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