I have in a dataframe X : 3 Variables X$a , X$b, X$c I would like to replace in X the values of X$a by the values of X$c but only when X$b=="TRUE" I have tried to put in place a loop but as I have a lot of rows it is very very long to run.
Thanks for your help -- View this message in context: http://r.789695.n4.nabble.com/Dataframe-and-conditions-tp4667012.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.
