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st: RE: RE: joinby command and memory issues


From   "Weichle, Thomas" <Thomas.Weichle@va.gov>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: joinby command and memory issues
Date   Fri, 8 Oct 2010 12:02:53 -0500

Sorry for the confusion.  I was successful in dropping the other
variables in epo.dta resulting in 2 variables that remain (study_id,
receipt date).  Then, I tried to join epo.dta with hgb.dta (which is in
memory) containing 3 variables (study_id, test date, test result).
After trying the joinby command is where I still received the error
saying that there is no room to add more observations.

--- From Nick Cox ---
This is unclear to me: 

1. What does "try to drop" mean? Did -drop- work? If not, what error
messages did you get? Or why say "try"? 

2. This description doesn't seem to match your earlier one just a few
minutes ago. Here epo.dta has 2 variables. A few minutes ago it included
other variables you didn't want and wanted to know how to ignore. 

I don't think people can easily give good advice if the precise problem
is not clear. 

As in an earlier thread today, the limits of Stata are given by -help
limits-. Almost always, the memory available on your machine is what
really bites. 

Nick 
n.j.cox@durham.ac.uk 


Tom Weichle
Math Statistician
Center for Management of Complex Chronic Care (CMC3)
Hines VA Hospital, Bldg 1, C202
708-202-8387 ext. 24261
Thomas.Weichle@va.gov 


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