A sub-vector with the elements at given positions.

This is a template function with two overwrites:

template<class VectorValues, class VectorPositions> inline VectorValues At(VectorValues const& v, VectorPositions const& positions);

template<class VectorValues> inline VectorValues At(VectorValues const& v, bvec const& mask);

The template argument VectorValues must be an index-able class, such as std::vector; the template argument VectorPositions must have a forward iterator.

Arguments

v	a const& to a VectorValues object.
positions	a const& to VectorPositions object. The elements in positions must be convertible to indices in v.
mask	a bvec const& of the same length as v with elements equal to true at the positions to be returned.

Value

a VectorValues object.

See also

SPLITT

Other global functions: SPLITT::IsNA, SPLITT::Match, SPLITT::NotIsNA, SPLITT::Seq, SPLITT::SortIndices