Probably just a glitch in what you are looking for in the second example, but 
it can be done with a little processing before using ]\

    4 ]\ i. 7
0 1 2 3
1 2 3 4
2 3 4 5
3 4 5 6
   4 (]\ (, >:@{:)) i.7
0 1 2 3
1 2 3 4
2 3 4 5
3 4 5 6
4 5 6 7

Cheers, bob

> On Feb 19, 2018, at 11:13 AM, Raul Miller <rauldmil...@gmail.com> wrote:
> 
>   3 ]\i.6
> 0 1 2
> 1 2 3
> 2 3 4
> 3 4 5
> 
> Or
>   sw=: ]\
> 
> Thanks,
> 
> -- 
> Raul
> 
> 
> On Mon, Feb 19, 2018 at 2:09 PM, Skip Cave <s...@caveconsulting.com> wrote:
>> How can one create a sliding window in J?
>> 
>> 3 sw i.6
>> 
>> 0 1 2
>> 1 2 3
>> 2 3 4
>> 3 4 5
>> 
>> 4 sw i.7
>> 0 1 2 3
>> 1 2 3 4
>> 2 3 4 5
>> 3 4 5 6
>> 4 5 6 7
>> 
>> What is the J code for sw?
>> 
>> 
>> 
>> 
>> 
>> Skip Cave
>> Cave Consulting LLC
>> ----------------------------------------------------------------------
>> 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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