+++ /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 */
-/*Changes:
- Feb 19, 2007: changed meaning of -f flag and added -P flag to be
- consistent with spectrum
- Dec 5, 2006: Seg fault when poles > length;
- */
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <limits.h>
-#include "routines/tsa.h"
-#include <math.h>
-
-#define WID_STR "Estimates the power spectrum of the data"
-
-#ifndef M_PI
-#define M_PI 3.1415926535897932385E0
-#endif
-
-unsigned long poles=128,out=2000;
-unsigned long length=ULONG_MAX,exclude=0;
-unsigned int column=1;
-unsigned int verbosity=0x1;
-double samplingrate=1.0;
-char *outfile=NULL,stdo=1;
-char *infile=NULL;
-double *series;
-
-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 length of file [default is whole file]\n");
- fprintf(stderr,"\t-x # of lines to be ignored [default is 0]\n");
- fprintf(stderr,"\t-c column to read [default is 1]\n");
- fprintf(stderr,"\t-p number of poles [default is 128 or file length]\n");
- fprintf(stderr,"\t-P number of frequences out [default is 2000]\n");
- fprintf(stderr,"\t-f sampling rate in Hz [default is 1]\n");
- fprintf(stderr,"\t-o outfile [default is 'datafile'.spec]\n");
- fprintf(stderr,"\t-V verbosity level [default is 1]\n\t\t"
- "0='only panic messages'\n\t\t"
- "1='+ input/output messages'\n\t\t"
- "2='+ print the ar coefficients too'\n");
- fprintf(stderr,"\t-h show these options\n\n");
- exit(0);
-}
-
-void scan_options(int argc,char **argv)
-{
- char *hout;
-
- if ((hout=check_option(argv,argc,'l','u')) != NULL)
- sscanf(hout,"%lu",&length);
- if ((hout=check_option(argv,argc,'x','u')) != NULL)
- sscanf(hout,"%lu",&exclude);
- if ((hout=check_option(argv,argc,'c','u')) != NULL)
- sscanf(hout,"%u",&column);
- if ((hout=check_option(argv,argc,'p','u')) != NULL)
- sscanf(hout,"%lu",&poles);
- if ((hout=check_option(argv,argc,'P','u')) != NULL)
- sscanf(hout,"%lu",&out);
- if ((hout=check_option(argv,argc,'f','f')) != NULL)
- sscanf(hout,"%lf",&samplingrate);
- if ((hout=check_option(argv,argc,'V','u')) != NULL)
- sscanf(hout,"%u",&verbosity);
- if ((hout=check_option(argv,argc,'o','o')) != NULL) {
- stdo=0;
- if (strlen(hout) > 0)
- outfile=hout;
- }
-}
-
-double getcoefs(double *coef)
-{
- long i,j,hp=(long)poles-1;
- double ret=0.0,*cov,*help,h1,h2;
-
- check_alloc(cov=(double*)malloc(sizeof(double)*length));
- check_alloc(help=(double*)malloc(sizeof(double)*poles));
-
- for (i=0;i<length;i++)
- ret += series[i]*series[i];
- ret /= length;
-
- for (i=0;i<length;i++)
- cov[i]=series[i];
- series++;
-
- for (i=0;i<poles;i++) {
- h1=h2=0.0;
- for (j=0;j<length-i-1;j++) {
- h1 += cov[j]*series[j];
- h2 += cov[j]*cov[j]+series[j]*series[j];
- }
- coef[i]=2.0*h1/h2;
- ret *= (1.0-coef[i]*coef[i]);
- for (j=0;j<i;j++)
- coef[j]=help[j]-coef[i]*help[i-1-j];
- if (i == hp)
- break;
- for (j=0;j<=i;j++)
- help[j]=coef[j];
- for (j=0;j<length-i-1;j++) {
- cov[j] -= help[i]*series[j];
- series[j]=series[j+1]-help[i]*cov[j+1];
- }
- }
- free(cov);
- free(help);
-
- return ret;
-}
-double powcoef(double dt,double *coef)
-{
- int i;
- double si=0.0,sr=1.0,zr=1.0,zi=0.0,h,omdt,hr,hi;
-
- omdt=2.0*M_PI*dt;
- hr=cos(omdt);
- hi=sin(omdt);
-
- for (i=0;i<poles;i++) {
- h=zr;
- zr=zr*hr-zi*hi;
- zi=h*hi+zi*hr;
- sr -= coef[i]*zr;
- si -= coef[i]*zi;
- }
- return (sr*sr+si*si);
-}
-
-int main(int argc,char **argv)
-{
- char stdi=0;
- double fdt,pm,pow_spec,*cof,av,var;
- long i;
- FILE *fout;
-
- 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)+6,(size_t)1));
- strcpy(outfile,infile);
- strcat(outfile,".spec");
- }
- else {
- check_alloc(outfile=(char*)calloc((size_t)11,(size_t)1));
- strcpy(outfile,"stdin.spec");
- }
- }
- if (!stdo)
- test_outfile(outfile);
-
- series=(double*)get_series(infile,&length,exclude,column,verbosity);
-
- if (length <= poles) {
- fprintf(stderr,"\n\tNo. of poles has to be smaller then the length of the\n"
- "\tdata set! Exiting.\n");
- exit(MEM_SPEC_TOO_MANY_POLES);
- }
-
- variance(series,length,&av,&var);
- for (i=0;i<length;i++)
- series[i] -= av;
-
- check_alloc(cof=(double*)malloc(sizeof(double)*poles));
-
- pm=getcoefs(cof);
-
- if (!stdo) {
- fout=fopen(outfile,"w");
- if (verbosity&VER_INPUT)
- fprintf(stderr,"Opened %s for writing\n",outfile);
- if (verbosity&VER_USR1) {
- fprintf(fout,"#sigma^2=%e\n",pm);
- for (i=0;i<poles;i++)
- fprintf(fout,"#%ld %e\n",i+1,cof[i]);
- }
- for(i=0;i<out;i++) {
- fdt=i/(2.0*out);
- pow_spec=powcoef(fdt,cof);
- fprintf(fout,"%e %e\n",fdt*samplingrate,
- pm/pow_spec/sqrt((double)length));
- fflush(fout);
- }
- fclose(fout);
- }
- else {
- if (verbosity&VER_INPUT)
- fprintf(stderr,"Writing to stdout\n");
- if (verbosity&VER_USR1) {
- fprintf(stdout,"#sigma^2=%e\n",pm);
- for (i=0;i<poles;i++)
- fprintf(stdout,"#%ld %e\n",i+1,cof[i]);
- }
- for(i=0;i<out;i++) {
- fdt=i/(2.0*out);
- pow_spec=powcoef(fdt,cof);
- fprintf(stdout,"%e %e\n",fdt*samplingrate,
- pm/pow_spec/*/sqrt((double)length)*/);
- }
- }
-
- return 0;
-}
-
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