Justin Haynes <jtor14 <at> gmail.com> writes: > > is there a way to look for value changes in a column? > > 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 >
Additionally, can i count the number of times my vector changes to a number? in my previous example i would like to see state count 1 2 2 2 3 1 4 1 5 1 > 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.
