[bug #64392] Arithmetic's isnotblank operator producing zeros when no blanks present

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/bugs/?64392>

                 Summary: Arithmetic's isnotblank operator producing zeros
when no blanks present
                   Group: GNU Astronomy Utilities
               Submitter: makhlaghi
               Submitted: Fri 07 Jul 2023 12:18:10 PM BST
                Category: Arithmetic
                Severity: 3 - Normal
              Item Group: Output not reasonable
                  Status: In Progress
                 Privacy: Public
             Assigned to: makhlaghi
             Open/Closed: Open
         Discussion Lock: Any


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Follow-up Comments:


-------------------------------------------------------
Date: Fri 07 Jul 2023 12:18:10 PM BST By: Mohammad Akhlaghi <makhlaghi>
When the input data doesn't have any blank elements, the 'isnotblank' operator
will return a 0-valued dataset! While it should a one-valued dataset.

The problem can be reproduced with the commands below:


$ astarithmetic 100 100 2 makenew -o zeros.fits
$ astarithmetic zeros.fits isnotblank
$ aststatistics zeros_arith.fits  --minimum --maximum
0 0









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