Original Version

1 files changed, 47 insertions, 0 deletions

diff --git a/src/c/statisticsFunctions/variancef/scolumnvariancefa.c b/src/c/statisticsFunctions/variancef/scolumnvariancefa.c
new file mode 100644
index 0000000..a0283aa
--- /dev/null
+++ b/src/c/statisticsFunctions/variancef/scolumnvariancefa.c
@@ -0,0 +1,47 @@
+/*
+ *  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"
+#include "meanf.h"
+
+
+void scolumnvariancefa(float *in1, int lines, int columns, float *in2, float* out){
+  int i = 0;
+  int j = 0;
+  float temp = 0.0f;
+  float accumulate = 0.0f;
+  float accumulateFre = 0.0f ;
+    
+  scolumnmeanfa(in1, lines, columns, in2, out );
+
+  
+  /*we first multiply each cell of the input matrix by its coefficient*/
+  for (j = 0; j < lines; ++j)
+    {
+      accumulate = 0.0f;
+      accumulateFre= 0.0f;
+      temp = 0.0f;
+
+      for ( i = 0 ; i < columns; ++i )
+        {
+         temp = spows (  (in1[lines*i + j]  - out[j] ) ,2 );
+         temp *= in2[lines*i + j];
+
+         accumulate += temp ;
+         accumulateFre += in2[lines*i + j];
+        } 
+      out[j] = accumulate / (accumulateFre - 1) ;
+    }
+
+}
+