static void plot_harmonics(double rr, int zoomlevel, fftpart * fp)
{
int ii, hh;
double offsetf;
char label[20];
fftview *harmview;
cpgsubp(4, 4);
for (ii = 0, hh = 2; ii < 8; ii++, hh++) {
cpgpanl(ii % 4 + 1, ii / 4 + 1);
harmview = get_harmonic(hh * rr, zoomlevel, fp);
if (harmview != NULL) {
offsetf = plot_fftview(harmview, 0.0, 2.0, hh * rr, 2);
snprintf(label, 20, "Harmonic %d", hh);
cpgsave();
cpgsch(2.0);
cpgmtxt("T", -1.8, 0.05, 0.0, label);
cpgunsa();
free(harmview);
}
}
for (ii = 8, hh = 2; ii < 16; ii++, hh++) {
cpgpanl(ii % 4 + 1, ii / 4 + 1);
harmview = get_harmonic(rr / (double) hh, zoomlevel, fp);
if (harmview != NULL) {
offsetf = plot_fftview(harmview, 0.0, 2.0, rr / (double) hh, 2);
snprintf(label, 20, "Harmonic 1/%d", hh);
cpgsave();
cpgsch(2.0);
cpgmtxt("T", -1.8, 0.05, 0.0, label);
cpgunsa();
free(harmview);
}
}
cpgsubp(1, 1);
cpgpanl(1, 1);
cpgsvp(0.0, 1.0, 0.0, 1.0);
cpgswin(2.0, 6.0, -2.0, 2.0);
cpgmove(2.0, 0.0);
cpgslw(3);
cpgdraw(6.0, 0.0);
cpgslw(1);
}
static void demo3()
{
#define TWOPI (2.0*3.14159265)
#define NPOL 6
int i, j, k;
int n1[] = {3, 4, 5, 5, 6, 8};
int n2[] = {1, 1, 1, 2, 1, 3};
float x[10], y[10], y0;
char* lab[] = {"Fill style 1 (solid)",
"Fill style 2 (outline)",
"Fill style 3 (hatched)",
"Fill style 4 (cross-hatched)"};
/* Initialize the viewport and window. */
cpgbbuf();
cpgsave();
cpgpage();
cpgsvp(0.0, 1.0, 0.0, 1.0);
cpgwnad(0.0, 10.0, 0.0, 10.0);
/* Label the graph. */
cpgsci(1);
cpgmtxt("T", -2.0, 0.5, 0.5,
"PGPLOT fill area: routines cpgpoly(), cpgcirc(), cpgrect()");
/* Draw assorted polygons. */
for (k=1; k<5; k++) {
cpgsci(1);
y0 = 10.0 -2.0*k;
cpgtext(0.2, y0+0.6, lab[k-1]);
cpgsfs(k);
for (i=0; i<NPOL; i++) {
cpgsci(i+1);
for (j=0; j<n1[i]; j++) {
x[j] = i+1 + 0.5*cos(n2[i]*TWOPI*j/n1[i]);
y[j] = y0 + 0.5*sin(n2[i]*TWOPI*j/n1[i]);
}
cpgpoly(n1[i], x, y);
}
cpgsci(7);
cpgshs(0.0, 1.0, 0.0);
cpgcirc(7.0, y0, 0.5);
cpgsci(8);
cpgshs(-45.0, 1.0, 0.0);
cpgrect(7.8, 9.5, y0-0.5, y0+0.5);
}
cpgunsa();
cpgebuf();
return;
}
static int plot_dataview(dataview * dv, float minval, float maxval, float charhgt)
/* The return value is offsetn */
{
int ii, lon, hin, offsetn = 0, tmpn;
double lot, hit, offsett = 0.0;
float ns[MAXDISPNUM], hiavg[MAXDISPNUM], loavg[MAXDISPNUM];
float scalemin = 0.0, scalemax = 0.0, dscale;
cpgsave();
cpgbbuf();
/* Set the "Normal" plotting attributes */
cpgsls(1);
cpgslw(1);
cpgsch(charhgt);
cpgsci(1);
cpgvstd();
/* Autoscale for the maximum value */
if (maxval > 0.5 * LARGENUM)
scalemax = dv->maxval;
else
scalemax = maxval;
/* Autoscale for the minimum value */
if (minval < 0.5 * SMALLNUM)
scalemin = dv->minval;
else
scalemin = minval;
dscale = 0.1 * (scalemax - scalemin);
if (maxval > 0.5 * LARGENUM)
maxval = scalemax + dscale;
if (minval < 0.5 * SMALLNUM)
minval = scalemin - dscale;
lon = dv->lon;
lot = lon * idata.dt;
hin = lon + dv->numsamps;
hit = hin * idata.dt;
/* Time Labels (top of box) */
if ((hit - lot) / hit < 0.001) {
int numchar;
char label[50];
offsett = 0.5 * (hit + lot);
