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Re: [Help-gsl] Cubic Spline Interpolation

From: Paulo Jabardo
Subject: Re: [Help-gsl] Cubic Spline Interpolation
Date: Thu, 1 Mar 2007 13:12:13 -0300 (ART)

If the data is available in a regular grid then this
is the best solution. If it is not...

There is a procedure developed by Akima. The method
can be used to interpolate irregularly spaced data. It
basically builds a triangular mesh on the data and
uses this mesh to interpolate the data (linear or

I've used the implementation available as a package
for r-project ( look for the
akima package.

Maybe we could try to port this package to GSL? We can
not just use the fortran code because the license is
for non-comercial use only. I will see if I can
reimplement the method. It would be a nice addition to


--- Patrick Alken <address@hidden>

> Hi,
>   I've never actually done 2D interpolation, but a
> quick glance
> at Numerical Recipes indicates it can be done by
> applying the
> 1D routine on a 2D grid. The book is available
> online so I'll
> just refer you to section 3.6 and say good luck :-).
> Patrick Alken
> _______________________________________________
> Help-gsl mailing list
> address@hidden

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