1 files changed, 62 insertions, 0 deletions
diff --git a/vendor/plotters/examples/matshow.rs b/vendor/plotters/examples/matshow.rs
new file mode 100644
index 000000000..30c71a745
--- /dev/null
+++ b/vendor/plotters/examples/matshow.rs
@@ -0,0 +1,62 @@
+use plotters::prelude::*;
+
+const OUT_FILE_NAME: &'static str = "plotters-doc-data/matshow.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 mut chart = ChartBuilder::on(&root)
+        .caption("Matshow Example", ("sans-serif", 80))
+        .margin(5)
+        .top_x_label_area_size(40)
+        .y_label_area_size(40)
+        .build_cartesian_2d(0i32..15i32, 15i32..0i32)?;
+
+    chart
+        .configure_mesh()
+        .x_labels(15)
+        .y_labels(15)
+        .max_light_lines(4)
+        .x_label_offset(35)
+        .y_label_offset(25)
+        .disable_x_mesh()
+        .disable_y_mesh()
+        .label_style(("sans-serif", 20))
+        .draw()?;
+
+    let mut matrix = [[0; 15]; 15];
+
+    for i in 0..15 {
+        matrix[i][i] = i + 4;
+    }
+
+    chart.draw_series(
+        matrix
+            .iter()
+            .zip(0..)
+            .map(|(l, y)| l.iter().zip(0..).map(move |(v, x)| (x as i32, y as i32, v)))
+            .flatten()
+            .map(|(x, y, v)| {
+                Rectangle::new(
+                    [(x, y), (x + 1, y + 1)],
+                    HSLColor(
+                        240.0 / 360.0 - 240.0 / 360.0 * (*v as f64 / 20.0),
+                        0.7,
+                        0.1 + 0.4 * *v as f64 / 20.0,
+                    )
+                    .filled(),
+                )
+            }),
+    )?;
+
+    // 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()
+}