Hi Ashta, Take a look at ?rle, e.g. > rle(x1) Run Length Encoding lengths: int [1:4] 2 3 1 1 values : num [1:4] 1 0 1 0 > rle(x1)$lengths [1] 2 3 1 1 > rle(x1)$values [1] 1 0 1 0
HTH, Jorge On Tue, Oct 20, 2009 at 10:10 AM, Ashta <> wrote: > Hi All, > > Assume that I have the following data set with two variables and I > want count the number of observation with identical values and number > of time each factor changed from x1 to x2. > > x1 x2 > 1 1 > 1 0 > 0 1 > 0 1 > 0 0 > 1 1 > 0 1 > > The output should be > x1 changed > 0 3 # has changed 3 times > 1 1 # has changed 1 time > x1 unchanged > 0 1 # has unchanged only 1 time > 1 2 # has unchanged 2 times > > Can someone help me how to do it in R? > > Thanks in advance > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
