is there a way to look for value changes in a column? set.seed(144) df<-data.frame(state=sample(rep(1:5,200),1000))
any of the five states are acceptable. however if, for example, states 4 or 5 follow state 3, i want to overwrite them with 3. changes from 1 to any value and 2 to any value are acceptable as are changes from any value to 1 or 2. By way of an example: the sequence 1 3 3 5 5 3 2 4 2 1 5 3 3 5 should read 1 3 3 3 3 3 2 4 2 1 5 5 5 5 Thanks for the help! Justin ______________________________________________ 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.
