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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <gset.h>
include <mach.h>
include <imhdr.h>
include <mwset.h>
# T_PCOLS -- Plot the average of a range of columns from an image.
procedure t_pcols ()
pointer image, wcslab, fmt
pointer im, mw, ct, sp, x_vec, y_vec
int col1, col2, ncols, nlines
real zmin, zmax
int clgeti()
pointer immap(), mw_openim(), mw_sctran()
begin
call smark (sp)
call salloc (image, SZ_FNAME, TY_CHAR)
call salloc (wcslab, SZ_LINE, TY_CHAR)
call salloc (fmt, SZ_LINE, TY_CHAR)
# Open image
call clgstr ("image", Memc[image], SZ_FNAME)
im = immap (Memc[image], READ_ONLY, 0)
call clgstr ("wcs", Memc[wcslab], SZ_LINE)
mw = mw_openim (im)
call mw_seti (mw, MW_USEAXMAP, NO)
ct = mw_sctran (mw, "logical", Memc[wcslab], 0)
ncols = IM_LEN(im,1)
nlines = IM_LEN(im,2)
col1 = clgeti ("col1")
col2 = clgeti ("col2")
if (min(col1,col2) < 1 || max(col1,col2) > ncols) {
call imunmap (im)
call error (2, "column index references outside image")
}
# Get the requested columns from the image.
call malloc (x_vec, nlines, TY_REAL)
call malloc (y_vec, nlines, TY_REAL)
call plt_gcols (im, mw, ct, min(col1,col2), max(col1,col2),
Memr[x_vec], Memr[y_vec], zmin, zmax, Memc[wcslab], Memc[fmt],
SZ_LINE)
# Now draw the vector to the screen.
call pc_draw_vector (Memc[image], Memr[x_vec], Memr[y_vec], nlines,
zmin, zmax, col1, col2, Memc[wcslab], Memc[fmt], true)
# Free resources.
call mfree (x_vec, TY_REAL)
call mfree (y_vec, TY_REAL)
call imunmap (im)
call sfree (sp)
end
# PLT_GCOLS -- Get average of specified columns from an image. The average
# data vector is returned as y_vector; the line coordinates are returned in
# x_vector. The data vector min and max are also returned.
procedure plt_gcols (im, mw, ct, col1, col2, x_vector, y_vector, zmin, zmax,
wcslab, format, sz_wcslab)
pointer im # Pointer to image header
pointer mw # MWCS pointer
pointer ct # CT pointer
int col1 # First column to extract
int col2 # Last column to extract
real x_vector[ARB] # The row ordinal values (returned)
real y_vector[ARB] # The column data values (returned)
real zmin, zmax # Minimum and maximum data values (returned)
char wcslab[sz_wcslab] # WCS label if present
char format[sz_wcslab] # WCS format if present
int sz_wcslab # String length
int i, nrows, ncols
pointer sp, axvals, off, imgl2r()
real asumr()
begin
call smark (sp)
call salloc (axvals, IM_MAXDIM, TY_REAL)
# Fill x and y arrays.
nrows = IM_LEN(im,2)
ncols = col2 - col1 + 1
Memr[axvals] = (col1 + col2) / 2.
call plt_wcs (im, mw, ct, 2, Memr[axvals], 1., real(nrows), x_vector,
nrows, wcslab, format, sz_wcslab)
do i = 1, nrows {
off = imgl2r (im, i)
y_vector[i] = asumr (Memr[off+col1-1], ncols) / real (ncols)
}
# Find min and max values in y array.
call alimr (y_vector, nrows, zmin, zmax)
call sfree (sp)
