Counting value changes
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.Brecknock at 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.
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