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From |
Sergiy Radyakin <[email protected]> |

To |
"[email protected]" <[email protected]> |

Subject |
Re: st: -foreach- loop to fit regression at each level of a variable |

Date |
Tue, 19 Nov 2013 14:49:53 -0500 |

There are many ways to get to the same result. one convenience with the loop written explicitly is that it is easier for a beginner to add new things into the loop's body, for example, to save results to matrices, or dump to a file, and many other tasks. Many Stata commands support -by- prefix/suffixes, which can be used to avoid explicit looping, at the expense of more constraints at the command. Best,Sergiy Radyakin On Tue, Nov 19, 2013 at 2:40 PM, Nick Winter <[email protected]> wrote: > isn't this what the -by:- prefix does: > > by sample_level, sort: logistic ... > > > - Nick Winter > > > > On 11/19/2013 11:11 AM, Sergiy Radyakin wrote: >> >> Milena, is this something you are after? >> >> set seed 123 >> clear >> set obs 740 >> generate sample_level=floor(runiform()*4) >> generate outcome=runiform()*4200>2000 >> generate var1=runiform() >> generate var2=runiform() >> generate var3=runiform() >> generate id=floor(runiform()*2) >> >> levelsof sample_level, local(levs) >> >> foreach n in `levs' { >> display "" >> display "======== Regression for level: `n' >> ====================================" >> logistic outcome var1 var2 var3 if sample_level==`n', vce(cluster id) >> } >> >> Best, Sergiy >> >> On Tue, Nov 19, 2013 at 7:34 AM, Milena Przheska >> <[email protected]> wrote: >>> >>> Dear Statalist members, >>> >>> I am trying to fit the same logistic regression model using different >>> samples from a data set and I am wondering if it is even possible to >>> use a -foreach- loop to estimate regression models for each sample >>> (indicated by a variable). >>> >>> I use the variable 'sample' to indicate the sample, but instead of >>> writing the command over and over for each sample, I tried to do this >>> with a -foreach- loop, something like this: >>> >>> egen local sample_level = levelsof(sample) >>> >>> foreach n of sample_level { >>> logistic outcome var1 var2 var3 if sample_level==`n', vce(cluster id) >>> } >>> >>> As always, I would appreciate your help. >>> >>> Thanks, >>> Milena >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/faqs/resources/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/faqs/resources/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/faqs/resources/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/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: -foreach- loop to fit regression at each level of a variable***From:*Milena Przheska <[email protected]>

**References**:**st: -foreach- loop to fit regression at each level of a variable***From:*Milena Przheska <[email protected]>

**Re: st: -foreach- loop to fit regression at each level of a variable***From:*Sergiy Radyakin <[email protected]>

**Re: st: -foreach- loop to fit regression at each level of a variable***From:*Nick Winter <[email protected]>

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