criterion/plot/plotters_backend/
t_test.rs

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1use super::*;
2use crate::report::ComparisonData;
3use std::path::Path;
4
5pub(crate) fn t_test(
6    path: &Path,
7    title: &str,
8    comparison: &ComparisonData,
9    size: Option<(u32, u32)>,
10) {
11    let t = comparison.t_value;
12    let (xs, ys) = kde::sweep(&comparison.t_distribution, KDE_POINTS, None);
13
14    let x_range = plotters::data::fitting_range(xs.iter());
15    let mut y_range = plotters::data::fitting_range(ys.iter());
16    y_range.start = 0.0;
17    y_range.end *= 1.1;
18
19    let root_area = SVGBackend::new(&path, size.unwrap_or(SIZE)).into_drawing_area();
20
21    let mut chart = ChartBuilder::on(&root_area)
22        .margin((5).percent())
23        .caption(format!("{}: Welch t test", title), (DEFAULT_FONT, 20))
24        .set_label_area_size(LabelAreaPosition::Left, (5).percent_width().min(60))
25        .set_label_area_size(LabelAreaPosition::Bottom, (5).percent_height().min(40))
26        .build_cartesian_2d(x_range, y_range.clone())
27        .unwrap();
28
29    chart
30        .configure_mesh()
31        .disable_mesh()
32        .y_desc("Density")
33        .x_desc("t score")
34        .draw()
35        .unwrap();
36
37    chart
38        .draw_series(AreaSeries::new(
39            xs.iter().zip(ys.iter()).map(|(x, y)| (*x, *y)),
40            0.0,
41            DARK_BLUE.mix(0.25),
42        ))
43        .unwrap()
44        .label("t distribution")
45        .legend(|(x, y)| {
46            Rectangle::new([(x, y - 5), (x + 20, y + 5)], DARK_BLUE.mix(0.25).filled())
47        });
48
49    chart
50        .draw_series(std::iter::once(PathElement::new(
51            vec![(t, 0.0), (t, y_range.end)],
52            DARK_BLUE.filled().stroke_width(2),
53        )))
54        .unwrap()
55        .label("t statistic")
56        .legend(|(x, y)| PathElement::new(vec![(x, y), (x + 20, y)], DARK_BLUE));
57
58    chart.configure_series_labels().draw().unwrap();
59}
criterion/plot/plotters_backend/t_test.rs

criterion/plot/plotters_backend/
t_test.rs
