a=: 10 20 30 40 b=: 3 6 9 12
NB. Form a conjunction which selects elements NB. from x and y and finds their inner productNB. then construct the verb. Like June Kim's NB. solution it permits a wide range of cases.
conj =: 2 : 0
:
(m{x) +/ . * n{y
)
conjv =: (0 conj 0),(0 1 conj 1 3),(2 3 conj 0 2),2 3 conj 1 3
a conjv b
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