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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"
floatComplex cstdevfa(floatComplex *in1, int lines, int columns, floatComplex* in2)
{
int i = 0 ;
floatComplex temp = FloatComplex(0.0f,0.0f);
floatComplex accumulate = FloatComplex(0.0f,0.0f);
floatComplex accumulateFre = FloatComplex(0.0f,0.0f);
floatComplex meanf = cmeanfa (in1 , lines*columns , in2);
/*equivalent to (in1 - meanf(x , in2 )).^2 .*in2 */
for(i = 0 ; i < lines*columns ; ++i)
{
temp = cpows ( cdiffs (in1[i] , meanf ) ,FloatComplex (2.0f, 0.0f ) );
temp = cmuls( in2[i] , temp);
accumulate = cadds( temp , accumulate);
accumulateFre = cadds (in2[i] ,accumulateFre );
}
if (lines <= 1)
{
return cmuls (FloatComplex(0.0f,0.0f) , accumulate ) ;
}
else
{
accumulate = crdivs (accumulate , cdiffs (accumulateFre ,FloatComplex(1.0f,0.0f)) );
return csqrts(accumulate);
}
}
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