2 * This file is part of TISEAN
4 * Copyright (c) 1998-2007 Rainer Hegger, Holger Kantz, Thomas Schreiber
6 * TISEAN is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * TISEAN is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with TISEAN; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 /*Author: Rainer Hegger Last modified: May 23th, 1998 */
24 #include "tisean_cec.h"
26 void variance(double *s,unsigned long l,double *av,double *var)
39 *var=sqrt(fabs((*var)/(double)l-(*av)*(*av)));
41 fprintf(stderr,"Variance of the data is zero. Exiting!\n\n");
42 exit(VARIANCE_VAR_EQ_ZERO);