Running sum

Perhaps I'm missing something, but isn't the maximum of the cumulative
sum simply the last value, ie. sum(x)?

Hadley

Indeed!

And...going back to Sean's original post he did write:

"I just need max(Y)."

Thus, a whole group of us (independently) managed to over-engineer the
solution. 

Presuming of course, that Sean does not require the entire cumulative
sum vector for other purposes.

I wonder what that says about human cognition....

Thanks,

Marc
<Cleaning his bi-focals...>