On Aug 13, 2010, at 1:03 PM, TGS wrote:
# how would I code in R to look at the letter of the alphabet # in the second column and create a indicator column for the # corresponding letter? data(InsectSprays) InsectSprays$spray
It's already what most people mean when they say "indicator column", i.e., a factor variable (and not a character vector) .... so, what do _you_ mean?
-- David Winsemius, MD West Hartford, CT ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
