\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)

valvector_element

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Accessing Elements of a valvector

Returns a reference to the specified element of this valvector.

Prototype

   scalar_type& operator[](size_t j)
   const scalar_type& operator[](size_t j) const

j

This is the index of the element we are accessing.

1. If the size this valvector is one, j can have any value and the return is the single element in this valvector.

2. If the size of this valvector is not one, j must be less than its size and the return is the j-th element in this valvector.

Example

The file valvector_element.cpp is an example and test of valvector element access.