> 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".
Since x consists solely of 0's and 1's this is same as sum(diff(x)==1) # 3 in your example Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Pete Brecknock > Sent: Saturday, February 18, 2012 11:52 AM > To: [email protected] > Subject: Re: [R] Counting value changes > > > 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. > > ______________________________________________ > [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. ______________________________________________ [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.
