1 files changed, 54 insertions, 0 deletions
diff --git a/vendor/plotters/examples/area-chart.rs b/vendor/plotters/examples/area-chart.rs
new file mode 100644
index 000000000..5b1a7a5a5
--- /dev/null
+++ b/vendor/plotters/examples/area-chart.rs
@@ -0,0 +1,54 @@
+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()
+}