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 >
On Sat, Feb 18, 2012 at 7:33 PM, Sarah Goslee <sarah.gos...@gmail.com> wrote: > Just for clarity, I changed your x a bit - in your version, the 0-1 and 1-0 > change occurred the same number of times. > > If all your values are 0 and 1, this will work: > >> x <- c(0,1,0,1,0,0,0,1,1,1) >> table(diff(x)) > > -1 0 1 > 2 4 3 >> sum(diff(x) == 1) > [1] 3 > > If other values can occur, it would need some tweaking. > > Sarah > > On Sat, Feb 18, 2012 at 2:09 PM, maris478 <maris...@gmail.com> 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. > > -- > Sarah Goslee > http://www.functionaldiversity.org > > ______________________________________________ > 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.
