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mspectral.c
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mspectral.c
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#include <math.h>
#include <stdio.h>
#include "interact.h"
/*
see also the period program in progs/src/misc !
*/
#include "period.h"
//
// analize data sequence with time in first column and y in second
// reads from stdin
//
void find_range(int *,int *,SPECA_PREC ,SPECA_PREC ,SPECA_PREC ,SPECA_PREC ,
SPECA_PREC *,SPECA_PREC *,SPECA_PREC *,int);
int main(int argc,char **argv)
{
SPECA_PREC *t,*xm,tmin,tmax,trange,hifac,ofac,f1,f2,*px,*py,prob,t1,t2,dt,
tmpt,tmpx,frange=0,fstep=0,fmid;
int i,n,np,it1,it2,nout,jmax,nadd,mode,fslide=0;
// oversampling factor
ofac=6.0;
// max frequency as fraction of nyquist frequency
hifac=0.75;
f1=0.25;
f2=0.75;
dt=0.75;
mode=1;
if(argc >= 2)
sscanf(argv[1],SPPF,&f1);
if(argc >= 3)
sscanf(argv[2],SPPF,&f2);
if(argc >= 4)
sscanf(argv[3],SPPF,&dt);
if(argc >= 5)
sscanf(argv[4],"%i",&mode);
if((f1<0) && (f2<0)){
fslide = 1;
fstep = -f1;
frange = -f2/2.0;
}
// read in times and moments of events
t=(SPECA_PREC *)malloc(sizeof(SPECA_PREC));
xm=(SPECA_PREC *)malloc(sizeof(SPECA_PREC));
n=0;i=1;nadd=0;
fprintf(stderr,"%s: reading t f(t) from stdin, min spacing dt: %g mode: %i\n",
argv[0],dt,mode);
while(fscanf(stdin,SPPF2,&tmpt,&tmpx)==2){
if(n>1){
while(tmpt > t[n-1]+dt){// fillin zeroes
t[n] =t[n-1]+dt;
xm[n]=0.0;
n++;i++;
t=(SPECA_PREC *)realloc(t,sizeof(SPECA_PREC)*i);
xm=(SPECA_PREC *)realloc(xm,sizeof(SPECA_PREC)*i);
if(!t || !xm)MEMERROR("mspectral, t xm");
nadd++;
}
}
t[n] =tmpt;
xm[n]=tmpx;
n++;i++;
t=(SPECA_PREC *)realloc(t,sizeof(SPECA_PREC)*i);
xm=(SPECA_PREC *)realloc(xm,sizeof(SPECA_PREC)*i);
if(!t || !xm)MEMERROR("mspectral, t xm");
}
t=(SPECA_PREC *)realloc(t,sizeof(SPECA_PREC)*n);
xm=(SPECA_PREC *)realloc(xm,sizeof(SPECA_PREC)*n);
tmin=t[0];tmax=t[n-1];trange=tmax-tmin;
fprintf(stderr,"%s: read in %i events from time %g to %g, added %i zeroes\n",
argv[0],n,tmin,tmax,nadd);
//
// workspace
//
np=(int)((ofac*hifac)/2.0*(SPECA_PREC)n+0.5)*22;
px=(SPECA_PREC *)malloc(sizeof(SPECA_PREC)*np);
py=(SPECA_PREC *)malloc(sizeof(SPECA_PREC)*np);
if(!px || !py)MEMERROR("mspectral, px, py");
it1=0;it2=n-1;
if(!fslide){
// analysis from f1 to f2 as fractions of the whole range,
// have to move inward from here
find_range(&it1,&it2,f1,f2,tmin,trange,t,&t1,&t2,n);
fprintf(stderr,"%s: calculating from %g (%g%%) to %g (%g%%) with %i samples\n",
argv[0],t1,f1*100.,t2,f2*100.,it2-it1+1);
if(mode == 0)
period((t+it1-1),(xm+it1-1),(it2-it1+1),ofac,hifac,(px-1),(py-1),np,&nout,
&jmax,&prob);
else
fasper((t+it1-1),(xm+it1-1),(it2-it1+1),ofac,hifac,(px-1),(py-1),np,&nout,
&jmax,&prob);
for(i=0;i<nout;i++)
fprintf(stdout,"%g %g\n",px[i],py[i]);
}else{
for(fmid=0.0;fmid<=1.0;fmid += fstep){
f1=fmid-frange;
f2=fmid+frange;
find_range(&it1,&it2,f1,f2,tmin,trange,t,&t1,&t2,n);
fprintf(stderr,"%s: calculating from %g (%g%%) to %g (%g%%) with %i samples\n",
argv[0],t1,f1*100.,t2,f2*100.,it2-it1+1);
if(mode == 0)
period((t+it1-1),(xm+it1-1),(it2-it1+1),ofac,hifac,(px-1),(py-1),np,&nout,
&jmax,&prob);
else
fasper((t+it1-1),(xm+it1-1),(it2-it1+1),ofac,hifac,(px-1),(py-1),np,&nout,
&jmax,&prob);
for(i=0;i<nout;i++)
fprintf(stdout,"%g %g %g\n",px[i],fmid,py[i]);
}
}
exit(0);
}
void find_range(int *it1,int *it2,SPECA_PREC f1,SPECA_PREC f2,
SPECA_PREC tmin,SPECA_PREC trange,
SPECA_PREC *t,SPECA_PREC *t1,SPECA_PREC *t2,
int n)
{
if(f1<0)f1=0.0;
if(f2>1)f2=1.0;
*t1=tmin+trange*f1;
*t2=tmin+trange*f2;
*it1=0;
*it2=n-1;
while(t[*it1]< *t1)
*it1 += 1;
while(t[*it2]> *t2)
*it2 -= 1;
}