From db464f35f5a10b58d9ed1085e0b462689adee583 Mon Sep 17 00:00:00 2001
From: Siddhesh Wani
Date: Mon, 25 May 2015 14:46:31 +0530
Subject: Original Version
---
src/c/statisticsFunctions/stdevf/cstdevfa.c | 43 +++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 src/c/statisticsFunctions/stdevf/cstdevfa.c
(limited to 'src/c/statisticsFunctions/stdevf/cstdevfa.c')
diff --git a/src/c/statisticsFunctions/stdevf/cstdevfa.c b/src/c/statisticsFunctions/stdevf/cstdevfa.c
new file mode 100644
index 00000000..5b1631f1
--- /dev/null
+++ b/src/c/statisticsFunctions/stdevf/cstdevfa.c
@@ -0,0 +1,43 @@
+/*
+ * 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"
+
+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);
+ 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)
+ {
+ temp = cpows ( cdiffs (in1[i] , meanf ) ,FloatComplex (2.0f, 0.0f ) );
+ temp = cmuls( in2[i] , temp);
+
+ accumulate = cadds( temp , accumulate);
+ accumulateFre = cadds (in2[i] ,accumulateFre );
+
+ }
+
+ if (lines <= 1)
+ {
+ return cmuls (FloatComplex(0.0f,0.0f) , accumulate ) ;
+ }
+ else
+ {
+ accumulate = crdivs (accumulate , cdiffs (accumulateFre ,FloatComplex(1.0f,0.0f)) );
+ return csqrts(accumulate);
+ }
+}
--
cgit