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RE: st: RE: collapse is too memory demanding
From
Oliver Jones <[email protected]>
To
[email protected]
Subject
RE: st: RE: collapse is too memory demanding
Date
Tue, 27 Jul 2010 13:04:29 +0200
Thanks for your advice.
Today I spoke to a colleague on the phone and he thinks that -collapse- saves the results (in
my case the sums) in a new double variable in the original dataset.
The answer to my question therefore might be, that in my case I approximately need additional
70*8*20000000 bytes, i.e. 10.6 GB free memory.
The calculation goes as follows: I collapse a varlist of 70 variables, thus stata generates 70
double variables each requiring 8 bytes per observation and I got 20 million observations...
@ Nick: The -tabstat- is not exactly what I need, because it allows just one varname in the
by(varname) option and I need two. Besides I want to save the results in a file.
@ David: The workaround is going to be the solution!
Thanks,
Oliver
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