use crate::ArgminSignum;
use nalgebra::{
base::{allocator::Allocator, dimension::Dim},
DefaultAllocator, OMatrix, SimdComplexField,
};
impl<N, R, C> ArgminSignum for OMatrix<N, R, C>
where
N: SimdComplexField,
R: Dim,
C: Dim,
DefaultAllocator: Allocator<N, R, C>,
{
#[inline]
fn signum(self) -> OMatrix<N, R, C> {
self.map(|v| v.simd_signum())
}
}
#[cfg(test)]
mod tests {
use super::*;
use nalgebra::{Matrix2x3, Vector3};
use paste::item;
macro_rules! make_test {
($t:ty) => {
item! {
#[test]
fn [<test_signum_ $t>]() {
let a = Vector3::new(3 as $t, -4 as $t, -8 as $t);
let b = Vector3::new(1 as $t, -1 as $t, -1 as $t);
let res = <Vector3<$t> as ArgminSignum>::signum(a);
for i in 0..3 {
let diff = (b[i] as f64 - res[i] as f64).abs();
assert!(diff < std::f64::EPSILON);
}
}
}
item! {
#[test]
fn [<test_signum_scalar_mat_2_ $t>]() {
let b = Matrix2x3::new(
3 as $t, -4 as $t, 8 as $t,
-2 as $t, -5 as $t, 9 as $t
);
let target = Matrix2x3::new(
1 as $t, -1 as $t, 1 as $t,
-1 as $t, -1 as $t, 1 as $t
);
let res = b.signum();
for i in 0..3 {
for j in 0..2 {
assert!(((target[(j, i)] - res[(j, i)]) as f64).abs() < std::f64::EPSILON);
}
}
}
}
};
}
make_test!(f32);
make_test!(f64);
}