added stdevf functions , interfaces , header, tests , everything

1 files changed, 9 insertions, 7 deletions

diff --git a/src/c/statisticsFunctions/stdevf/cstdevfa.c b/src/c/statisticsFunctions/stdevf/cstdevfa.c
index 63ce3948..5b1631f1 100644
--- a/src/c/statisticsFunctions/stdevf/cstdevfa.c
+++ b/src/c/statisticsFunctions/stdevf/cstdevfa.c
@@ -15,9 +15,10 @@
 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);
-  float accumulateFre = 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)
@@ -26,16 +27,17 @@ floatComplex cstdevfa(floatComplex *in1, int lines, int columns, floatComplex* i
      temp = cmuls( in2[i] , temp);
 
      accumulate = cadds( temp , accumulate);
-     accumulateFre +=  creals(in2[i]);
-    }
+     accumulateFre =  cadds (in2[i] ,accumulateFre );
+
+     } 
 
-    if (lines <= 1)
+     if (lines <= 1)
       {
-        return cmuls (FloatComplex(0.0f,0.0f) , accumulate ) ; 
+        return  cmuls (FloatComplex(0.0f,0.0f) , accumulate ) ; 
       }
-    else
+     else
       {
-        accumulate = FloatComplex(  creals(accumulate ) / (accumulateFre - 1) , cimags(accumulate)  / (accumulateFre - 1));
+        accumulate =   crdivs (accumulate , cdiffs (accumulateFre ,FloatComplex(1.0f,0.0f))   );
         return csqrts(accumulate);
       }
 }