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std::valarray<T>::shift

From cppreference.com
< cpp‎ | numeric‎ | valarray
 
 
 
 
valarray<T> shift( int count ) const;

Returns a new valarray of the same size with elements whose positions are shifted by count elements. The new position of each element is i−count where i is the previous position. The value of shifted in elements is T().

Contents

[edit] Parameters

count - number of positions to shift the elements by

[edit] Return value

The resulting valarray with shifted elements.

[edit] Notes

The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:

[edit] Example

#include <iostream>
#include <valarray>
 
int main()
{
    std::valarray<int> v{1, 2, 3, 4, 5, 6, 7, 8};
 
    for (auto const& val : v)
        std::cout << val << ' ';
    std::cout << '\n';
 
    std::valarray<int> v2 = v.shift(2);
 
    for (auto const& val : v2)
        std::cout << val << ' ';
    std::cout << '\n';
}

Output:

1 2 3 4 5 6 7 8 
3 4 5 6 7 8 0 0

[edit] See also

circular shift of the elements of the valarray
(public member function) [edit]