Hi Edward,
Are using a version of J that is expecting x. and y. instead of x and y?
I tried
a=: 1 : 0
:
x u y
)
in J602 and had no problem, but when I put in x. instead of x (and I am not
using the x. option) I get a spelling error.
Hope this helps, bob
On 2012-02-14, at 11:25 AM, Raul Miller wrote:
> Example=: 1 :0
> :
> (u x) + u y
> )
>
> You put the monadic case before the : and the dyadic case after. If
> you want to do that on one line:
>
> 1 :(':'; '(u x) + u y')
>
> --
> Raul
>
> On Tue, Feb 14, 2012 at 2:12 PM, Edward Mokurai Cherlin
> <moku...@sugarlabs.org> wrote:
>> I am unable to determine how to write an explicit J adverb that
>> produces a dyadic verb. There is an example of an explicit conjunction
>> at
>>
>> http://www.rogerstokes.free-online.co.uk/13.htm
>>
>> H =: 2 : 0
>> :
>> (u x) + (v y)
>> )
>> 2 (*: H %:) 16
>> 8
>>
>> and other such constructions work with no problems.
>>
>> However,
>>
>> a=.1 : 0
>> :
>> x u y
>> )
>> |spelling error
>> | x u y
>> | ^
>> | a=. 1 :0
>>
>> a=.1 : 'x u y'
>> a
>> 1 : 'x u y'
>> 2 +a 3
>> |domain error
>> | 2 +a 3
>>
>> Of course, I could write
>>
>> a=.1 : '[ u ]'
>>
>> but that would require reordering topics in the J version of Iverson's
>> Algebra: An Algorithmic Treatment that I am editing, and would still
>> leave the mystery.
>> --
>> Edward Mokurai (默雷/धर्ममेघशब्दगर्ज/دھرممیگھشبدگر ج) Cherlin
>> Silent Thunder is my name, and Children are my nation.
>> The Cosmos is my dwelling place, the Truth my destination.
>> http://wiki.sugarlabs.org/go/Replacing_Textbooks
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