Improve line labels

Author: kili-ilo

examples/hello_world.jpg

@@ -11,10 +11,10 @@ config =
         width: 1024,
         height: 768,
         lines: [
-            { name: "sine", color: blue, points: sin },
             { name: "cosine", color: green, points: cos },
-            { name: "sine2", color: red, points: sin2 },
-            { name: "cosine2", color: cyan, points: cos2 },
+            { name: "cosine x 2", color: cyan, points: cosX2 },
+            { name: "sine", color: blue, points: sin },
+            { name: "sine x 2", color: red, points: sinX2 },
         ],
     }
 
@@ -23,5 +23,5 @@ ok = \r -> Result.withDefault r 0
 domain = List.range -100 101 |> List.map (\i -> pi * (Num.toFloat i) / 100 |> ok)
 cos = domain |> List.map (\x -> P2 x (Num.cos x))
 sin = domain |> List.map (\x -> P2 x (Num.sin x))
-cos2 = domain |> List.map (\x -> P2 x (2 * Num.cos x))
-sin2 = domain |> List.map (\x -> P2 x (2 * Num.sin x))
+cosX2 = domain |> List.map (\x -> P2 x (2 * Num.cos x))
+sinX2 = domain |> List.map (\x -> P2 x (2 * Num.sin x))

examples/hello_world.png

@@ -58,7 +58,7 @@ fn plot_with<Backend: DrawingBackend>(
         let v: Vec<(f64, f64)> = line.points.iter().map(|point| (point.x, point.y)).collect();
         let color = RGBColor(line.color.r, line.color.g, line.color.b);
         cc.draw_series(LineSeries::new(v, color))?
-            .label(format!("Line {:?}", line.name))
+            .label(line.name.as_str())
             .legend(move |(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], color));
     }
     cc.configure_series_labels().border_style(&BLACK).draw()?;