[Jprogramming] Sliding window

[Skip Cave]

Thanks to all the informative responses. I knew there had to be a way to
use \ for the sliding window, but
it didn't occur to me to use ] to access the right argument.

so

]\1 2 3

1 0 0

1 2 0

1 2 3

but

1 2 3\1 2 3

|domain error

| 1 2 3 \1 2 3

I thought that  ] replicated the right argument, but appaently not.

Why does the first example work, and the second doesn't?
What exactly is the ] doing in the first example?

Skip


Skip Cave
Cave Consulting LLC

On Mon, Feb 19, 2018 at 1:09 PM, Skip Cave <skip at 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
>