> Henry's proposal doesn't work for larger list
> $,/>{x
> 12 5 3 5 4 4 8
which looks like it does work since 14400 = */12 5 3 5 4 4 . It's the same
number of items.
On Sun, Dec 20, 2020 at 5:42 PM Skip Cave <[email protected]> wrote:
> 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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>
--
Devon McCormick, CFA
Quantitative Consultant
----------------------------------------------------------------------
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