Dear J Forum:
I want to box a vector of numbers and want to box according to another
vector that tells how many to put in the boxes. For example, 11 12 13 14 15
BoxAccTo 3 0 2 means (11 12 13); ace; (14 15). It's important that zeroes
produce empty boxes. Also, +/ of the second vector must equal # of the
first.
I've created a tacit function that does the job. However, I suspect that
it's inefficient. In particular, it doesn't use the cut primitive (;),
because cut doesn't like boxing 0 elements. So I hope that you can come up
with simpler, more efficient tacit functions. Thanks.
Sincerely,
Leigh
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