Original Version

1 files changed, 43 insertions, 0 deletions

diff --git a/src/c/statisticsFunctions/stdevf/dstdevfa.c b/src/c/statisticsFunctions/stdevf/dstdevfa.c
new file mode 100644
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+++ b/src/c/statisticsFunctions/stdevf/dstdevfa.c
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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);
+      }
+}