Hi Lauri, here is a little modification of the solution for retrieving the last row only :
score[as.vector(unlist(tapply(rownames(score), score$id, tail, 2))),] giving the last two rows. Replacing 2 by 6 or 10 gives you the last 6 or 10 rows (if they exist). Christian ______________________________________________ [email protected] 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.