end
# PC_DRAW_VECTOR - Draw the projected vector to the screen.
procedure pc_draw_vector (image,
xvec, yvec, nlines, zmin, zmax, col1, col2, wcslab, format, pcols)
char image[SZ_FNAME] #I Image name
real xvec[nlines], yvec[nlines] #I Vectors to be plot
int nlines #I Npts in vector
real zmin, zmax #I Vector min max
int col1, col2 #I Selected columns
char wcslab[ARB] #I WCS label
char format[ARB] #I WCS format
bool pcols #I Is task PCOLS? (y/n)
pointer sp, gp
pointer device, marker, xlabel, ylabel, title, suffix
real wx1, wx2, wy1, wy2, vx1, vx2, vy1, vy2, szm, tol
int mode, imark
bool pointmode
pointer gopen()
real clgetr(), plt_iformatr()
bool clgetb(), streq()
int btoi(), clgeti()
begin
call smark (sp)
call salloc (device, SZ_FNAME, TY_CHAR)
call salloc (marker, SZ_FNAME, TY_CHAR)
call salloc (xlabel, SZ_LINE, TY_CHAR)
call salloc (ylabel, SZ_LINE, TY_CHAR)
call salloc (title, SZ_LINE, TY_CHAR)
call salloc (suffix, SZ_FNAME, TY_CHAR)
call clgstr ("device", Memc[device], SZ_FNAME)
mode = NEW_FILE
if (clgetb ("append"))
mode = APPEND
gp = gopen (Memc[device], mode, STDGRAPH)
tol = 10. * EPSILONR
if (mode != APPEND) {
call clgstr ("xformat", Memc[xlabel], SZ_LINE)
if (!streq (Memc[xlabel], "wcsformat"))
call strcpy (Memc[xlabel], format, SZ_FNAME)
call clgstr ("xlabel", Memc[xlabel], SZ_LINE)
if (streq (Memc[xlabel], "wcslabel"))
call strcpy (wcslab, Memc[xlabel], SZ_LINE)
call clgstr ("title", Memc[title], SZ_LINE)
if (streq (Memc[title], "imtitle")) {
call strcpy (image, Memc[title], SZ_LINE)
if (pcols) {
call sprintf (Memc[suffix], SZ_FNAME, ": columns %d to %d")
call pargi (col1)
call pargi (col2)
} else {
call sprintf (Memc[suffix], SZ_FNAME, ": column %d")
call pargi (col1)
}
call strcat (Memc[suffix], Memc[title], SZ_LINE)
}
call clgstr ("ylabel", Memc[ylabel], SZ_LINE)
# Establish window.
wx1 = plt_iformatr (clgetr ("wx1"), format)
wx2 = plt_iformatr (clgetr ("wx2"), format)
wy1 = clgetr ("wy1")
wy2 = clgetr ("wy2")
# Set window limits to defaults if not specified by user.
if ((wx2 - wx1) < tol) {
wx1 = x_vec[1]
wx2 = x_vec[nlines]
}
if ((wy2 - wy1) < tol) {
wy1 = zmin
wy2 = zmax
}
call gswind (gp, wx1, wx2, wy1, wy2)
# Establish viewport.
vx1 = clgetr ("vx1")
vx2 = clgetr ("vx2")
vy1 = clgetr ("vy1")
vy2 = clgetr ("vy2")
# Set viewport only if specified by user.
if ((vx2 - vx1) > tol && (vy2 - vy1) > tol) {
call gsview (gp, vx1, vx2, vy1, vy2)
} else {
if (!clgetb ("fill"))
call gseti (gp, G_ASPECT, 1)
}
call gsets (gp, G_XTICKFORMAT, format)
call gseti (gp, G_XNMAJOR, clgeti ("majrx"))
call gseti (gp, G_XNMINOR, clgeti ("minrx"))
call gseti (gp, G_YNMAJOR, clgeti ("majry"))
call gseti (gp, G_YNMINOR, clgeti ("minry"))
call gseti (gp, G_ROUND, btoi (clgetb ("round")))
if (clgetb ("logx"))
call gseti (gp, G_XTRAN, GW_LOG)
if (clgetb ("logy"))
call gseti (gp, G_YTRAN, GW_LOG)
# Draw axes using all this information.
call glabax (gp, Memc[title], Memc[xlabel], Memc[ylabel])
}
pointmode = clgetb ("pointmode")
if (pointmode) {
call clgstr ("marker", Memc[marker], SZ_FNAME)
szm = clgetr ("szmarker")
call init_marker (Memc[marker], imark)
} else
call clgstr ("marker", Memc[marker], SZ_FNAME)
# Now to actually draw the plot.
if (pointmode)
call gpmark (gp, xvec, yvec, nlines, imark, szm, szm)
else
call hgpline (gp, xvec, yvec, nlines, Memc[marker])
call gflush (gp)
call gclose (gp)
call sfree (sp)
end
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