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Fix time axis scaling (fixes #35) 

Signed-off-by: Cees Bassa <cbassa@gmail.com>
master
Cees Bassa 2023-01-16 18:02:51 +01:00
parent 6018741c79
commit 68ddde792e
1 changed files with 20 additions and 13 deletions
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33
rfplot.c
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@ -823,6 +823,8 @@ void dec2sex(double x,char *s,int f,int len)
if (len==5) sprintf(s,"%c%02i%c%02i%c%05.2f%c",sign,(int) deg,form[f][0],(int) min,form[f][1],sec,form[f][2]);
if (len==4) sprintf(s,"%c%02i%c%02i%c%04.1f%c",sign,(int) deg,form[f][0],(int) min,form[f][1],sec,form[f][2]);
if (len==2) sprintf(s,"%c%02i%c%02i%c%02i%c",sign,(int) deg,form[f][0],(int) min,form[f][1],(int) floor(sec),form[f][2]);
if (len==1) sprintf(s,"%02i%c%02i%c%02i",(int) deg,form[f][0],(int) min,form[f][1],(int) floor(sec));
if (len==0) sprintf(s,"%02i%c%02i",(int) deg,form[f][0],(int) min,form[f][1]);
return;
}
@ -836,14 +838,14 @@ void time_axis(double *mjd,int n,float xmin,float xmax,float ymin,float ymax)
char stime[16];
// Find extrema
for (i=0;i<n;i++) {
if (i==0) {
mjdmin=mjd[i];
mjdmax=mjd[i];
} else {
if (mjd[i]>mjdmax) mjdmax=mjd[i];
}
}
imin=(int) xmin;
if (imin<0)
imin=0;
imax=(int) xmax;
if (imax>=n)
imax=n-1;
mjdmin=mjd[imin];
mjdmax=mjd[imax];
dt=(float) 86400*(mjdmax-mjdmin);
// Choose tickmarks
@ -862,11 +864,14 @@ void time_axis(double *mjd,int n,float xmin,float xmax,float ymin,float ymax)
} else if (dt>900) {
lsec=300;
ssec=60;
} else if (dt>300) {
lsec=120;
ssec=60;
} else {
lsec=60;
ssec=10;
lsec=20;
ssec=5;
}
// Extrema
tmin=86400.0*(mjdmin-floor(mjdmin));
tmax=tmin+dt;
@ -881,8 +886,10 @@ void time_axis(double *mjd,int n,float xmin,float xmax,float ymin,float ymax)
if (mjdt>=mjd[i] && mjdt<mjd[i+1])
break;
sec=(int) floor(fmod(t,86400.0));
dec2sex(((float) sec+0.1)/3600.0,stime,0,2);
stime[6]='\0';
if (dt < 300)
dec2sex(((float) sec+0.1)/3600.0,stime,0,1);
else
dec2sex(((float) sec+0.1)/3600.0,stime,0,0);
cpgtick(xmin,ymin,xmax,ymin,((float) i-xmin)/(xmax-xmin),0.5,0.5,0.3,0.0,stime);
}
}