{.@;: t
----- Original Message -----
From: Roger Hui <[email protected]>
Date: Saturday, February 13, 2010 21:00
Subject: Re: [Jprogramming] Slicing and dicing a 2D char mx
To: Programming forum <[email protected]>
> How do you do it in APL? Translate it into J.
>
> Alternatively, your table t is a very special table
> and so admits some special phrases. e.g.
>
> {."1 ;: t
>
>
>
> ----- Original Message -----
> From: Ian Clark <[email protected]>
> Date: Saturday, February 13, 2010 20:50
> Subject: [Jprogramming] Slicing and dicing a 2D char mx
> To: Programming forum <[email protected]>
>
> > 1. If I have a M-by-N table with entries like this (you may
> recognise> the example ;)...
> >
> > ...
> > {. curlylfdot
> > {: curlylfco
> > {:: curlylfcoco
> > } curlyrt
> > ...
> >
> > how do I neatly slice off the first 3 columns (say) into a
> boxed list
> > of tally M to serve as a lookup index?
> > Ditto any given field, i.e. set of columns?
> > I'm often doing it, but a different way each time, and the
> > methods I
> > use are cumbersome.
> >
> > 2. Is there already a slice'n'dice cookbook on the wiki, to
> give quick
> > answers to questions like this?
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