Hello, I have a column called max_date in my data frame and I only want to keep the bigger values for the same activity. How can I do that?
data frame: activity max_dt A 2013-03-05 B 2013-03-28 A 2013-03-28 C 2013-03-28 B 2013-03-01 Thank you for your help -- View this message in context: http://r.789695.n4.nabble.com/Removing-rows-w-smaller-value-from-data-frame-tp4667816.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
