added variancef functions but *(row|column)variance* don't work are waiting some clarity about how they works in scilab

added the corresponding interface and unitary test

1 files changed, 36 insertions, 0 deletions

diff --git a/src/c/statisticsFunctions/variancef/cvariancefa.c b/src/c/statisticsFunctions/variancef/cvariancefa.c
new file mode 100644
index 00000000..71f29be8
--- /dev/null
+++ b/src/c/statisticsFunctions/variancef/cvariancefa.c
@@ -0,0 +1,36 @@
+/*
+ *  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 "division.h"
+
+floatComplex cvariancefa(floatComplex *in1, int size, floatComplex *in2)
+
+{
+  int i = 0 ;
+  floatComplex temp = FloatComplex (0.0f, 0.0f );
+  floatComplex accumulate =FloatComplex (0.0f, 0.0f );
+  float accumulateFre = 0.0f;
+
+  floatComplex meanf = cmeanfa (in1 , size , in2);
+  //printf("\n\tComplex meanf result : %lf \t+ %lf i " ,creals( meanf) ,cimags( meanf)) ;
+  for(i = 0 ; i < size ; ++i)
+    {
+     temp = cpows (  cdiffs (in1[i] , meanf ) ,FloatComplex (2.0f, 0.0f ) );
+     temp = cmuls( in2[i] , temp);
+     //printf("\n\tComplex accumulate : %lf \t+ %lf i   " ,creals(temp) ,cimags(temp)) ;
+     accumulate = cadds( temp , accumulate);
+     accumulateFre +=  creals(in2[i]);
+    }
+//printf("\n\tComplex division result : %lf \t+ %lf i / %lf  " ,creals(accumulate) ,cimags(accumulate),accumulateFre) ;
+  return FloatComplex( creals(accumulate) /(accumulateFre -1),  cimags(accumulate) /(accumulateFre -1)); 
+}