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Re: st: set memory with Stata/MP 10.0


From   Ronan Conroy <rconroy@rcsi.ie>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: set memory with Stata/MP 10.0
Date   Wed, 6 Feb 2008 10:50:07 +0000

On 5 Feb 2008, at 16:48, Genty, Celine wrote:

How can I open a database of 14 Go (11 columns and 186,000,000 rows) with Stata/MP 10.0 ?
It may be worth remembering that sample size estimation is the art of getting the required amount of precision with the minimum data.

Just because you have that many observations, you may not need them.

The existence of only 11 variables also suggests that the number of covariate patterns in your data is much less than the number of observations so that the dataset might also usefully collapsed.

But you do have a problem in that there's no way to get 14 gigs of data into 4 gigs of memory.


P Before printing, think about the environment
=================================
Ronan Conroy
rconroy@rcsi.ie
Royal College of Surgeons in Ireland
Epidemiology Department,
120 St Stephen's Green, Dublin 2, Ireland
+353 (0)1 402 2431
+353 (0)87 799 97 95
http://www.flickr.com/photos/ronanconroy/sets/72157601895416740/

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