help-octave
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Test data for (m-code) semiovariogram?


From: PhilipNienhuis
Subject: Re: Test data for (m-code) semiovariogram?
Date: Fri, 21 Jun 2013 06:40:08 -0700 (PDT)

forkandwait wrote
> Hi all,
> 
> I have succeeded in writing a semivariogram code that runs to completion
> and 
> gives not completely wacky graphs.  I find it hard to really test it,
> though, 
> so ... 
> 
> Does anyone know of a good test dataset, with known correct input and
> ouptut, 
> that I can run to verify the code?

Just a little bit of googling turned up this:

http://www.ats.ucla.edu/stat/mult_pkg/faq/general/spatial_autocorr.htm
&
http://www.ats.ucla.edu/stat/sas/faq/SAS_variogram_fit.htm

The grid size isn't specified but I'd suggest to just assume 100x100 m (or
feet, or miles, or whatever.... if only the variogram shape makes sense)

I agree that it was harder than I initially thought to uncover easily,
immediately usable test data. If it gets too hard for you I'll try to dig
deep into my own archives (floppies, gnah). No guarantees though.
At the same time, while googling for test data, I almost got drowned in
ready-baked variogram procedures - indeed, several from Matlab Central ;-P

The statistics package may be a good target; I'd suggest to add a new
category "geostatistics"

Philip




--
View this message in context: 
http://octave.1599824.n4.nabble.com/M-code-for-semiovariogram-tp4654490p4654624.html
Sent from the Octave - General mailing list archive at Nabble.com.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]