ocmath_d_copy

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 header to Include
9 Reference

Description

Copy a vector of type double with given array of indices.

Syntax

void ocmath_d_copy( uint nPts, const uint * pIndices, double * pDestX, const double * pSrcX, int nSrcSize )

Parameters

nPts: [input] size of pIndices arrays, must be smaller then the size of pSrcX.
pIndices: [input] array of indices to copy from pSrcX to pDestX, the largest; element of this array must be smaller then the size of pDestX.
pDestX: [output] destination vector, must be SetSize to nPts.
pSrcX: [input] source vector, must be SetSize to at least the largest element in pIndices.
nSrcSize: [input] the size of source vector.

Return

There is nothing to return, It is assumed that caller will prepare all the

pointers and arrays such that they are all in the valid range, as this

function does not check for errors.

Examples

EX1

#include <Origin.h>
#include <ocmath.h>
void ocmath_d_copy_ex1()
{
    vector vd = {1,1.1, 2 ,2.1, 3,3.1,4,4.1,5,5.1};
    vector<uint> vnIndices = {0,2,4,6,8};
    vector vDestX;
    bool bRet = vDestX.SetSize(vnIndices.GetSize());
    
    if(!bRet)
        return ;
    ocmath_d_copy(vnIndices.GetSize(), vnIndices,vDestX, vd, vd.GetSize() );
    //vDestX should have data of : 1, 2, 3, 4, 5
}