"Justin G. Gardner" <[EMAIL PROTECTED]> writes: > Hello R list. > > I am sure this is an easy question, please forgive my > ignorance of R. > > > 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.
There are multiple answers, mostly involving the subset(), tapply(), or by() functions. So use help(subset), etc. -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [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
