Try this: rle(x)$length
On Mon, Feb 22, 2010 at 2:27 PM, Larson, TR <t...@york.ac.uk> wrote: > Hello, > I have a very long (~50,000) sequence of repeating numbers. The first 100 > are: > > [1] 0 0 0 0 0 0 0 0 0 0 0 429 > [13] 429 429 429 429 429 429 429 858 858 858 858 858 > [25] 858 1287 1287 1287 1287 1287 1716 2145 2145 2574 2574 > 3003 > [37] 3003 3432 3432 3861 4290 4719 5148 5577 5577 6006 6006 > 6006 > [49] 6435 6435 6435 6864 6864 7293 7293 7293 7722 7722 7722 > 7722 > [61] 8151 8151 8151 8580 8580 8580 9009 9009 9009 9009 9438 > 9438 > [73] 9438 9438 9867 9867 9867 10296 10296 10296 10725 10725 10725 > 10725 > [85] 11154 11154 11154 11154 11154 11583 11583 11583 11583 12012 12012 > 12012 > [97] 12012 12441 12441 12441 > > > What I want is to produce a vector of lengths for each contiguous run of > numbers . i.e. for the above example, the first three items of the vector > returned would be: > > 11 8 6 > > ...to represent the counts of 0, 429, and 585, respectively. I could do > this with unique() and a for loop, but this would be very inefficient. Any > advice on how to do this efficiently would be most appreciated. > > thanks > Tony > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
