Macro extendr_api::prelude::modules::core::zipped
macro_rules! zipped { ($head: expr $(,)?) => { ... }; ($head: expr, $($tail: expr),* $(,)?) => { ... }; }
Expand description
Zips together matrix of the same size, so that coefficient-wise operations can be performed on their elements.
§Note
The order in which the matrix elements are traversed is unspecified.
§Example
use faer::{mat, unzipped, zipped, Mat};
let nrows = 2;
let ncols = 3;
let a = mat![[1.0, 3.0, 5.0], [2.0, 4.0, 6.0]];
let b = mat![[7.0, 9.0, 11.0], [8.0, 10.0, 12.0]];
let mut sum = Mat::<f64>::zeros(nrows, ncols);
zipped!(sum.as_mut(), a.as_ref(), b.as_ref()).for_each(|unzipped!(mut sum, a, b)| {
let a = a.read();
let b = b.read();
sum.write(a + b);
});
for i in 0..nrows {
for j in 0..ncols {
assert_eq!(sum.read(i, j), a.read(i, j) + b.read(i, j));
}
}