1 files changed, 66 insertions, 0 deletions
diff --git a/vendor/plotters/examples/normal-dist.rs b/vendor/plotters/examples/normal-dist.rs
new file mode 100644
index 000000000..be4878630
--- /dev/null
+++ b/vendor/plotters/examples/normal-dist.rs
@@ -0,0 +1,66 @@
+use plotters::prelude::*;
+
+use rand::SeedableRng;
+use rand_distr::{Distribution, Normal};
+use rand_xorshift::XorShiftRng;
+
+const OUT_FILE_NAME: &'static str = "plotters-doc-data/normal-dist.png";
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let root = BitMapBackend::new(OUT_FILE_NAME, (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)?;
+
+    // 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()
+}