[SciPy-dev] interp2d and sandbox/delaunay
jtravs at gmail.com
Thu Oct 12 13:08:49 CDT 2006
As you may have guessed from my noise (tell me to shut up if i'm
irritating), i'm taking a serious look at the state of
As previously stated, I think it needs to be reorganised/split into
several parts, but I'll leave that to other threads.
In this post I'm wondering about the status of interp2d.
At the moment it is based on netlib->dierckx->surfit. This is bad as
this routine should not be used for interpolation. I think others have
had problems with this code (reading about a year ago on scipy-user) -
it segfaults mine.
I have recently implemented netlib->dierckx->regrid. Which
interpolates nicely for regular rectangular grids -> this could be
used in interp2d, except that it doesn't work on scattered data (is
this required? I think so yes).
The solution would be to call regrid for regular data and
<some_other_method> for scattered data.
The best <some_other_method> appears to be delaunay triangulation
followed by natural neighbour interpolation or regrid. (this is what
So my questions are:
1. can I fiddle with interp2d and the other scipy.interpolate stuff?
2. what is the status of the sanbox/delaunay stuff (why is it not in
the main scipy) if there is a problem with it, can I package a
different package that does this?
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