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st: Memory problems when creating a spatial weight matrix

From   "Lina Jonsson" <[email protected]>
To   <[email protected]>
Subject   st: Memory problems when creating a spatial weight matrix
Date   Fri, 21 Sep 2007 11:25:20 +0200

Dear statalisters.

I am working with a hedonic price study where I whould like to check for
and correct for spatial autocorrelation. For this I whould like to
create a spatial weight matrix based on the x- and y-coordinates for
each house using the spatwmat-command in spdep. Since I have Intercooled
Stata the maximum matsize that I can set is 800, which means that I can
use no more than 800 observations. But since I cannot set memory to more
than 940m, the actual numbers of observations that I can use is less
than 500. This is to few. 

After reading some old questions concerning memory problems I realize
that this might be a problem that is hard to solve. 
Does any of you have any suggestions on how I can increase the memory in
Stata. Can increasing the RAM-memory on my computer help? Or is it
unrealistic to think that it will be possible to create a matrix whith
the spatwmat-command that will be almost 8000x800 on a "standard"
computer? Should I change to some other software and what in that case?

I am greatful for any suggestions!

/Lina Jonsson

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