[R] Counting value changes

[Pete Brecknock]

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

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