), Box<dyn std::error::Error>> {
4 let root = BitMapBackend::new(OUT_FILE_NAME, (640, 480)).into_drawing_area();
5
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 .margin(5)
12 .caption("Histogram Test", ("sans-serif", 50.0))
13 .build_cartesian_2d((0u32..10u32).into_segmented(), 0u32..10u32)?;
14
15 chart
16 .configure_mesh()
17 .disable_x_mesh()
18 .bold_line_style(&WHITE.mix(0.3))
19 .y_desc("Count")
20 .x_desc("Bucket")
21 .axis_desc_style(("sans-serif", 15))
22 .draw()?;
23
24 let data = [
25 0u32, 1, 1, 1, 4, 2, 5, 7, 8, 6, 4, 2, 1, 8, 3, 3, 3, 4, 4, 3, 3, 3,
26 ];
27
28 chart.draw_series(
29 Histogram::vertical(&chart)
30 .style(RED.mix(0.5).filled())
31 .data(data.iter().map(|x: &u32| (*x, 1))),
32 )?;
33
34 // To avoid the IO failure being ignored silently, we manually call the present function
35 root.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
36 println!("Result has been saved to {}", OUT_FILE_NAME);
37
38 Ok(())
39 }
40 #[test]
entry_point()41 fn entry_point() {
42 main().unwrap()
43 }
44
