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Tue, 05 Apr 2011 08:11:13 -0500
Ashley Arnio <firstname.lastname@example.org> has a question about -spmat export-
producing unexpected results when exporting a k-nearest-neighbor matrix
in a neighbor list format:
> I created the matrix and ran the summary statistics. The summary
> statistics revealed that a matrix was created in which each of my counties had
> 5 nearest neighbors. But, when I look at the neighbor list with the following
> spmat export nn5 using nn5_list.txt , nlist replace
> I notice that some of my counties have 0 neighbors and others have as many as
> When I view the weights properties using the following command,
> spmat export nn5 using nn5_properties.txt , replace
> I can see that each county has five weights listed.
> Why are the two lists different and how does Stata create weights for places
> without neighbors?
Ashley discovered a bug in -spmat export-. The bug has been fixed and Ashley
should obtain the latest version of sppack by typing
. ssc install sppack, replace
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