Make the last one,
op=. (<^:('' -.@:-: $)@:)("0)/
A ,op B
┌───┬───┬───┬───┐
│0 0│0 1│0 2│0 3│
├───┼───┼───┼───┤
│1 0│1 1│1 2│1 3│
├───┼───┼───┼───┤
│2 0│2 1│2 2│2 3│
└───┴───┴───┴───┘
A %op B
0 0 0 0
_ 1 0.5 0.333333
_ 2 1 0.666667
On Sat, Apr 2, 2016 at 9:50 AM, Jose Mario Quintana <
[email protected]> wrote:
> I forgot, the latter form can also be written as,
>
> op=. (<^:(0 = L.)@:)("0)/
>
>
> On Sat, Apr 2, 2016 at 9:39 AM, Jose Mario Quintana <
> [email protected]> wrote:
>
>> (A=. i.3) ; (B=. i.4)
>> ┌─────┬───────┐
>> │0 1 2│0 1 2 3│
>> └─────┴───────┘
>>
>> One might want to have the results boxed:
>>
>> op=. (<@:)("0)/
>>
>> A ,op B
>> ┌───┬───┬───┬───┐
>> │0 0│0 1│0 2│0 3│
>> ├───┼───┼───┼───┤
>> │1 0│1 1│1 2│1 3│
>> ├───┼───┼───┼───┤
>> │2 0│2 1│2 2│2 3│
>> └───┴───┴───┴───┘
>> A %op B
>> ┌─┬─┬───┬────────┐
>> │0│0│0 │0 │
>> ├─┼─┼───┼────────┤
>> │_│1│0.5│0.333333│
>> ├─┼─┼───┼────────┤
>> │_│2│1 │0.666667│
>> └─┴─┴───┴────────┘
>>
>> One might not:
>>
>> op=. ("0)/
>>
>> A ,op B
>> 0 0
>> 0 1
>> 0 2
>> 0 3
>>
>> 1 0
>> 1 1
>> 1 2
>> 1 3
>>
>> 2 0
>> 2 1
>> 2 2
>> 2 3
>>
>> A %op B
>> 0 0 0 0
>> _ 1 0.5 0.333333
>> _ 2 1 0.666667
>>
>> One might want to have them both ways:
>>
>> op=. (<`]@.('' -: $)@:)("0)/
>>
>> A ,op B
>> ┌───┬───┬───┬───┐
>> │0 0│0 1│0 2│0 3│
>> ├───┼───┼───┼───┤
>> │1 0│1 1│1 2│1 3│
>> ├───┼───┼───┼───┤
>> │2 0│2 1│2 2│2 3│
>> └───┴───┴───┴───┘
>> A %op B
>> 0 0 0 0
>> _ 1 0.5 0.333333
>> _ 2 1 0.666667
>>
>>
>>
>> On Sat, Apr 2, 2016 at 3:11 AM, Gian Medri <[email protected]> wrote:
>>
>>> Hi !
>>>
>>> In J the outer product has the form: a foo/ b.
>>> It doesn't work for comma.
>>> Example
>>> a=: i. 3
>>> b=: i.4
>>> [ a ,/ b
>>> 0 1 2 0 1 2 3
>>> APL
>>> a °. , b
>>> 0 0 0 1 0 2 0 3
>>> 1 0 1 1 1 2 1 3
>>> 2 0 2 1 2 2 2 3
>>>
>>> 3 x 4 boxed result
>>>
>>> Can I have the same result in J as easily as in APL?
>>> Best regards
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>
>>
>>
>
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
