Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st:Hang Up


From   Ronán Conroy <rconroy@rcsi.ie>
To   "statalist hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st:Hang Up
Date   Mon, 17 May 2004 20:38:13 +0100

on 17/05/2004 20:18, Syed Gillani at gillani@shabakah.net.sa wrote:

> Hello all,
> Stata consistently hangs up on tabulate for two variables, both with more
> than two categories, with option exact.
> Is it just my system?
> Version = 8,2
> OS = Windows98 & WindowsXP Professional

Cannot replicate this on OS X, but note that the exact option has a heavy
overhead on processor time. While a 3 x 3 table with 121 obs took 3 seconds
(and that's a long time in Stata) a table with 1657 obs was still running at
400 seconds, at which point I aborted it. But Stata hadn't hung - it
responded instantly to <cmd-period> and duly reported the time taken.

Actually, hypothesis tests for tables that go beyond 2 x 2 are rarely
informative. Have you considered a more hypothesis-driven approach?


Ronan M Conroy (rconroy@rcsi.ie)
Lecturer in Biostatistics
Royal College of Surgeons
Dublin 2, Ireland
+353 1 402 2431 (fax 2764)

--------------------
Just say no to drug reps
http://www.nofreelunch.org/

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index