Mac binaries

[jabaws.git] / website / archive / binaries / mac / src / disembl / Tisean_3.0.1 / source_c / routines / variance.c

diff --git a/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_c/routines/variance.c b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_c/routines/variance.c
new file mode 100644 (file)
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+++ b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_c/routines/variance.c
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+/*
+ *   This file is part of TISEAN
+ *
+ *   Copyright (c) 1998-2007 Rainer Hegger, Holger Kantz, Thomas Schreiber
+ *
+ *   TISEAN is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   TISEAN is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with TISEAN; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+/*Author: Rainer Hegger Last modified: May 23th, 1998 */
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "tisean_cec.h"
+
+void variance(double *s,unsigned long l,double *av,double *var)
+{
+  unsigned long i;
+  double h;
+  
+  *av= *var=0.0;
+
+  for (i=0;i<l;i++) {
+    h=s[i];
+    *av += h;
+    *var += h*h;
+  }
+  *av /= (double)l;
+  *var=sqrt(fabs((*var)/(double)l-(*av)*(*av)));
+  if (*var == 0.0) {
+    fprintf(stderr,"Variance of the data is zero. Exiting!\n\n");
+    exit(VARIANCE_VAR_EQ_ZERO);
+  }
+}
+