LHS: return iterator instead of Array2 #277
Description
Hi there,
I am currently using egobox for its implementation of the Latin-Hypercube algorithm. The sample(n_points: usize) method returns a fully-allocated Array2<_> and internally uses two Array2<_> of the same size for constructing it. My problem is that with 10_000 sampled points, the memory allocation is quite large and I do not use the produced Array2<_> but simply turn it into an iterator over the individual points.
My question is if there are any plans to support this kind of use-case. The most straight-forward approach would be to extend the SamplingMethod trait.
pub trait SamplingMethod<F: Float> {
fn sampling_space(&self) -> &Array2<F>;
fn normalized_sample(&self, ns: usize) -> Array2<F>;
fn sample(&self, ns: usize) -> Array2<F>;
// New methods
fn normalized_sample_iter(&self, ns: usize) -> impl IntoIterator<Item = Array1<F>>;
fn sample_iter(&self, ns: usize) -> impl IntoIterator<Item = Array1<F>>;