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# Copyright (c) 2017 Weitian LI <liweitianux@live.com>
# MIT license
"""
Wrapper function to view FITS files using DS9.
"""
import subprocess
def ds9_view(filename, regfile=None, regformat="ciao", regsystem="physical",
cmap="he", binfactor=2, scale="linear", smooth=None):
"""
Wrapper function to view FITS files using DS9.
"""
cmd = [
"ds9", filename,
"-cmap", cmap,
"-bin", "factor", str(binfactor),
"-scale", scale,
]
if regfile:
cmd += [
"-regions", "format", regformat,
"-regions", "system", regsystem,
"-regions", regfile,
]
if smooth:
cmd += ["-smooth", "yes", "-smooth", "radius", str(smooth)]
subprocess.check_call(cmd)
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