numchar = snprintf(label, 50, "Time - %.15g (s)", offsett);
cpgmtxt("T", 2.5, 0.5, 0.5, label);
} else {
cpgmtxt("T", 2.5, 0.5, 0.5, "Time (s)");
}
cpgswin(lot - offsett, hit - offsett, minval, maxval);
cpgbox("CMST", 0.0, 0, "", 0.0, 0);
/* Sample number labels */
if (lon > 10000000 || (double) (hin - lon) / (double) hin < 0.001) {
int numchar;
char label[50];
offsetn = (lon / 10000) * 10000;
numchar = snprintf(label, 50, "Sample - %d", offsetn);
cpgmtxt("B", 2.8, 0.5, 0.5, label);
} else {
cpgmtxt("B", 2.8, 0.5, 0.5, "Sample");
}
cpgswin(lon - offsetn, hin - offsetn, minval, maxval);
cpgbox("BNST", 0.0, 0, "BCNST", 0.0, 0);
/* Plot the rawdata if required */
tmpn = lon - offsetn;
if (plotstats == 0 || plotstats == 2) {
if (dv->zoomlevel > 0) {
for (ii = 0; ii < dv->dispnum; ii++)
ns[ii] = tmpn + ii;
cpgbin(dv->dispnum, ns, dv->vals, 0);
} else { /* Plot the min/max values */
for (ii = 0; ii < dv->numchunks; ii++, tmpn += dv->chunklen) {
cpgmove((float) tmpn, dv->mins[ii]);
cpgdraw((float) tmpn, dv->maxs[ii]);
}
}
}
/* Plot the other statistics if requested */
if (plotstats == 0 || plotstats == 1) {
tmpn = lon - offsetn;
for (ii = 0; ii < dv->numchunks; ii++, tmpn += dv->chunklen) {
ns[ii] = tmpn;
hiavg[ii] = dv->avgmeds[ii] + dv->stds[ii];
loavg[ii] = dv->avgmeds[ii] - dv->stds[ii];
}
if (dv->numchunks > 512) {
if (plotstats == 1) {
cpgline(dv->numchunks, ns, dv->mins);
cpgline(dv->numchunks, ns, dv->maxs);
}
cpgsci(AVGMED_COLOR);
cpgline(dv->numchunks, ns, dv->avgmeds);
if (usemedian)
cpgmtxt("T", -1.4, 0.02, 0.0, "Median");
else
cpgmtxt("T", -1.4, 0.02, 0.0, "Average");
cpgsci(STDDEV_COLOR);
cpgline(dv->numchunks, ns, hiavg);
cpgline(dv->numchunks, ns, loavg);
cpgmtxt("T", -2.6, 0.02, 0.0, "+/- 1 Std Dev");
} else {
if (plotstats == 1) {
cpgbin(dv->numchunks, ns, dv->mins, 0);
cpgbin(dv->numchunks, ns, dv->maxs, 0);
}
cpgsci(AVGMED_COLOR);
cpgbin(dv->numchunks, ns, dv->avgmeds, 0);
if (usemedian)
cpgmtxt("T", -1.4, 0.02, 0.0, "Median");
else
cpgmtxt("T", -1.4, 0.02, 0.0, "Average");
cpgsci(STDDEV_COLOR);
cpgbin(dv->numchunks, ns, hiavg, 0);
cpgbin(dv->numchunks, ns, loavg, 0);
cpgmtxt("T", -2.6, 0.02, 0.0, "+/- 1 Std Dev");
}
}
cpgsci(1);
cpgmtxt("L", 2.5, 0.5, 0.5, "Sample Value");
cpgebuf();
cpgunsa();
return offsetn;
}
static double plot_fftview(fftview * fv, float maxpow, float charhgt,
float vertline, int vertline_color)
/* The return value is offsetf */
{
int ii;
double lor, lof, hir, hif, offsetf = 0.0;
float *freqs;
cpgsave();
cpgbbuf();
/* Set the "Normal" plotting attributes */
cpgsls(1);
cpgslw(1);
cpgsch(charhgt);
cpgsci(1);
cpgvstd();
if (maxpow == 0.0) /* Autoscale for the maximum value */
maxpow = 1.1 * fv->maxpow;
lor = fv->lor;
lof = lor / T;
hir = lor + fv->dr * DISPLAYNUM;
hif = hir / T;
offsetf = 0.0;
/* Period Labels */
if (fv->zoomlevel >= 0 && lof > 1.0) {
double lop, hip, offsetp = 0.0;
lop = 1.0 / lof;
hip = 1.0 / hif;
offsetp = 0.0;
if ((lop - hip) / hip < 0.001) {
int numchar;
char label[50];
offsetp = 0.5 * (hip + lop);
