On Feb 19, 2012, at 04:25 , jim holtman wrote: > For completeness, if you want to count all possible four transitions: > >> x <- c(0,1,0,1,0,0,0,1,1,1,0,0,0,1) >> # lets keep count of the 4 different transitions that can happen >> indx <- cbind(head(x, -1), tail(x, -1)) %*% c(2, 1) >> table(indx) # 0=0-0, 1=0-1, 2=1-0, 3=1-1 > indx > 0 1 2 3 > 4 4 3 2 >>
Um, why not just this? > table(from=head(x, -1), to=tail(x, -1)) to from 0 1 0 4 4 1 3 2 -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.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.