Hi!
Sorry for asking a trivial questions, but I can't seem to figure this out.
I have a dataframe called master containing 30-odd variables.
In this dataframe, I have observations across these 30 variables from 1930 to 2003 (I've made a "year" variable). How can I drop all rows for which the year is less than 1960? I'm assuming something with ifelse() but I can't quite figure it out.
I would appreciate a suggestion of some syntax.
In R this is called subsetting and the simplest way to do this is with the subset function.
older <- subset(master, year < 1960)
See ?subset for more variations on this theme.
______________________________________________ [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