numchar = snprintf(label, 50, "Period - %.15g (s)", offsetp);
cpgmtxt("T", 2.5, 0.5, 0.5, label);
} else {
cpgmtxt("T", 2.5, 0.5, 0.5, "Period (s)");
}
cpgswin(lop - offsetp, hip - offsetp, 0.0, maxpow);
cpgbox("CIMST", 0.0, 0, "", 0.0, 0);
}
/* Frequency Labels */
if ((hif - lof) / hif < 0.001) {
int numchar;
char label[50];
offsetf = 0.5 * (hif + lof);
numchar = snprintf(label, 50, "Frequency - %.15g (Hz)", offsetf);
cpgmtxt("B", 2.8, 0.5, 0.5, label);
} else {
cpgmtxt("B", 2.8, 0.5, 0.5, "Frequency (Hz)");
}
cpgswin(lof - offsetf, hif - offsetf, 0.0, maxpow);
/* Add zapboxes if required */
if (numzaplist) {
double zaplo, zaphi;
cpgsave();
cpgsci(15);
cpgsfs(1);
for (ii = 0; ii < numzaplist; ii++) {
zaplo = zaplist[ii].lobin;
zaphi = zaplist[ii].hibin;
if ((zaplo < hir && zaplo > lor) || (zaphi < hir && zaphi > lor)) {
cpgrect(zaplo / T - offsetf, zaphi / T - offsetf, 0.0, 0.95 * maxpow);
}
}
cpgunsa();
}
/* Add a background vertical line if requested */
if (vertline != 0.0 && vertline_color != 0) {
cpgsave();
cpgsci(vertline_color);
cpgmove(vertline / T - offsetf, 0.0);
cpgdraw(vertline / T - offsetf, maxpow);
cpgunsa();
}
if (fv->zoomlevel >= 0 && lof > 1.0)
cpgbox("BINST", 0.0, 0, "BCNST", 0.0, 0);
else
cpgbox("BCINST", 0.0, 0, "BCNST", 0.0, 0);
/* Plot the spectrum */
freqs = gen_fvect(DISPLAYNUM);
for (ii = 0; ii < DISPLAYNUM; ii++)
freqs[ii] = fv->rs[ii] / T - offsetf;
if (fv->zoomlevel > 0) { /* Magnified power spectrum */
cpgline(DISPLAYNUM, freqs, fv->powers);
} else { /* Down-sampled power spectrum */
for (ii = 0; ii < DISPLAYNUM; ii++) {
cpgmove(freqs[ii], 0.0);
cpgdraw(freqs[ii], fv->powers[ii]);
}
}
vect_free(freqs);
cpgmtxt("L", 2.5, 0.5, 0.5, "Normalized Power");
cpgebuf();
cpgunsa();
return offsetf;
}
int main(int argc, char *argv[])
{
float maxpow = 0.0, inx = 0.0, iny = 0.0;
double centerr, offsetf;
int zoomlevel, maxzoom, minzoom, xid, psid;
char *rootfilenm, inchar;
fftpart *lofp;
fftview *fv;
if (argc == 1) {
printf("\nusage: explorefft fftfilename\n\n");
exit(0);
}
printf("\n\n");
printf(" Interactive FFT Explorer\n");
printf(" by Scott M. Ransom\n");
printf(" October, 2001\n");
print_help();
{
int hassuffix = 0;
char *suffix;
hassuffix = split_root_suffix(argv[1], &rootfilenm, &suffix);
if (hassuffix) {
if (strcmp(suffix, "fft") != 0) {
printf("\nInput file ('%s') must be a FFT file ('.fft')!\n\n", argv[1]);
free(suffix);
exit(0);
}
free(suffix);
} else {
printf("\nInput file ('%s') must be a FFT file ('.fft')!\n\n", argv[1]);
exit(0);
}
}
/* Read the info file */
readinf(&idata, rootfilenm);
if (strlen(remove_whitespace(idata.object)) > 0) {
printf("Examining %s data from '%s'.\n\n",
remove_whitespace(idata.object), argv[1]);
} else {
printf("Examining data from '%s'.\n\n", argv[1]);
}
N = idata.N;
T = idata.dt * idata.N;
#ifdef USEMMAP
printf("Memory mapping the input FFT. This may take a while...\n");
mmap_file = open(argv[1], O_RDONLY);
{
int rt;
struct stat buf;
rt = fstat(mmap_file, &buf);
if (rt == -1) {
perror("\nError in fstat() in explorefft.c");
printf("\n");
