1 files changed, 94 insertions, 0 deletions
diff --git a/vendor/plotters/examples/chart.rs b/vendor/plotters/examples/chart.rs
new file mode 100644
index 000000000..acdddc3c1
--- /dev/null
+++ b/vendor/plotters/examples/chart.rs
@@ -0,0 +1,94 @@
+use plotters::prelude::*;
+
+const OUT_FILE_NAME: &'static str = "plotters-doc-data/sample.png";
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let root_area = BitMapBackend::new(OUT_FILE_NAME, (1024, 768)).into_drawing_area();
+
+    root_area.fill(&WHITE)?;
+
+    let root_area = root_area.titled("Image Title", ("sans-serif", 60))?;
+
+    let (upper, lower) = root_area.split_vertically(512);
+
+    let x_axis = (-3.4f32..3.4).step(0.1);
+
+    let mut cc = ChartBuilder::on(&upper)
+        .margin(5)
+        .set_all_label_area_size(50)
+        .caption("Sine and Cosine", ("sans-serif", 40))
+        .build_cartesian_2d(-3.4f32..3.4, -1.2f32..1.2f32)?;
+
+    cc.configure_mesh()
+        .x_labels(20)
+        .y_labels(10)
+        .disable_mesh()
+        .x_label_formatter(&|v| format!("{:.1}", v))
+        .y_label_formatter(&|v| format!("{:.1}", v))
+        .draw()?;
+
+    cc.draw_series(LineSeries::new(x_axis.values().map(|x| (x, x.sin())), &RED))?
+        .label("Sine")
+        .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &RED));
+
+    cc.draw_series(LineSeries::new(
+        x_axis.values().map(|x| (x, x.cos())),
+        &BLUE,
+    ))?
+    .label("Cosine")
+    .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], &BLUE));
+
+    cc.configure_series_labels().border_style(&BLACK).draw()?;
+
+    /*
+    // It's possible to use a existing pointing element
+     cc.draw_series(PointSeries::<_, _, Circle<_>>::new(
+        (-3.0f32..2.1f32).step(1.0).values().map(|x| (x, x.sin())),
+        5,
+        Into::<ShapeStyle>::into(&RGBColor(255,0,0)).filled(),
+    ))?;*/
+
+    // Otherwise you can use a function to construct your pointing element yourself
+    cc.draw_series(PointSeries::of_element(
+        (-3.0f32..2.1f32).step(1.0).values().map(|x| (x, x.sin())),
+        5,
+        ShapeStyle::from(&RED).filled(),
+        &|coord, size, style| {
+            EmptyElement::at(coord)
+                + Circle::new((0, 0), size, style)
+                + Text::new(format!("{:?}", coord), (0, 15), ("sans-serif", 15))
+        },
+    ))?;
+
+    let drawing_areas = lower.split_evenly((1, 2));
+
+    for (drawing_area, idx) in drawing_areas.iter().zip(1..) {
+        let mut cc = ChartBuilder::on(&drawing_area)
+            .x_label_area_size(30)
+            .y_label_area_size(30)
+            .margin_right(20)
+            .caption(format!("y = x^{}", 1 + 2 * idx), ("sans-serif", 40))
+            .build_cartesian_2d(-1f32..1f32, -1f32..1f32)?;
+        cc.configure_mesh()
+            .x_labels(5)
+            .y_labels(3)
+            .max_light_lines(4)
+            .draw()?;
+
+        cc.draw_series(LineSeries::new(
+            (-1f32..1f32)
+                .step(0.01)
+                .values()
+                .map(|x| (x, x.powf(idx as f32 * 2.0 + 1.0))),
+            &BLUE,
+        ))?;
+    }
+
+    // To avoid the IO failure being ignored silently, we manually call the present function
+    root_area.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()
+}