1 files changed, 46 insertions, 0 deletions
diff --git a/src/c/statisticsFunctions/variancef/svariancefa.c b/src/c/statisticsFunctions/variancef/svariancefa.c
new file mode 100644
index 00000000..f49d2b38
--- /dev/null
+++ b/src/c/statisticsFunctions/variancef/svariancefa.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 "variancef.h" 
+
+/*
+s_moyennepond = meanf(x, fre)
+s_ecartmoyenne = x - s_moyennepond
+s_ecartcarre  = s_ecartmoyenne.^2 
+s_ecartcarrepondere = s_ecartcarre .* fre
+s = sum( s_ecartcarrepondere )/(sumfre - 1), 
+*/
+float svariancefa(float *in1, int size, float* in2)
+{
+  int i = 0 ;
+  float temp = 0.0f;
+  float accumulate = 0.0f ;
+  float accumulateFre = 0.0f ;
+
+  float meanf = smeanfa (in1 , size , in2);
+  /*printf ("\nmeanf %lf \n" ,meanf);*/
+  for(i = 0 ; i < size ; ++i)
+    {
+     
+     temp = spows (  (in1[i]  - meanf ) ,2 );
+     temp *= in2[i];
+
+     accumulate += temp ;
+     accumulateFre += in2[i];
+
+
+    }
+
+  return accumulate / (accumulateFre - 1) ;
+}
+
+