try this: > x <- c(0,1,0,1,0,0,0,0) > sum(diff(x) == 1) [1] 2
On Sat, Feb 18, 2012 at 2:51 PM, Pete Brecknock <peter.breckn...@bp.com> wrote: > > maris478 wrote >> >> Good afternoon, >> I've encountered a little bit of a problem, would appreciate any help >> here. >> >> I made a small vector consisting of ones and zeros. >> Something like this x <- c(0,1,0,1,0,0,1,0), and all I need is to count >> how many times "0" becomes "1". >> Tried various, of what I thought, methods with built in functions. Didn't >> get any further. >> >> Thank you very much. >> > > How about ... > > x <- c(0,1,0,1,0,0,0,0) > > sum(rle(x)$values) > > HTH > > Pete > > -- > View this message in context: > http://r.789695.n4.nabble.com/Counting-value-changes-tp4400267p4400348.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. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ 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.