exit(-1);
}
Nfft = buf.st_size / sizeof(fcomplex);
}
lofp = get_fftpart(0, Nfft);
#else
{
int numamps;
fftfile = chkfopen(argv[1], "rb");
Nfft = chkfilelen(fftfile, sizeof(fcomplex));
numamps = (Nfft > MAXBINS) ? (int) MAXBINS : (int) Nfft;
lofp = get_fftpart(0, numamps);
}
#endif
/* Plot the initial data */
{
int initnumbins = INITIALNUMBINS;
if (initnumbins > Nfft) {
initnumbins = next2_to_n(Nfft) / 2;
zoomlevel = LOGDISPLAYNUM - (int) (log(initnumbins) / log(2.0));
minzoom = zoomlevel;
} else {
zoomlevel = LOGDISPLAYNUM - LOGINITIALNUMBINS;
minzoom = LOGDISPLAYNUM - LOGMAXBINS;
}
maxzoom = LOGDISPLAYNUM - LOGMINBINS;
centerr = initnumbins / 2;
}
fv = get_fftview(centerr, zoomlevel, lofp);
/* Prep the XWIN device for PGPLOT */
xid = cpgopen("/XWIN");
if (xid <= 0) {
free(fv);
#ifdef USEMMAP
close(mmap_file);
#else
fclose(fftfile);
#endif
free_fftpart(lofp);
exit(EXIT_FAILURE);
}
cpgscr(15, 0.4, 0.4, 0.4);
cpgask(0);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
do {
cpgcurs(&inx, &iny, &inchar);
if (DEBUGOUT)
printf("You pressed '%c'\n", inchar);
switch (inchar) {
case 'A': /* Zoom in */
case 'a':
centerr = (inx + offsetf) * T;
case 'I':
case 'i':
if (DEBUGOUT)
printf(" Zooming in (zoomlevel = %d)...\n", zoomlevel);
if (zoomlevel < maxzoom) {
zoomlevel++;
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
} else
printf(" Already at maximum zoom level (%d).\n", zoomlevel);
break;
case 'X': /* Zoom out */
case 'x':
case 'O':
case 'o':
if (DEBUGOUT)
printf(" Zooming out (zoomlevel = %d)...\n", zoomlevel);
if (zoomlevel > minzoom) {
zoomlevel--;
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
} else
printf(" Already at minimum zoom level (%d).\n", zoomlevel);
break;
case '<': /* Shift left 1 full screen */
centerr -= fv->numbins + fv->numbins / 8;
case ',': /* Shift left 1/8 screen */
if (DEBUGOUT)
printf(" Shifting left...\n");
centerr -= fv->numbins / 8;
{ /* Should probably get the previous chunk from the fftfile... */
double lowestr;
lowestr = 0.5 * fv->numbins;
if (centerr < lowestr)
centerr = lowestr;
}
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
break;
case '>': /* Shift right 1 full screen */
centerr += fv->numbins - fv->numbins / 8;
case '.': /* Shift right 1/8 screen */
if (DEBUGOUT)
printf(" Shifting right...\n");
centerr += fv->numbins / 8;
{ /* Should probably get the next chunk from the fftfile... */
double highestr;
highestr = lofp->rlo + lofp->numamps - 0.5 * fv->numbins;
if (centerr > highestr)
centerr = highestr;
}
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
break;
case '+': /* Increase height of powers */
case '=':
if (maxpow == 0.0) {
printf(" Auto-scaling is off.\n");
maxpow = 1.1 * fv->maxpow;
}
maxpow = 3.0 / 4.0 * maxpow;
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
break;
case '-': /* Decrease height of powers */
case '_':
if (maxpow == 0.0) {
printf(" Auto-scaling is off.\n");
maxpow = 1.1 * fv->maxpow;
}
maxpow = 4.0 / 3.0 * maxpow;
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
break;
