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 Post subject: BiCubic Interpolation
PostPosted: Thu Apr 14, 2011 6:40 pm 
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Joined: Thu Apr 14, 2011 6:31 pm
Posts: 2
Hi, I am kind of new to VBA.

I am trying to use the Bicubic Interpolation functionality. I want to interpolate points on a curved plane and bilinear interpolation doesn't capture some of the convexity that i need.

I only imported the spline3.bas into my excel project. But in the internal subroutine "Sub BicubicCalcDerivatives", it calls BuildCubicSpline and SplineDifferentiation, both of which I cannot find in any of the other modules included in the download. Would anyone happen to know where these are?

Thank you in advance for any help.

RJ


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 Post subject: Re: BiCubic Interpolation
PostPosted: Thu Apr 14, 2011 11:26 pm 
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Joined: Sun May 16, 2010 11:42 pm
Posts: 63
If you are using the VBA current version (2.6) they are both in Spline3.bas

You might find the blog post here useful: http://newtonexcelbach.wordpress.com/20 ... th-alglib/

It contains a link to a spreadsheet with working examples of bicubic interpolation.

_________________
Doug Jenkins
http://newtonexcelbach.wordpress.com/


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 Post subject: Re: BiCubic Interpolation
PostPosted: Fri Apr 15, 2011 2:33 pm 
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Joined: Thu Apr 14, 2011 6:31 pm
Posts: 2
Doug,

Thank you so much for the info and the link! I think your blog is great, thank you for putting that content out there!

RJ


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