Calculating the maximum of sub-vectors of a larger vector

Question

I would like to find the largest element in a portion of a longer vector. I would also like to perform this calculation for multiple \'pieces\' of this larger vector. The f

Answer 1

This should do the job

cummax(test.vec)

Besides sum, min, max, prod, for which a more efficient routine is built-in, the general strategy might be

Reduce(max, test.vec, accumulate = TRUE)

Answer 2

You might be interested in the cummax function.