I wonder how the following is explained with rank:
< i. 2 2
┌───┐
│0 1│
│2 3│
└───┘
<"1 i. 2 2
┌───┬───┐
│0 1│2 3│
└───┴───┘
The posted explanations seem to be missing something...
On 6/8/2011 11:21 PM, Ian Clark wrote:
> Thank you, Kent, for posing a newbie question that crystallises the
> essence of Rank ("). And thanks to those who've offered an answer.
>
> I was just about to supply the content for the NuVoc entry on Rank:
> http://www.jsoftware.com/jwiki/Vocabulary/quote
> Your micro-example spotlights exactly what a novice needs to be told
> about it. I shall use it.
>
>
>
> On Wed, Jun 8, 2011 at 10:47 PM, Henry Rich<[email protected]> wrote:
>> You almost had it. I've fixed the error below.
>>
>> Henry Rich
>>
>> On 6/8/2011 5:41 PM, Squint6 wrote:
>>> Hi,
>>>
>>>
>>> I have just started with J and I have a question concerning rank (I think).
>>>
>>>
>>> I don't understand why the following does what it does:
>>>
>>>
>>> a=. 2 2 $ i.4
>>>
>>>
>>> b=.+/a
>>>
>>>
>>> c=.+/"1 a
>>>
>>>
>>> After executing these lines
>>> a contains
>>> 0 1
>>> 2 3
>>> b contains 2 4 and
>>> c contains 1 5
>>>
>>>
>>> I understand where b is coming from but c's value confuses me. Here's how
>>> my (faulty) reasoning about c=.+/"1 a goes.
>>> The "1 applies to the verb (+/) giving it a rank of 1. Therefore (+/) is
>>> applied to the 1-cells of a,
>>> which I believe are the lists (0 1) and (2 3).
>> ERROR FIXED HERE:
>>> Therefore we have (+/ 0 1) , (+/ 2 3)
>>>
>>>
>>> Thanks.
>>> Kent
>>>
>>>
>>>
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>>
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
>>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
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