Find first consecutive pair in vector

["Potgieter, Andries B" <Andries.Potgieter@dpi.qld.gov.au>]

Dear s-list

I want to find the first consecutive pair with the first value >0 and the second value > 200 in the following vector:
X <- c( 204,   -24,   -33,   433, -1123,   565,   366,  -494,   261,   205,  270,   201)
So in this case index 6 and 7 will be the first event and 9,10; 10,11 and 11,12 the others. I want only to select the first time this condition occurs in the vector

Any ideas in how to do it the easy way?

Thanks
Andries

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