case 'S': /* Auto-scale */
case 's':
if (maxpow == 0.0)
break;
else {
printf(" Auto-scaling is on.\n");
maxpow = 0.0;
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
break;
}
case 'G': /* Goto a frequency */
case 'g':
{
char freqstr[50];
double freq = -1.0;
while (freq < 0.0) {
printf(" Enter the frequency (Hz) to go to:\n");
fgets(freqstr, 50, stdin);
freqstr[strlen(freqstr) - 1] = '\0';
freq = atof(freqstr);
}
offsetf = 0.0;
centerr = freq * T;
printf(" Moving to frequency %.15g.\n", freq);
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, centerr, 2);
}
break;
case 'H': /* Show harmonics */
case 'h':
{
double retval;
retval = harmonic_loop(xid, centerr, zoomlevel, lofp);
if (retval > 0.0) {
offsetf = 0.0;
centerr = retval;
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, centerr, 2);
}
}
break;
case '?': /* Print help screen */
print_help();
break;
case 'D': /* Show details about a selected point */
case 'd':
{
double newr;
printf(" Searching for peak near freq = %.7g Hz...\n", (inx + offsetf));
newr = find_peak(inx + offsetf, fv, lofp);
centerr = newr;
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, centerr, 2);
}
break;
case 'L': /* Load a zaplist */
case 'l':
{
int ii, len;
char filename[200];
double *lobins, *hibins;
printf(" Enter the filename containing the zaplist to load:\n");
fgets(filename, 199, stdin);
len = strlen(filename) - 1;
filename[len] = '\0';
numzaplist = get_birdies(filename, T, 0.0, &lobins, &hibins);
lenzaplist = numzaplist + 20; /* Allow some room to add more */
if (lenzaplist)
free(zaplist);
zaplist = (bird *) malloc(sizeof(bird) * lenzaplist);
for (ii = 0; ii < numzaplist; ii++) {
zaplist[ii].lobin = lobins[ii];
zaplist[ii].hibin = hibins[ii];
}
vect_free(lobins);
vect_free(hibins);
printf("\n");
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
}
break;
case 'Z': /* Add a birdie to a zaplist */
case 'z':
{
int badchoice = 2;
float lox, hix, loy, hiy;
double rs[2];
char choice;
if (numzaplist + 1 > lenzaplist) {
lenzaplist += 10;
zaplist = (bird *) realloc(zaplist, sizeof(bird) * lenzaplist);
}
cpgqwin(&lox, &hix, &loy, &hiy);
printf(" Click the left mouse button on the first frequency limit.\n");
while (badchoice) {
cpgcurs(&inx, &iny, &choice);
if (choice == 'A' || choice == 'a') {
rs[2 - badchoice] = ((double) inx + offsetf) * T;
cpgsave();
cpgsci(7);
cpgmove(inx, 0.0);
cpgdraw(inx, hiy);
cpgunsa();
badchoice--;
if (badchoice == 1)
printf
(" Click the left mouse button on the second frequency limit.\n");
} else {
printf(" Option not recognized.\n");
}
};
if (rs[1] > rs[0]) {
zaplist[numzaplist].lobin = rs[0];
zaplist[numzaplist].hibin = rs[1];
} else {
zaplist[numzaplist].lobin = rs[1];
zaplist[numzaplist].hibin = rs[0];
}
printf(" The new birdie has: f_avg = %.15g f_width = %.15g\n\n",
0.5 * (zaplist[numzaplist].hibin + zaplist[numzaplist].lobin) / T,
(zaplist[numzaplist].hibin - zaplist[numzaplist].lobin) / T);
numzaplist++;
qsort(zaplist, numzaplist, sizeof(bird), compare_birds);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
