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Valarray slice selector
This class represents a valarray slice selector. It does not contain any element - it only describes a selection of elements in a valarray to be used as an index in valarray::operator[] .
A valarray slice is specified by a starting index, a size, and a stride.
The starting index (start) is the index of the first element in the selection.
The size (size) is the number of elements in the selection.
The stride (stride) is the separation between the elements in the valarray that are selected.
Therefore, a slice with a stride higher than 1 does not select contiguous elements in the valarray; For example, slice(3,4,5) selects the elements 3, 8, 13 and 18.
Members
| slice::size | Return size of slice (public member function) |
Example
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// slice example
#include <iostream>
#include <valarray>
using namespace std;
int main ()
{
valarray<int> foo (12);
for (int i=0; i<12; ++i) foo[i]=i;
valarray<int> bar = foo[slice(2,3,4)];
cout << "slice(2,3,4): ";
for (size_t n=0; n<bar.size(); n++)
cout << bar[n] << ' ';
cout << endl;
return 0;
}
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Output
See also
| gslice | Valarray generalized slice selector (class) |
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