Bill
This is basically an old APL idiom;
>./\([EMAIL PROTECTED])0 1 0 1 0 0 1 0 0 0 1 0
0 1 1 3 3 3 6 6 6 6 10 10
or
(>./\@:[EMAIL PROTECTED])0 1 0 1 0 0 1 0 0 0 1 0
0 1 1 3 3 3 6 6 6 6 10 10
if you want it all in one verb
or, using a j-only primitive
(>./\@:(#^:_1 I.))0 1 0 1 0 0 1 0 0 0 1 0
0 1 1 3 3 3 6 6 6 6 10 10
Mike
bill lam wrote:
A related question, how to transform it into index to the firststone
of the
group, assuming at least a '1' exist,
eg. from this boolean array
0 1 0 1 0 0 1 0 0 0 1 0
I want the array
0 1 1 3 3 3 6 6 6 6 10 10
I can do it but not elegant.
regards,
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