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From | Grace Jessie <gracejessie@hotmail.com> |
To | <statalist@hsphsun2.harvard.edu> |
Subject | RE: st: a loop error of -foreach- |
Date | Fri, 17 Sep 2010 15:36:51 +0000 |
More exactly, I want to do -reg b x1 x2- if `j' gets the value of b,and do -logit a/c/d x1 x2- otherwise, where x1 and x2 are independent variables. I just want to take the lists as elements and then do different things,i.e., do different things for different elements in the lists. Grace ---------------------------------------- > From: gracejessie@hotmail.com > To: statalist@hsphsun2.harvard.edu > Subject: RE: st: a loop error of -foreach- > Date: Fri, 17 Sep 2010 15:26:06 +0000 > > Dear Uli and Maarten, > Thank you for your replies. > I know what is wrong after your explanations. > However, what I want to do is letting stata interpret the elements of the lists just as elements, not variable names. > In fact, I want to do -count- commmand or any other commands if the element is b and do others (such as -su-) otherwise. > How to modify my loop for doing that? > Thank you. > > Best regards, > Grace > > ---------------------------------------- > > Date: Fri, 17 Sep 2010 09:18:39 +0000 > > From: maartenbuis@yahoo.co.uk > > Subject: Re: st: a loop error of -foreach- > > To: statalist@hsphsun2.harvard.edu > > > > --- On Fri, 17/9/10, Grace Jessie wrote: > > > I encountered a loop problem. > > > The commands I edited are as follwows. > > > > > > foreach j in a b c d { > > > foreach i in e f g { > > > if `j'==b { > > > count > > > } > > > else { > > > su > > > } > > > } > > > } > > > > > > Sometimes the error was showed "b ambiguous > > > abbreviation",sometimes the error was "type mismatch". > > > What is wrong? > > > In my mind, -foreach lname in- can be followed by > > > any_list. > > > > the problem is not with -foreach- but with the commands > > inside your loop. Apperently the elements your are looping > > over are not always unique variable names and sometimes > > they are string variable where numeric variables where > > expected or vice versa. > > > > Hope this helps, > > Maarten > > > > -------------------------- > > Maarten L. Buis > > Institut fuer Soziologie > > Universitaet Tuebingen > > Wilhelmstrasse 36 > > 72074 Tuebingen > > Germany > > > > http://www.maartenbuis.nl > > -------------------------- > > > > > > > > > > * > > * For searches and help try: > > * http://www.stata.com/help.cgi?search > > * http://www.stata.com/support/statalist/faq > > * http://www.ats.ucla.edu/stat/stata/ > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/