[SciPy-user] Bilinear Interpolation
Stefan van der Walt
stefan at sun.ac.za
Wed Sep 27 11:07:35 EDT 2006
Hi Ryan
On Wed, Sep 27, 2006 at 08:09:18AM -0500, Ryan May wrote:
> > That's what I kinda thought, but using 'linear' for interp2d didn't give
> > me the same answer as when I performed the calculation manually. I'll
> > have to see what I can find on this...
>
> Ok, if I select the 4 points surrounding the location of interest,
> interp2d gives me the value I get with manually calculating a bilinear
> interpolation. However if I use the whole field (or even 9 points
> instead of 4), I get a different answer. I _know_ I wouldn't expect
> this for bilinear interpolation, and it would seem to imply that even
> _linear_ B-splines uses the information from additional points. Am I
> missing something here, or are the methods just not truly
> equivalent?
Please send some code so we can see what you are doing. Without that,
we are just discussing things in the air.
Cheers
Stéfan
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