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| From | brendan.halpin@ul.ie (Brendan Halpin) |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Question about getting residuals by group |
| Date | Wed, 20 Jun 2012 17:46:36 +0100 |
On Wed, Jun 20 2012, Pradipto Banerjee wrote: > Thanks, Joerg. It may work, but looping may slow down my code. Any other > suggestion for a faster operation than using a loop, e.g. any idea if > this can be done using matrix manipulations? This loop is looping over the GroupID variable, so it is not going to be a major issue, as distinct from looping over the cases. In fact, it is just emulating the "by GroupID:" phrase. Another approach would be to fit your separate models by interaction: . regress DependVar##GroupID IndepVar##GroupID . predict PredictVar Brendan -- Brendan Halpin, Department of Sociology, University of Limerick, Ireland Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F1-009 x 3147 mailto:brendan.halpin@ul.ie ULSociology on Facebook: http://on.fb.me/fjIK9t http://teaching.sociology.ul.ie/bhalpin/wordpress twitter:@ULSociology * * 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/