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63 lines
2.0 KiB
63 lines
2.0 KiB
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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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let root =
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BitMapBackend::new("plotters-doc-data/normal-dist.png", (1024, 768)).into_drawing_area();
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root.fill(&WHITE)?;
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let sd = 0.13;
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let random_points: Vec<(f64, f64)> = {
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let norm_dist = Normal::new(0.5, sd).unwrap();
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let mut x_rand = XorShiftRng::from_seed(*b"MyFragileSeed123");
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let mut y_rand = XorShiftRng::from_seed(*b"MyFragileSeed321");
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let x_iter = norm_dist.sample_iter(&mut x_rand);
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let y_iter = norm_dist.sample_iter(&mut y_rand);
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x_iter.zip(y_iter).take(5000).collect()
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};
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let areas = root.split_by_breakpoints([944], [80]);
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let mut x_hist_ctx = ChartBuilder::on(&areas[0])
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.y_label_area_size(40)
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.build_cartesian_2d((0.0..1.0).step(0.01).use_round().into_segmented(), 0..250)?;
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let mut y_hist_ctx = ChartBuilder::on(&areas[3])
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.x_label_area_size(40)
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.build_cartesian_2d(0..250, (0.0..1.0).step(0.01).use_round())?;
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let mut scatter_ctx = ChartBuilder::on(&areas[2])
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.x_label_area_size(40)
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.y_label_area_size(40)
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.build_cartesian_2d(0f64..1f64, 0f64..1f64)?;
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scatter_ctx
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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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scatter_ctx.draw_series(
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random_points
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.iter()
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.map(|(x, y)| Circle::new((*x, *y), 2, GREEN.filled())),
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)?;
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let x_hist = Histogram::vertical(&x_hist_ctx)
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.style(GREEN.filled())
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.margin(0)
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.data(random_points.iter().map(|(x, _)| (*x, 1)));
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let y_hist = Histogram::horizontal(&y_hist_ctx)
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.style(GREEN.filled())
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.margin(0)
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.data(random_points.iter().map(|(_, y)| (*y, 1)));
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x_hist_ctx.draw_series(x_hist)?;
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y_hist_ctx.draw_series(y_hist)?;
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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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