Re: [Jprogramming] Boxed indices,Message-ID:

[Linda Alvord]

David, I couldn't resist removing all the @'s !  That is nice!

u=: 13 :'([: ([:([:<~.)|:)\ [: |: (A.~ [:i.[:!#)) y'
      '
   v
[: ([: ([: < ~.) |:)\ [: |: (A.~ ([: i. [: ! #))
   
   v 'abcd'
┌─┬──┬───┬────┐
│a│ab│abc│abcd│
│b│ac│abd│abdc│
│c│ad│acb│acbd│
│d│ba│acd│acdb│
│ │bc│adb│adbc│
│ │bd│adc│adcb│
│ │ca│bac│bacd│
│ │cb│bad│badc│
│ │cd│bca│bcad│
│ │da│bcd│bcda│
│ │db│bda│bdac│
│ │dc│bdc│bdca│
│ │  │cab│cabd│
│ │  │cad│cadb│
│ │  │cba│cbad│
│ │  │cbd│cbda│
│ │  │cda│cdab│
│ │  │cdb│cdba│
│ │  │dab│dabc│
│ │  │dac│dacb│
│ │  │dba│dbac│
│ │  │dbc│dbca│
│ │  │dca│dcab│
│ │  │dcb│dcba│
└─┴──┴───┴────┘
   
Linda

-----Original Message-----
From: Programming <programming-boun...@forums.jsoftware.com> On Behalf Of David 
Lambert
Sent: Thursday, December 6, 2018 10:35 AM
To: programming <programm...@jsoftware.com>
Subject: Re: [Jprogramming] Boxed indices,Message-ID:

    |:  (A.~ i.@!@#)  'abcd'  NB. generate the permutationsdirectly 
aaaaaabbbbbbccccccdddddd bbccddaaccddaabbddaabbcc cdbdbccdadacbdadabbcacab 
dcdbcbdcdacadbdabacbcaba


    NB. find the subsets within
    ([: <@~.@|:\ [: |: (A.~ i.@!@#))  'abcd'
┌─┬──┬───┬────┐
│a│ab│abc│abcd│
│b│ac│abd│abdc│
│c│ad│acb│acbd│
│d│ba│acd│acdb│
│ │bc│adb│adbc│
│ │bd│adc│adcb│
│ │ca│bac│bacd│
│ │cb│bad│badc│
│ │cd│bca│bcad│
│ │da│bcd│bcda│
│ │db│bda│bdac│
│ │dc│bdc│bdca│
│ │  │cab│cabd│
│ │  │cad│cadb│
│ │  │cba│cbad│
│ │  │cbd│cbda│
│ │  │cda│cdab│
│ │  │cdb│cdba│
│ │  │dab│dabc│
│ │  │dac│dacb│
│ │  │dba│dbac│
│ │  │dbc│dbca│
│ │  │dca│dcab│
│ │  │dcb│dcba│
└─┴──┴───┴────┘

On 12/6/18 7:00 AM, programming-requ...@forums.jsoftware.com wrote:
> Date: Wed, 5 Dec 2018 19:45:51 -0600
> From: Skip Cave<s...@caveconsulting.com> 
> To:"programm...@jsoftware.com"  <programm...@jsoftware.com>
> Subject: [Jprogramming] Boxed indices
> Message-ID:
>       <caj8lg_dqrajrtogrm0grouokjnjabvhvmguaoa3gd94w9u6...@mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> I want to generate all the 1, 2, 3, & 4 permutations of 4 items.
> I can generate the indices:
>
> (1 2 3 4 perm each 4)
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