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

[Nick Winter <njgwinter@gmail.com>]

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
> <milena.przheska@cosmicdevelopment.com> 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/