hyperoperators and multi-dimensional datastructures

[Anthony Heading]

Is there a way to target hyperoperators at different axes of a
multi-dimensional array?  This is an attractive feature of
various APL-like languages, viz. e.g. in J:
   a =. 2 5 $ i. 7      - a simple 2-by-5 array
   a
0 1 2 3 4               - like this
5 6 0 1 2
   +/"1 a              - sum reduce over axis 1
10 14
   +/"2 a          - sum reduce over axis 2
5 7 2 4 6
Anthony