Trait sprs::vec::SparseIterTools
source · pub trait SparseIterTools: Iterator {
// Provided methods
fn nnz_or_zip<'a, I, N1, N2>(
self,
other: I,
) -> NnzOrZip<'a, Self, I::IntoIter, N1, N2> ⓘ
where Self: Iterator<Item = (usize, &'a N1)> + Sized,
I: IntoIterator<Item = (usize, &'a N2)> { ... }
fn nnz_zip<'a, I, N1, N2>(
self,
other: I,
) -> FilterMap<NnzOrZip<'a, Self, I::IntoIter, N1, N2>, fn(_: NnzEither<'a, N1, N2>) -> Option<(usize, &'a N1, &'a N2)>>
where Self: Iterator<Item = (usize, &'a N1)> + Sized,
I: IntoIterator<Item = (usize, &'a N2)> { ... }
}
Provided Methods§
sourcefn nnz_or_zip<'a, I, N1, N2>(
self,
other: I,
) -> NnzOrZip<'a, Self, I::IntoIter, N1, N2> ⓘ
fn nnz_or_zip<'a, I, N1, N2>( self, other: I, ) -> NnzOrZip<'a, Self, I::IntoIter, N1, N2> ⓘ
Iterate over non-zero elements of either of two vectors. This is useful for implementing eg addition of vectors.
§Example
use sprs::CsVec;
use sprs::vec::NnzEither;
use sprs::vec::SparseIterTools;
let v0 = CsVec::new(5, vec![0, 2, 4], vec![1., 2., 3.]);
let v1 = CsVec::new(5, vec![1, 2, 3], vec![-1., -2., -3.]);
let mut nnz_or_iter = v0.iter().nnz_or_zip(v1.iter());
assert_eq!(nnz_or_iter.next(), Some(NnzEither::Left((0, &1.))));
assert_eq!(nnz_or_iter.next(), Some(NnzEither::Right((1, &-1.))));
assert_eq!(nnz_or_iter.next(), Some(NnzEither::Both((2, &2., &-2.))));
assert_eq!(nnz_or_iter.next(), Some(NnzEither::Right((3, &-3.))));
assert_eq!(nnz_or_iter.next(), Some(NnzEither::Left((4, &3.))));
assert_eq!(nnz_or_iter.next(), None);
sourcefn nnz_zip<'a, I, N1, N2>(
self,
other: I,
) -> FilterMap<NnzOrZip<'a, Self, I::IntoIter, N1, N2>, fn(_: NnzEither<'a, N1, N2>) -> Option<(usize, &'a N1, &'a N2)>>
fn nnz_zip<'a, I, N1, N2>( self, other: I, ) -> FilterMap<NnzOrZip<'a, Self, I::IntoIter, N1, N2>, fn(_: NnzEither<'a, N1, N2>) -> Option<(usize, &'a N1, &'a N2)>>
Iterate over the matching non-zero elements of both vectors Useful for vector dot product.
§Example
use sprs::CsVec;
use sprs::vec::SparseIterTools;
let v0 = CsVec::new(5, vec![0, 2, 4], vec![1., 2., 3.]);
let v1 = CsVec::new(5, vec![1, 2, 3], vec![-1., -2., -3.]);
let mut nnz_zip = v0.iter().nnz_zip(v1.iter());
assert_eq!(nnz_zip.next(), Some((2, &2., &-2.)));
assert_eq!(nnz_zip.next(), None);