1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
use plotters::prelude::*;
use rand::SeedableRng;
use rand_distr::{Distribution, Normal};
use rand_xorshift::XorShiftRng;
const OUT_FILE_NAME: &'static str = "plotters-doc-data/area-chart.png";
fn main() -> Result<(), Box<dyn std::error::Error>> {
let data: Vec<_> = {
let norm_dist = Normal::new(500.0, 100.0).unwrap();
let mut x_rand = XorShiftRng::from_seed(*b"MyFragileSeed123");
let x_iter = norm_dist.sample_iter(&mut x_rand);
x_iter
.filter(|x| *x < 1500.0)
.take(100)
.zip(0..)
.map(|(x, b)| x + (b as f64).powf(1.2))
.collect()
};
let root = BitMapBackend::new(OUT_FILE_NAME, (1024, 768)).into_drawing_area();
root.fill(&WHITE)?;
let mut chart = ChartBuilder::on(&root)
.set_label_area_size(LabelAreaPosition::Left, 60)
.set_label_area_size(LabelAreaPosition::Bottom, 60)
.caption("Area Chart Demo", ("sans-serif", 40))
.build_cartesian_2d(0..(data.len() - 1), 0.0..1500.0)?;
chart
.configure_mesh()
.disable_x_mesh()
.disable_y_mesh()
.draw()?;
chart.draw_series(
AreaSeries::new(
(0..).zip(data.iter()).map(|(x, y)| (x, *y)),
0.0,
&RED.mix(0.2),
)
.border_style(&RED),
)?;
// To avoid the IO failure being ignored silently, we manually call the present function
root.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
println!("Result has been saved to {}", OUT_FILE_NAME);
Ok(())
}
#[test]
fn entry_point() {
main().unwrap()
}
|
