R: [R] removing observations
ottorino-luca.pantani at unifi.it
Fri Aug 13 16:46:56 CEST 2004
"by" is perhaps what you looking for
try to write "?by" for help
>I have a panel data set (25 years) and I would like to break
>it up by year, and run a few tests. How is this done in R?
>In STATA it is quite simple (keep if year =1970). If someone
>could give me an example of how to do it for a single year I
>am sure I could make a little loop to do it for all 25.
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