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RE: st: tempfile & scope
At 05:33 PM 9/25/2003 +0100, you wrote:
> This last point seems to be a good one. It's true, I don't
> need to define
> -tempname- in each loop. I guess I had just put it with
> -tempfile- out of
> habit. On the other hand, does it really make much
> difference? I don't
> imagine my computing time is shortened noticeably by
> putting it outside the
> loop, no?
Nick Winter (!= myself) raised a good point about this.
My own posting earlier was mostly fixated on the syntax
It makes a big difference, namely the difference
between putting everything in one file and separate
results in separate files. Computing time is
With the former, presumably -dsconcat- would be
To add more, we'd need to know more about the real problem.
Back to Nick Winter (!=Nick Cox; we'll leave aside whether that's > or
<)... actually, I had only advocated putting the -tempname- outside the
loop; then you would be opening each (different) file with the same handle.
To answer Danielle Ferry's question, no, I don't think that would make much
difference in terms of performance--some tiny bit of extra overhead and
memory for Stata to create an additional local, but trivial.
Nick Cox suggests that you could just post everything to one file, rather
then sending it to two different files then concatenating. THat seems wise
Nicholas Winter 308 White Hall
Assistant Professor t:607.255.8819
Department of Government f:607.255.4530
Cornell University firstname.lastname@example.org
Ithaca, NY 14853-7901 falcon.arts.cornell.edu/nw53
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