Talk:Spiral matrix: Difference between revisions

(added J explanatation)
Line 28:
1 1 1 1 1 5 5 5 5 _1 _1 _1 _1 _5 _5 _5 1 1 1 5 5 _1 _1 _5 1
sumscan =: +/\ NB. Cumulative sum
sumscan 10 1 12 1 13 4
10 21 3 46 510
(counts sumscan@copy values) 5
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