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[gnuastro-devel] [task #14146] Select pixels that are blank
From: |
Mohammad Akhlaghi |
Subject: |
[gnuastro-devel] [task #14146] Select pixels that are blank |
Date: |
Tue, 6 Sep 2016 12:05:43 +0000 (UTC) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0 |
Update of task #14146 (project gnuastro):
Status: Postponed => Done
Percent Complete: 0% => 100%
Assigned to: None => makhlaghi
Open/Closed: Open => Closed
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Follow-up Comment #2:
This task has been completed and is pushed
<http://git.savannah.gnu.org/cgit/gnuastro.git/commit/?id=8df52c61e2> to the
main repo.
The `blank' operand that was suggested in the first comment was not the
solution. Because it would violate the definition of a NaN: a NaN value must
not be equal to anything, even itself.
Instead to complete this task, a much more cleaner and correct way was chosen:
to define a `isblank' operator (based on C's `isnan' function). This
operator's only job is to return the output of the `isnan' function on each
pixel or number that it pops out.
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