Roger posed:
> What is the shortest expression you know of for computing
> the average of a vector v? (Shortest = fewest words.)
Someone at Vector may've been reminiscing about the same puzzle; check out the
APL and J examples in the big yellow box at the top of their front page:
http://www.vector.org.uk/
> The J answer is shorter than the APL answer.
This is due to the verb train innovation; i.e. tacit code. The sole difference
is that APL must name the vector twice.
-Dan
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