[Openspace] A Question on Constructing
koschins at uiuc.edu
Wed Sep 14 10:28:12 CDT 2005
You can construct a weights matrix in GeoDa for your data.
1,500 observations won't be any problem. Here are the steps:
1. Download Geoda at
https://www.geoda.uiuc.edu/downloadin.php and open the
2. Go to Tools-Create-Weights and specify your input shape
file, output file name, and unique ID
3. Decide what kind of neighborhood structure best fits your
data and then choose a weights matrix format. For instance,
if you have plots, you can choose a rook matrix if there are
North-South, East-West effects (4 neighbors on a grid) or a
queen matrix if you want to include your N-S, E-W neighbors
as well as those sharing corners (8 neighbors on a grid).
4. Click Ok and you're done. If your shape file loads in
GeoDa, you can make sure everything is fine with your
weights matrix by opening it in the weights characteristics
5. You can use this weights matrix in Geoda or in other
packages (e.g., in R, where you can manipulate/transform it
further). You can open it in any text editor to get an
overview of the format. The GeoDa manual at
provides additional detail.
---- Original message ----
>Date: Wed, 14 Sep 2005 09:13:20 -0600
>From: Michael Habteyonas <mzh at ualberta.ca>
>Subject: [Openspace] A Question on Constructing Weights
>To: openspace at sal.uiuc.edu
>I want to contstruct a W Matrix for my model.
>I have 1500 observations: plots of land 10miles by 10 miles
in the province of
>Alberta, Canada. Is this obervation too much to construct
W? If it is not how
>can I contruct W.
>I have not yet used any software, what is the best option
to start with?
>Thanks for your help
>Openspace mailing list
>Openspace at sal.uiuc.edu
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