[gnuastro-devel] [task #14244] Define columns at run-time

[Mohammad Akhlaghi]

URL:
  <http://savannah.gnu.org/task/?14244>

                 Summary: Define columns at run-time
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Sat 19 Nov 2016 09:59:59 PM JST
         Should Start On: Sat 19 Nov 2016 12:00:00 AM JST
   Should be Finished on: Sat 19 Nov 2016 12:00:00 AM JST
                Category: MakeCatalog
                Priority: 5 - Normal
              Item Group: Enhancement
                  Status: Postponed
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

Currently MakeCatalog can only make columns that are internally defined for
it. The process of implementing a new column in MakeCatalog is not hard and
infact we even have a section
<https://www.gnu.org/software/gnuastro/manual/html_node/Adding-new-columns-to-MakeCatalog.html>
in the book.

However, ultimately, each pixel only has a position (x,y) and value (v). So it
should not be hard to allow the users to define columns at run-time, through a
file (for example) with a good sytax to make it easy. In Arithmetic
<https://www.gnu.org/software/gnuastro/manual/html_node/Arithmetic.html>, we
already do have a very simple syntax parser for statements which can be
used/exteded together with this task.




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