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| From | Maarten Buis <maartenlbuis@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Addressing variables |
| Date | Wed, 14 Sep 2011 17:00:08 +0200 |
On Wed, Sep 14, 2011 at 4:08 PM, Christopher Garlich wrote: > I have tried that already and it just returns: "ambiguous abbreviation". I > also tried it with a macro, namely: > Local i i > And when I then try "avg = rowmean(Lag1 - Lag`i')", STATA actually > interprets it as lag"i", but not with value of variable i. > So my problem persists, I'm not able to address the value of i. Sounds to me like you haven't assigned values to the local macro i. When Stata evaluates a statement like -Lag`i'- it replace `i' with its contents. If no contents was specified it adds nothing and -Lag`i'- evaluates to -Lag-, which in your case is an ambiguous abbreviation. Assigning it the contents "i", which is what you did when typing -local i i-, lead to -Lag`i'- to be evaluated as -Lagi-, which apparently does not exist in your data. What you seem to want is: local i = 5 egen avg = rowmean(Lag1 - Lag`i') 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/