Re: 3d surface plot

[Jaroslav Hajek]

On Fri, Apr 25, 2008 at 6:45 PM, Floyd poole <address@hidden> wrote:
>
>
> Is it possible to create a 3d image of several thousand depth measurements?
> I have a two axis scanner, which provides x and y data, but I cant figure
> out how to get a 3d image of a corrosion map.
>
> Sample data file includes:
>
> .356 (depth) 46 (amplitude) , so there are two rows in the data file depth
> and distance
>
>
>
>
>
> Thanks,
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>

 You can also try the OctGPR package from OctaveForge for Gaussian
Process Regression (also known as ordinary/universal Kriging in
geostatistics), with automatic MLE estimation of covariance parameters
length scales. Several thousand observations should be manageable with
a good computer (currently, there is only Kriging with full cov.
matrix. A sparse method may be ready next month (or sooner, if there's
demand)).
a small demo is found at:
http://artax.karlin.mff.cuni.cz/~hajej2am/octgpr.php

If your data is not private or secret, I'd love to help you with using
my package.

regards,

-- 
RNDr. Jaroslav Hajek
computing expert
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz