[Openspace] Memory Problems

[Julia Koschinsky]

David,

What kind of weights matrix are you using? The run time is 
not only dependent on your sample size but also on the 
complexity of your neighborhood structure. We've run spatial 
regressions in GeoDa for about 100,000 in 20 minutes with 
rook for some datasets and had to wait much longer or 
switched to instrumental variables estimation for others. 

Did you try running the regression with a different weights 
matrix (e.g., rook, if you have a polygon file) to test this?

Julia

---- Original message ----
>Date: Fri, 16 Sep 2005 16:58:51 +0000
>From: "David Barker" <barkrich at msn.com>  
>Subject: [Openspace] Memory Problems  
>To: openspace at sal.uiuc.edu
>
>I get an ?Out of Memory? error when running a spatial error 
regression with 
>a large number of observations (around 30,000).  Adding 
more virtual memory 
>seemed to help ? it took longer for the error to pop up, 
but there are 
>limits to the amount of virtual memory I can use in 
Windows  2000.  If I 
>switch to the new 64 bit version of Windows (Windows XP 
Professional x64) 
>will that help?
>
>
>
>I was able to create the weights matrix, although it took a 
while!
>
>
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