I'm trying to combine/stitch two matrices into a boxed representation. I
tried various ideas for about 45 minutes and this is the best I came up
with.

I need the data to be boxed for another algorithm I'm supplying it to

The output should be a 5 item list of boxed 3x2 arrays with each column
side by side from for each row (3 columns for 2 matrices).

P1 =: "., ;._2 (0 : 0)

32658.00 0.029641 1.00

32658.00 0.505236 1.00

32658.00 0.306204 1.00

32658.00 0.005818 1.00

32658.00 0.153102 1.00

)


P2 =: "., ;._2 (0 : 0)

32130.00 0.01369 1.00568

32130.00 0.51354 1.00000

32130.00 0.31124 1.00000

32130.00 0.00591 1.00000

32130.00 0.15562 1.00000

)


] arr=: |: each <"2 > _3 <\"1 (P1,.P2)


┌────────────────┬────────────────┬────────────────┬────────────────┬────────────────┐

│ 32658 32130│ 32658 32130│ 32658 32130│ 32658 32130│ 32658 32130│

│0.029641 0.01369│0.505236 0.51354│0.306204 0.31124│0.005818
0.00591│0.153102 0.15562│

│ 1 1.00568│ 1 1│ 1 1│ 1 1│ 1 1│

└────────────────┴────────────────┴────────────────┴────────────────┴────────────────┘


NB. A test case / check figure

+/ > */ each arr

32658 32132.5


This is the first box:


> 0{"1 arr

32658 32130

0.029641 0.01369

1 1.00568


It feels like this is a fairly common operation so I am guessing there's a
simpler way than this:


] arr=: |: each <"2 > _3 <\"1 (P1,.P2)


Thanks for any alternate ideas.
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