--- /dev/null
+/*
+ * 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: Dec 17, 2001 */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <limits.h>
+#include "routines/tsa.h"
+
+#define WID_STR "Simple lowpass filter in the time domain"
+
+
+unsigned long length=ULONG_MAX,exclude=0;
+unsigned int column=1,iterations=1;
+unsigned int verbosity=0x1;
+char *outfile=NULL,stdo=1;
+char *infile=NULL;
+
+double *series,*new;
+
+void show_options(char *progname)
+{
+ what_i_do(progname,WID_STR);
+ fprintf(stderr,"Usage: %s [options]\n",progname);
+ fprintf(stderr,"Options:\n");
+ fprintf(stderr,"Everything not being a valid option will be interpreted"
+ " as a possible"
+ " datafile.\nIf no datafile is given stdin is read. Just - also"
+ " means stdin\n");
+ fprintf(stderr,"\t-l # of points to use [Default: whole file]\n");
+ fprintf(stderr,"\t-x # of lines to be ignored [Default: 0]\n");
+ fprintf(stderr,"\t-c column to read [Default: 1]\n");
+ fprintf(stderr,"\t-i # of iterations [Default: 1]\n");
+ fprintf(stderr,"\t-V verbosity level [Default: 1]\n\t\t"
+ "0='only panic messages'\n\t\t"
+ "1='+ input/output messages'\n\t\t"
+ "2='+ print each iteration to a separate file\n");
+ fprintf(stderr,"\t-o output file name(s) [Default: 'datafile'.low.n,\n\t\t"
+ "where n is the number of the iteration.\n\t\t"
+ "without -o the last iteration is written to stdout.]\n");
+ fprintf(stderr,"\t-h show these options\n");
+ exit(0);
+}
+
+void scan_options(int n,char **in)
+{
+ char *out;
+
+ if ((out=check_option(in,n,'l','u')) != NULL)
+ sscanf(out,"%lu",&length);
+ if ((out=check_option(in,n,'x','u')) != NULL)
+ sscanf(out,"%lu",&exclude);
+ if ((out=check_option(in,n,'c','u')) != NULL)
+ sscanf(out,"%u",&column);
+ if ((out=check_option(in,n,'i','u')) != NULL)
+ sscanf(out,"%u",&iterations);
+ if ((out=check_option(in,n,'V','d')) != NULL)
+ sscanf(out,"%d",&verbosity);
+ if ((out=check_option(in,n,'o','o')) != NULL) {
+ stdo=0;
+ if (strlen(out) > 0)
+ outfile=out;
+ }
+}
+
+int main(int argc,char **argv)
+{
+ char stdi=0;
+ char *ofname;
+ unsigned long i;
+ unsigned int iter;
+ FILE *file;
+
+ if (scan_help(argc,argv))
+ show_options(argv[0]);
+
+ scan_options(argc,argv);
+#ifndef OMIT_WHAT_I_DO
+ if (verbosity&VER_INPUT)
+ what_i_do(argv[0],WID_STR);
+#endif
+
+ infile=search_datafile(argc,argv,&column,verbosity);
+ if (infile == NULL)
+ stdi=1;
+
+ if (outfile == NULL) {
+ if (!stdi) {
+ check_alloc(outfile=(char*)calloc(strlen(infile)+5,(size_t)1));
+ check_alloc(ofname=(char*)calloc(strlen(infile)+9,(size_t)1));
+ sprintf(outfile,"%s.low",infile);
+ }
+ else {
+ check_alloc(outfile=(char*)calloc((size_t)10,(size_t)1));
+ check_alloc(ofname=(char*)calloc((size_t)14,(size_t)1));
+ sprintf(outfile,"stdin.low");
+ }
+ }
+ else
+ check_alloc(ofname=(char*)calloc(strlen(outfile)+10,(size_t)1));
+
+ series=(double*)get_series(infile,&length,exclude,column,verbosity);
+ check_alloc(new=(double*)malloc(sizeof(double)*length));
+
+ if (verbosity&VER_USR1) {
+ for (iter=1;iter<=iterations;iter++) {
+ new[0]=(2.0*series[0]+2.0*series[1])/4.0;
+ new[length-1]=(2.0*series[length-1]+2.0*series[length-2])/4.0;
+ for (i=1;i<length-1;i++)
+ new[i]=(series[i-1]+2.0*series[i]+series[i+1])/4.0;
+ sprintf(ofname,"%s.%d",outfile,iter);
+ test_outfile(ofname);
+ file=fopen(ofname,"w");
+ if (verbosity&VER_INPUT)
+ fprintf(stderr,"Opened %s for writing\n",ofname);
+ if (stdo && (iter == iterations)) {
+ if (verbosity&VER_INPUT)
+ fprintf(stderr,"Writing to stdout\n");
+ }
+ for (i=0;i<length;i++) {
+ if (stdo && (iter == iterations))
+ fprintf(stdout,"%e\n",series[i]=new[i]);
+ fprintf(file,"%e\n",series[i]=new[i]);
+ }
+ fclose(file);
+ }
+ }
+ else {
+ for (iter=1;iter<=iterations;iter++) {
+ new[0]=(2.0*series[0]+2.0*series[1])/4.0;
+ new[length-1]=(2.0*series[length-1]+2.0*series[length-2])/4.0;
+ for (i=1;i<length-1;i++)
+ new[i]=(series[i-1]+2.0*series[i]+series[i+1])/4.0;
+ for (i=0;i<length;i++)
+ series[i]=new[i];
+ }
+ if (!stdo) {
+ sprintf(ofname,"%s.%d",outfile,iterations);
+ file=fopen(ofname,"w");
+ if (verbosity&VER_INPUT)
+ fprintf(stderr,"Opened %s for writing\n",ofname);
+ for (i=0;i<length;i++)
+ fprintf(file,"%e\n",series[i]);
+ fclose(file);
+ }
+ else {
+ if (verbosity&VER_INPUT)
+ fprintf(stderr,"Writing to stdout\n");
+ for (i=0;i<length;i++)
+ fprintf(stdout,"%e\n",series[i]);
+ }
+ }
+
+ return 0;
+}
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