}
break;
case 'P': /* Print the current plot */
case 'p':
{
int len;
char filename[200];
printf(" Enter the filename to save the plot as:\n");
fgets(filename, 196, stdin);
len = strlen(filename) - 1;
filename[len + 0] = '/';
filename[len + 1] = 'P';
filename[len + 2] = 'S';
filename[len + 3] = '\0';
psid = cpgopen(filename);
cpgslct(psid);
cpgpap(10.25, 8.5 / 11.0);
cpgiden();
cpgscr(15, 0.8, 0.8, 0.8);
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
cpgclos();
cpgslct(xid);
cpgscr(15, 0.4, 0.4, 0.4);
filename[len] = '\0';
printf(" Wrote the plot to the file '%s'.\n", filename);
}
break;
case 'N': /* Changing power normalization */
case 'n':
{
float inx2 = 0.0, iny2 = 0.0;
char choice;
unsigned char badchoice = 1;
printf(" Specify the type of power normalization:\n"
" m,M : Median values determined locally\n"
" d,D : DC frequency amplitude\n"
" r,R : Raw powers (i.e. no normalization)\n"
" u,U : User specified interval (the average powers)\n");
while (badchoice) {
cpgcurs(&inx2, &iny2, &choice);
switch (choice) {
case 'M':
case 'm':
norm_const = 0.0;
maxpow = 0.0;
badchoice = 0;
printf
(" Using local median normalization. Autoscaling is on.\n");
break;
case 'D':
case 'd':
norm_const = 1.0 / r0;
maxpow = 0.0;
badchoice = 0;
printf
(" Using DC frequency (%f) normalization. Autoscaling is on.\n",
r0);
break;
case 'R':
case 'r':
norm_const = 1.0;
maxpow = 0.0;
badchoice = 0;
printf
(" Using raw powers (i.e. no normalization). Autoscaling is on.\n");
break;
case 'U':
case 'u':
{
char choice2;
float xx = inx, yy = iny;
int lor, hir, numr;
double avg, var;
printf
(" Use the left mouse button to select a left and right boundary\n"
" of a region to calculate the average power.\n");
do {
cpgcurs(&xx, &yy, &choice2);
} while (choice2 != 'A' && choice2 != 'a');
lor = (int) ((xx + offsetf) * T);
cpgsci(7);
cpgmove(xx, 0.0);
cpgdraw(xx, 10.0 * fv->maxpow);
do {
cpgcurs(&xx, &yy, &choice2);
} while (choice2 != 'A' && choice2 != 'a');
hir = (int) ((xx + offsetf) * T);
cpgmove(xx, 0.0);
cpgdraw(xx, 10.0 * fv->maxpow);
cpgsci(1);
if (lor > hir) {
int tempr;
tempr = hir;
hir = lor;
lor = tempr;
}
numr = hir - lor + 1;
avg_var(lofp->rawpowers + lor - lofp->rlo, numr, &avg, &var);
printf(" Selection has: average = %.5g\n"
" std dev = %.5g\n", avg, sqrt(var));
norm_const = 1.0 / avg;
maxpow = 0.0;
badchoice = 0;
printf
(" Using %.5g as the normalization constant. Autoscaling is on.\n",
avg);
break;
}
default:
printf(" Unrecognized choice '%c'.\n", choice);
break;
}
}
free(fv);
fv = get_fftview(centerr, zoomlevel, lofp);
cpgpage();
offsetf = plot_fftview(fv, maxpow, 1.0, 0.0, 0);
}
break;
case 'Q': /* Quit */
case 'q':
printf(" Quitting...\n");
free(fv);
cpgclos();
break;
default:
printf(" Unrecognized option '%c'.\n", inchar);
break;
}
} while (inchar != 'Q' && inchar != 'q');
free_fftpart(lofp);
#ifdef USEMMAP
close(mmap_file);
#else
fclose(fftfile);
#endif
if (lenzaplist)
free(zaplist);
printf("Done\n\n");
return 0;
}
static void _pgsave (void)
{
cpgsave();
}
