Write pixel values (to standard out) for a box in a FITS images.
% boxpix.sh n3379.fits 871 873 476 478
199.195
218.284
215.384
231.240
206.822
229.479
202.931
233.999
226.428
boxpix.sh a.fits 120 130 210 290
arg1 - image name
arg2 - i1
arg3 - i2
arg4 - j1
arg5 - j2
This is not generally such useful code, but it provided
a nice way to create test data files while learning how to
use the Python numpy package.