[R] identifying a 'run' in a vector

[B77S]

well.. the following works, but if you have another idea I am still
interested. 

1:(which(diff(x)!=1)[1])







B77S wrote:
> 
> Hi, 
> 
> How can I discern which elements in x (see below) are in 'order', but more
> specifically.. only the 1st 'ordered run'?
> I would like for it to return elements 1:8... there may be ordered values
> after 1:8, but those are not of interest.
> 
> x <- c(1, 2, 3, 4, 5, 6, 7, 8, 20, 21, 22, 45)
> 
> 
> Thanks for any suggestions.
> 

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