static void _pgaxis (void)
{
char *opt;
float x1, y_1, x2, y2, v1, v2, step;
int nsub;
float dmajl, dmajr, f_min, disp, orient;
if (-1 == pop_5_floats (&dmajl, &dmajr, &f_min, &disp, &orient))
return;
if (-1 == SLang_pop_integer (&nsub))
return;
if (-1 == pop_5_floats (&x2, &y2, &v1, &v2, &step))
return;
if (-1 == pop_5_floats (&x1, &y_1, NULL, NULL, NULL))
return;
if (-1 == SLang_pop_slstring (&opt))
return;
cpgaxis (opt, x1, y_1, x2, y2, v1, v2, step,
nsub, dmajl, dmajr, f_min, disp, orient);
SLang_free_slstring (opt);
}
int closure (
const char ctypeS[9],
double restfrq,
double restwav,
int naxisj,
double crpixj,
double cdeltX,
double crvalX)
{
char ptype, sname[32], title[80], units[8], xtype, ylab[80];
int nFail = 0, restreq, stat1[NSPEC], stat2[NSPEC], status;
register int j;
float tmp, x[NSPEC], xmin, xmax, y[NSPEC], ymax, ymin;
double cdeltS, clos[NSPEC], crvalS, dSdX, resid, residmax, spec1[NSPEC],
spec2[NSPEC];
struct spcprm spc;
/* Get keyvalues for the required spectral axis type. */
if ((status = spcxps(ctypeS, crvalX, restfrq, restwav, &ptype, &xtype,
&restreq, &crvalS, &dSdX))) {
printf("ERROR %d from spcxps() for %s.\n", status, ctypeS);
return 1;
}
cdeltS = cdeltX * dSdX;
spcini(&spc);
if (ctypeS[5] == 'G') {
/* KPNO MARS spectrograph grism parameters. */
spc.pv[0] = mars[0];
spc.pv[1] = mars[1];
spc.pv[2] = mars[2];
spc.pv[3] = mars[3];
spc.pv[4] = mars[4];
spc.pv[5] = mars[5];
spc.pv[6] = mars[6];
}
/* Construct the axis. */
for (j = 0; j < naxisj; j++) {
spec1[j] = (j+1 - crpixj)*cdeltS;
}
printf("%4s (CRVALk+w) range: %13.6e to %13.6e, step: %13.6e\n", ctypeS,
crvalS+spec1[0], crvalS+spec1[naxisj-1], cdeltS);
/* Initialize. */
spc.flag = 0;
spc.crval = crvalS;
spc.restfrq = restfrq;
spc.restwav = restwav;
strncpy(spc.type, ctypeS, 4);
spc.type[4] = '\0';
strcpy(spc.code, ctypeS+5);
/* Convert the first to the second. */
if ((status = spcx2s(&spc, naxisj, 1, 1, spec1, spec2, stat1))) {
printf("spcx2s ERROR %d: %s.\n", status, spc_errmsg[status]);
}
/* Convert the second back to the first. */
if ((status = spcs2x(&spc, naxisj, 1, 1, spec2, clos, stat2))) {
printf("spcs2x ERROR %d: %s.\n", status, spc_errmsg[status]);
}
residmax = 0.0;
/* Test closure. */
for (j = 0; j < naxisj; j++) {
if (stat1[j]) {
printf("%s: w =%20.12e -> %s = ???, stat = %d\n", ctypeS, spec1[j],
spc.type, stat1[j]);
continue;
}
if (stat2[j]) {
printf("%s: w =%20.12e -> %s =%20.12e -> w = ???, stat = %d\n",
ctypeS, spec1[j], spc.type, spec2[j], stat2[j]);
continue;
}
resid = fabs((clos[j] - spec1[j])/cdeltS);
if (resid > residmax) residmax = resid;
if (resid > tol) {
nFail++;
printf("%s: w =%20.12e -> %s =%20.12e ->\n w =%20.12e, "
"resid =%20.12e\n", ctypeS, spec1[j], spc.type, spec2[j],
clos[j], resid);
}
}
printf("%s: Maximum closure residual = %.1e pixel.\n", ctypeS, residmax);
/* Draw graph. */
cpgbbuf();
cpgeras();
xmin = (float)(crvalS + spec1[0]);
xmax = (float)(crvalS + spec1[naxisj-1]);
ymin = (float)(spec2[0]) - xmin;
ymax = ymin;
for (j = 0; j < naxisj; j++) {
x[j] = (float)(j+1);
y[j] = (float)(spec2[j] - (crvalS + spec1[j]));
if (y[j] > ymax) ymax = y[j];
if (y[j] < ymin) ymin = y[j];
}
j = (int)crpixj + 1;
if (y[j] < 0.0) {
tmp = ymin;
ymin = ymax;
ymax = tmp;
}
cpgask(0);
cpgenv(1.0f, (float)naxisj, ymin, ymax, 0, -1);
cpgsci(1);
cpgbox("ABNTS", 0.0f, 0, "BNTS", 0.0f, 0);
spctyp(ctypeS, 0x0, 0x0, sname, units, 0x0, 0x0, 0x0);
sprintf(ylab, "%s - correction [%s]", sname, units);
sprintf(title, "%s: CRVALk + w [%s]", ctypeS, units);
cpglab("Pixel coordinate", ylab, title);
cpgaxis("N", 0.0f, ymax, (float)naxisj, ymax, xmin, xmax, 0.0f, 0, -0.5f,
0.0f, 0.5f, -0.5f, 0.0f);
cpgaxis("N", (float)naxisj, ymin, (float)naxisj, ymax, (float)(ymin/cdeltS),
(float)(ymax/cdeltS), 0.0f, 0, 0.5f, 0.0f, 0.5f, 0.1f, 0.0f);
cpgmtxt("R", 2.2f, 0.5f, 0.5f, "Pixel offset");
cpgline(naxisj, x, y);
cpgsci(7);
cpgpt1((float)crpixj, 0.0f, 24);
cpgebuf();
printf("Type <RETURN> for next page: ");
(void)getchar();
printf("\n");
return nFail;
}