1 files changed, 60 insertions, 0 deletions
diff --git a/vendor/plotters/examples/two-scales.rs b/vendor/plotters/examples/two-scales.rs
new file mode 100644
index 000000000..6e1dfa4c2
--- /dev/null
+++ b/vendor/plotters/examples/two-scales.rs
@@ -0,0 +1,60 @@
+use plotters::prelude::*;
+
+const OUT_FILE_NAME: &'static str = "plotters-doc-data/twoscale.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)
+        .x_label_area_size(35)
+        .y_label_area_size(40)
+        .right_y_label_area_size(40)
+        .margin(5)
+        .caption("Dual Y-Axis Example", ("sans-serif", 50.0).into_font())
+        .build_cartesian_2d(0f32..10f32, (0.1f32..1e10f32).log_scale())?
+        .set_secondary_coord(0f32..10f32, -1.0f32..1.0f32);
+
+    chart
+        .configure_mesh()
+        .disable_x_mesh()
+        .disable_y_mesh()
+        .y_desc("Log Scale")
+        .y_label_formatter(&|x| format!("{:e}", x))
+        .draw()?;
+
+    chart
+        .configure_secondary_axes()
+        .y_desc("Linear Scale")
+        .draw()?;
+
+    chart
+        .draw_series(LineSeries::new(
+            (0..=100).map(|x| (x as f32 / 10.0, (1.02f32).powf(x as f32 * x as f32 / 10.0))),
+            &BLUE,
+        ))?
+        .label("y = 1.02^x^2")
+        .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &BLUE));
+
+    chart
+        .draw_secondary_series(LineSeries::new(
+            (0..=100).map(|x| (x as f32 / 10.0, (x as f32 / 5.0).sin())),
+            &RED,
+        ))?
+        .label("y = sin(2x)")
+        .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &RED));
+
+    chart
+        .configure_series_labels()
+        .background_style(&RGBColor(128, 128, 128))
+        .draw()?;
+
+    // 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()
+}