gslice::gslice

gslice ();
gslice (size_t start, const valarray<size_t>& lengths, const valarray<size_t>& strides);
gslice (const gslice& gslc);

gslice constructor

Parameters

start

Index of the first element in the generalized slice.
The index of the first element in a valarray is 0, not 1.
size_t is an unsigned integral type.

lengths

valarray object with each element representing the number of elements in each dimension of the slice.
size_t is an unsigned integral type.

strides

valarray object with each element representing the separation between the elements (dimension size).
size_t is an unsigned integral type.

gslc

gslice object (copy constructor).

Example

// gslice example
#include <iostream>
#include <valarray>
using namespace std;
int main ()
{
  valarray<int> foo (14);
  for (int i=0; i<14; ++i) foo[i]=i;
  size_t start=1;
  size_t lengths[]= {2,3};
  size_t strides[]= {7,2};
  gslice mygslice (start,valarray<size_t>(lengths,2),valarray<size_t>(strides,2));
  valarray<int> bar = foo[mygslice];
  cout << "gslice: ";
  for (size_t n=0; n<bar.size(); n++)
	  cout << bar[n] << ' ';
  cout << endl;
  return 0;
}

gslice: 1 3 5 8 10 12

See also