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Maybe this FAQ by NJC gives you some hints:
http://www.stata.com/support/faqs/data/grid.html
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von David Torres
Gesendet: Dienstag, 7. Juli 2009 04:31
An: [email protected]
Betreff: st: data points within radius?
I have two datasets that were nonmatch merged and I need to get the
number of data points of the using data set that are within various
radii of each of the unique levels of the master data set. To be
clear, both data sets have longitude and latitude coordinates in
decimal degrees. Now, I have tried the -circnum- user-created
command, but I think it only calculates points within radius of one
pair of coordinates. I need something a little more sophisticated.
Can anyone help?
--------------------------------------------
David Diego Torres, MA(Sociology)
PhD Candidate in Sociology
2030D Population Studies Center
University of Michigan Institute for Social Research
Ann Arbor MI 48106-1248
Tel 734.763.4098
Fax 734.763.1428
torresd at umich dot edu
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