bugGNU Astronomy Utilities - Bugs: bug #56573, Arithmetic sigclip-median gives...


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bug #56573: Arithmetic sigclip-median gives nan values with only 2 images

Submitter:  Raul Infante-Sainz <infantesainz>
Submitted:  Tue 02 Jul 2019 08:52:56 PM UTC
Category:  Arithmetic Severity:  3 - Normal
Item Group:  Output not reasonable Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open

Tue 02 Jul 2019 08:52:56 PM UTC, original submission:  

When trying to combine only two images with `sigclip-median' operator the result is not reasonable. In the output there are some nan values that I think it is because the sigma clipped median is not well defined (due to the small number of values).

That operator with such few number of images has no sense, so maybe it could print a warning but it should give a result with no nans. If the sigma clipped median/mean is not well defined, then give the median/mean value (with no sigma clipping).

Sounds reasonable?

Raul Infante-Sainz <infantesainz>
Group Member


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