The perm in the addon library is dyadic:

2 perm 4

0 1

1 0

0 2

2 0

0 3

3 0

1 2

2 1

1 3

3 1

2 3

3 2

Skip Cave
Cave Consulting LLC


On Mon, May 25, 2020 at 4:23 PM Skip Cave <[email protected]> wrote:

> Actually you can just say load 'stats' and get perm, comb, and much more.
>
> When I do a Google search on: site:jsoftware.com perm
> I get: https://code.jsoftware.com/wiki/Addons/stats/base/sampledesign
>
>
> Skip Cave
> Cave Consulting LLC
>
>
> On Mon, May 25, 2020 at 4:05 PM Ric Sherlock <[email protected]> wrote:
>
>> Skip, that seems like a very old version of the stats/base addon?
>> According to GitHub the sampledesign script was renamed to combinatorial
>> back in 2008.
>> perm is currently available in ~addons/stats/base/combinatorial.ijs
>> (stats/base/combinatorial)
>>
>> On Tue, May 26, 2020 at 8:45 AM Skip Cave <[email protected]>
>> wrote:
>>
>> > Perm is in Addons/stats/base/sampledesign.
>> >
>> > perm
>> >
>> > 3 : 0
>> >
>> > z=. i.1 0
>> >
>> > for. i.y do. z=. ,/ (0 ,. 1 + z) {"2 1 \:"1 = i. 1 + {: $z end.
>> >
>> > :
>> >
>> > ,/ ({~ perm@#)"1 x comb y
>> >
>> > )
>> >
>> >
>> >
>> > Skip Cave
>> > Cave Consulting LLC
>> >
>> >
>> > On Mon, May 25, 2020 at 3:23 PM Brian Schott <[email protected]>
>> > wrote:
>> >
>> > > Skip,
>> > > I am having trouble finding perm.
>> > > I tried using A. in its place, but did not succeed.
>> > > But I think I see where you were going. Good idea.
>> > >
>> > > On Mon, May 25, 2020 at 2:54 PM Skip Cave <[email protected]>
>> > wrote:
>> > >
>> > > > ssmb=:+./@E.
>> > > >
>> > > > l21=.-.1 1 ssmb"1+./"2]1 2=/"1 n=.perm 4
>> > > >
>> > > > l30=.-.1 1 ssmb"1+./"2]0 3=/"1 n
>> > > >
>> > > > n#~l30*.l21
>> > > >
>> > > >
>> > > ----------------------------------------------------------------------
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>> http://www.jsoftware.com/forums.htm
>> > >
>> > ----------------------------------------------------------------------
>> > For information about J forums see http://www.jsoftware.com/forums.htm
>> >
>> ----------------------------------------------------------------------
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>>
>
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