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Experimental (Semi-) Variogram

by Wolfgang Schwanghart

19 Jun 2008 (Updated 24 Jun 2008)

Code covered by BSD License

calculate the experimental (semi-) variogram

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File Information

Description

variogram calculates the experimental variogram in various dimensions. It makes extensive use of two functions written by John D'Errico (ipmd, consolidator). Both are required to run the function.

Syntax:
d = variogram(x,y)
d = variogram(x,y,'pn','pv',...)

Requirements:
The function requires two functions written by John D'Errico available on the Mathworks FEX
1. IPMD (objectId=18937)
2. CONSOLIDATOR (objectId=8354)
The function uses parseargs (objectId=10670) by Malcolm wood as subfunction.

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
Consolidator, parseargs: Simplifies input processing for functions with multiple options, IPDM: Inter-Point Distance Matrix

MATLAB release

MATLAB 7.5 (R2007b)

Tags for This File
Everyone's Tags	dimensions, geostatistics, spatial modelling, variogram
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Comments and Ratings (4)
30 Jul 2009	Shazux Gharasoo	very nice program indeed. I had a question by the way. how the distance is calculated? direct distance or along X and Y streets?
02 Aug 2009	Wolfgang Schwanghart	Hi Shazux, the distance measure used here is the euclidean distance. I guess that is what you mean by direct distance, do you? Best regards, Wolfgang
17 Aug 2009	Shazux Gharasoo	that was what I meant, thank you :) one more question, how to pass the data that has been plot? i mean here: plot(out.distance,out.val,marker) I need to do some curve fitting on those values...
17 Aug 2009	Shazux Gharasoo	sorry, I found out that these values are saved already in variable 'd' as a structure. thanks though

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Updates
24 Jun 2008	removed an error in the calculation of the number of bins

Tag Activity for this File
Tag	Applied By	Date/Time
geostatistics	Wolfgang Schwanghart	22 Oct 2008 10:06:38
spatial modelling	Wolfgang Schwanghart	22 Oct 2008 10:06:38
variogram	Wolfgang Schwanghart	22 Oct 2008 10:06:38
dimensions	Wolfgang Schwanghart	22 Oct 2008 10:06:38

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