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/*
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2008-2008 - INRIA - Allan SIMON
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
*/
#include "stdevf.h"
double dstdevfa(double *in1, int lines, int columns, double* in2)
{
int i = 0 ;
double meanf = dmeanfa (in1 , lines*columns , in2);
double temp = 0.0;
double accumulate = 0.0 ;
double accumulateFre = 0.0 ;
/*printf ("\nmeanf %lf \n" ,meanf);*/
/*equivalent to (in1 - meanf(x , in2 )).^2 .*in2 */
for(i = 0 ; i < lines*columns; ++i)
{
temp = dpows ( (in1[i] - meanf ) ,2 );
temp *= in2[i];
accumulate += temp ;
accumulateFre += in2[i];
}
if (lines <= 1)
{
return 0.0 * accumulate ;
}
else
{
return dsqrts(accumulate) / (accumulateFre - 1);
}
}
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