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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()
}
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