Trying larger lists:
]x=.31 16 45;3 19 16 4;30 14 46 14 20;34; 41 39 23;30 9 36 9 32; 46 20 30
44;44 35 49 23
│31 16 45│3 19 16 4│30 14 46 14 20│34│41 39 23│30 9 36 9 32│46 20 30 44│44
35 49 23│
Henry's proposal doesn't work for larger list
$,/>{x
12 5 3 5 4 4 8
But Chris' does:
$>,{x
14400 8
Skip Cave
On Sun, Dec 20, 2020 at 12:48 PM Skip Cave <[email protected]> wrote:
> I have three lists stored in x:
>
> ]x=.1 3 5;2;3 4
>
> ┌─────┬─┬───┐
>
> │1 3 5│2│3 4│
>
> └─────┴─┴───┘
>
> I want to find all possible combinations of the elements of these lists
> (taking one from each list).
>
> Using the odometer function I can generate all the possible index
> combinations of selections from those three lists:
>
>
> odo ;# each x
>
> 0 0 0
>
> 0 0 1
>
> 1 0 0
>
> 1 0 1
>
> 2 0 0
>
> 2 0 1
>
>
> Now I can individually find each selection from the three lists
>
>
> ;0 0 0{ea { >x
>
> 1 2 3
>
> ;0 0 1{ea { >x
>
> 1 2 4
>
> ;1 0 0{ea { >x
>
> 3 2 3
>
> ;1 0 1{ea { >x
>
> 3 2 4
>
> ;2 0 0{ea { >x
>
> 5 2 3
>
> ;2 0 1{ea { >x
>
> 5 2 4
>
>
> How can I generate all of the selections in one 6x3 matrix using just one
> statement, with no explicit looping?
>
>
> Skip
>
> Skip Cave
>
>
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