dear all, i'm an astronomer working with 2d images -- 2d numarrays. i have a script which basically does some operations on some images, and one of the first steps is to find a galaxy on an image (at, say, a known x,y coord), and create a sub-image by slicing out part of the larger array to create a more managable smaller one (e.g. 50x50 pixels from a 1000x1000 array).
i was running this fine under python 2.3.4, but due to the slowness of my machine, moved to a speedy 64-bit linux box running version 2.4.2. arrays were no longer being sliced in the correct way, for example: B = A[3:7,6:10] generates different Bs if i run an identical script on the same image on the different machines. note: we deal with FITS format images, which are read into numarrays using the pyfits.py module. does anyone know any obvious reason this should be happening? many thanks if you can help, jim -- http://mail.python.org/mailman/listinfo/python-list
