Thursday, March 16, 2006

st: -spautoc- updated on SSC

Thanks to Kit Baum, a -spautoc- package on SSC has been updated.

-spautoc- calculates spatial autocorrelation, specifically Moran and Geary measures, given a spatial variable and neighbourhood information. Optionally numeric weights may be specified reflecting e.g. distance between locations. The package contains, as well as the main command -spautoc-, utilities -dupneigh-, -neigh- and -numids- to help setting up neighbourhood and weight information in the required way.

These programs all require Stata 8.

The earlier versions for Stata 5 (!) are also included: all such files have suffix 5 to the main part of the filename.

If you are interested in this field, you should also look at

STB-60 sg162 . . . . . . . . . . . . . . . . Tools for spatial data analysis (help spatcorr, spatreg, spatgsa, spatlsa if installed) . . M. Pisati 3/01 pp.21--37; STB Reprints Vol 10, pp.277--298 commands for spatial data analysis including spatial (global or local) autocorrelation, spatial correlogram, spatial lag and spatial error regression, and tests for spatial dependence

Oddly enough, I have not yet looked in detail at Maurizio's programs. My programs did what I wanted them to do when I first wrote them in 1997, and as I use them in teaching and get occasional queries about them I decided to refresh the package.

Nick n.j.cox@durham.ac.uk

* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/


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