diff options
Diffstat (limited to 'astro/fits')
| -rwxr-xr-x | astro/fits/fitscube.py | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/astro/fits/fitscube.py b/astro/fits/fitscube.py index fbdaaf8..720e169 100755 --- a/astro/fits/fitscube.py +++ b/astro/fits/fitscube.py @@ -384,6 +384,33 @@ def cmd_sub(args): print("Saved FITS cube: %s" % args.outfile) +def cmd_div(args): + """ + Sub-command: "div", divide one FITS cube by another one + """ + if not args.clobber and os.path.exists(args.outfile): + raise FileExistsError("output file already exists: %s" % args.outfile) + + cube = FITSCube(args.infile) + print("Data cube unit: %s" % cube.unit) + print("Image/slice size: %dx%d" % (cube.width, cube.height)) + print("Number of slices: %d" % cube.nslice) + + cube2 = FITSCube(args.infile2) + assert (cube.unit, cube.zunit) == (cube2.unit, cube2.zunit) + print("Dividing cube %s ..." % args.infile2) + with np.errstate(divide='warn'): + cube.data = cube.data / cube2.data + + if args.fill_value: + print("Filling invalid data with: %s" % args.fill_value) + cube.data[~np.isfinite(cube.data)] = float(args.fill_value) + + print("Saving FITS cube ...") + cube.write(args.outfile, clobber=args.clobber) + print("Saved FITS cube: %s" % args.outfile) + + def cmd_calibrate(args): """ Sub-command: "calibrate", calibrate the z-axis slice/channel responses @@ -613,6 +640,22 @@ def main(): help="another input FITS cube as the subtrahend") parser_sub.set_defaults(func=cmd_sub) + # sub-command: "divide" + parser_div = subparsers.add_parser( + "div", aliases=["divide"], + help="divide one FITS cube by another one") + parser_div.add_argument("-C", "--clobber", action="store_true", + help="overwrite existing output file") + parser_div.add_argument("-F", "--fill-value", dest="fill_value", + help="value to fill the invalid elements") + parser_div.add_argument("-o", "--outfile", required=True, + help="output FITS cube filename") + parser_div.add_argument("-i", "--infile", required=True, + help="input FITS cube as the dividend") + parser_div.add_argument("-I", "--infile2", required=True, + help="another input FITS cube as the divisor") + parser_div.set_defaults(func=cmd_div) + # sub-command: "calibrate" parser_cal = subparsers.add_parser( "cal", aliases=["calibrate"], |