Function rgsl::sort::select::sort_smallest

pub fn sort_smallest(
    dest: &mut [f64], 
    k: usize, 
    src: &[f64], 
    stride: usize
) -> Value

This function copies the k smallest elements of the array src, of size n and stride stride, in ascending numerical order into the array dest. The size k of the subset must be less than or equal to n. The data src is not modified by this operation.