[gnuastro-devel] [task #14419] Using GSL functions for parametric interpolation

[Mohammad Akhlaghi]

URL:
  <http://savannah.gnu.org/task/?14419>

                 Summary: Using GSL functions for parametric interpolation
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Thu 23 Mar 2017 09:44:04 PM JST
         Should Start On: Thu 23 Mar 2017 12:00:00 AM JST
   Should be Finished on: Thu 23 Mar 2017 12:00:00 AM JST
                Category: Libraries
                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, (in the new lib/interpolated.c
<https://gitlab.com/makhlaghi/gnuastro/blob/datastruct/lib/interpolate.c>)
Gnuastro does a non-parametric interpolation (median value of a given number
of nearest non-blank values). Non-parametric interpolation is very useful to
avoid bad fits and impose the minimal assumptions on the result. So currently
it is the preferred/only way in Gnuastro.

But parametric interpolations can also be useful in some contexts and GSL
provides a good collection
<https://www.gnu.org/software/gsl/manual/html_node/Interpolation.html> of
them.

So it would be good if we could write wrappers for those functions in
`lib/interpolate.c' to make it easier to use them with Gnuastro's
`gal_data_t'.




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