Thanks William, that works fantastically! I had a quick play with my data and have realised a potential problem in that if an individual ends the series at home it records an additional trip-no when one wasnt made. I was wondering whether you could think of a way to alter it slightly so that the increment works on the 0 rather than the 1;
for example: land<-c(0,0,0,0,1,1,1,0,0,0,1,1,0,0,0,0) the "trip_no" sequence produced would be 1,1,1,1,1,1,1,2,2,2,2,2,3,3,3,3 Many thanks -- View this message in context: http://r.789695.n4.nabble.com/conditional-increase-by-increment-tp4636910p4637029.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.
