"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. Otto ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
