1 files changed, 43 insertions, 0 deletions
diff --git a/vendor/plotters/examples/histogram.rs b/vendor/plotters/examples/histogram.rs
new file mode 100644
index 000000000..5cda05dbe
--- /dev/null
+++ b/vendor/plotters/examples/histogram.rs
@@ -0,0 +1,43 @@
+use plotters::prelude::*;
+const OUT_FILE_NAME: &'static str = "plotters-doc-data/histogram.png";
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let root = BitMapBackend::new(OUT_FILE_NAME, (640, 480)).into_drawing_area();
+
+    root.fill(&WHITE)?;
+
+    let mut chart = ChartBuilder::on(&root)
+        .x_label_area_size(35)
+        .y_label_area_size(40)
+        .margin(5)
+        .caption("Histogram Test", ("sans-serif", 50.0))
+        .build_cartesian_2d((0u32..10u32).into_segmented(), 0u32..10u32)?;
+
+    chart
+        .configure_mesh()
+        .disable_x_mesh()
+        .bold_line_style(&WHITE.mix(0.3))
+        .y_desc("Count")
+        .x_desc("Bucket")
+        .axis_desc_style(("sans-serif", 15))
+        .draw()?;
+
+    let data = [
+        0u32, 1, 1, 1, 4, 2, 5, 7, 8, 6, 4, 2, 1, 8, 3, 3, 3, 4, 4, 3, 3, 3,
+    ];
+
+    chart.draw_series(
+        Histogram::vertical(&chart)
+            .style(RED.mix(0.5).filled())
+            .data(data.iter().map(|x: &u32| (*x, 1))),
+    )?;
+
+    // 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()
+}