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bugfix h2linspace

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Magnus Ulimoen
2020-04-13 00:23:55 +02:00
parent cde8755c15
commit a58892044d
1 changed files with 5 additions and 4 deletions
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9
sbp/src/utils.rs
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@@ -294,18 +294,19 @@ pub fn json_to_vortex(mut json: JsonValue) -> super::euler::VortexParameters {
} }
pub fn h2linspace(start: Float, end: Float, n: usize) -> ndarray::Array1<Float> { pub fn h2linspace(start: Float, end: Float, n: usize) -> ndarray::Array1<Float> {
let h = 1.0 / (n - 2) as Float; let h = (end - start) / (n - 2) as Float;
ndarray::Array1::from_shape_fn(n, |i| match i { ndarray::Array1::from_shape_fn(n, |i| match i {
0 => start, 0 => start,
i if i == n - 1 => end, i if i == n - 1 => end,
i => h * (i as Float - 0.5), i => start + h * (i as Float - 0.5),
}) })
} }
#[test] #[test]
fn test_h2linspace() { fn test_h2linspace() {
let x = h2linspace(0.0, 1.0, 50); let x = h2linspace(-1.0, 1.0, 50);
approx::assert_abs_diff_eq!(x[0], 0.0, epsilon = 1e-6); println!("{}", x);
approx::assert_abs_diff_eq!(x[0], -1.0, epsilon = 1e-6);
approx::assert_abs_diff_eq!(x[49], 1.0, epsilon = 1e-6); approx::assert_abs_diff_eq!(x[49], 1.0, epsilon = 1e-6);
let hend = x[1] - x[0]; let hend = x[1] - x[0];
let h = x[2] - x[1]; let h = x[2] - x[1];