55 lines
1.6 KiB
Rust
55 lines
1.6 KiB
Rust
use plotters::prelude::*;
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use rand::SeedableRng;
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use rand_distr::{Distribution, Normal};
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use rand_xorshift::XorShiftRng;
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const OUT_FILE_NAME: &'static str = "plotters-doc-data/area-chart.png";
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let data: Vec<_> = {
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let norm_dist = Normal::new(500.0, 100.0).unwrap();
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let mut x_rand = XorShiftRng::from_seed(*b"MyFragileSeed123");
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let x_iter = norm_dist.sample_iter(&mut x_rand);
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x_iter
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.filter(|x| *x < 1500.0)
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.take(100)
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.zip(0..)
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.map(|(x, b)| x + (b as f64).powf(1.2))
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.collect()
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};
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let root = BitMapBackend::new(OUT_FILE_NAME, (1024, 768)).into_drawing_area();
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root.fill(&WHITE)?;
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let mut chart = ChartBuilder::on(&root)
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.set_label_area_size(LabelAreaPosition::Left, 60)
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.set_label_area_size(LabelAreaPosition::Bottom, 60)
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.caption("Area Chart Demo", ("sans-serif", 40))
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.build_cartesian_2d(0..(data.len() - 1), 0.0..1500.0)?;
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chart
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.configure_mesh()
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.disable_x_mesh()
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.disable_y_mesh()
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.draw()?;
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chart.draw_series(
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AreaSeries::new(
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(0..).zip(data.iter()).map(|(x, y)| (x, *y)),
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0.0,
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&RED.mix(0.2),
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)
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.border_style(&RED),
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)?;
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// To avoid the IO failure being ignored silently, we manually call the present function
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root.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
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println!("Result has been saved to {}", OUT_FILE_NAME);
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Ok(())
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}
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#[test]
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fn entry_point() {
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main().unwrap()
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}
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