Even nicer. I can see I'll be using this a lot.
On Sun, Feb 14, 2010 at 5:34 AM, Roger Hui <rhui...@shaw.ca> wrote:
> {.@;: t
>
>
>
> ----- Original Message -----
> From: Roger Hui <rhui...@shaw.ca>
> Date: Saturday, February 13, 2010 21:00
> Subject: Re: [Jprogramming] Slicing and dicing a 2D char mx
> To: Programming forum <programming@jsoftware.com>
>
>> 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 <earthspo...@googlemail.com>
>> Date: Saturday, February 13, 2010 20:50
>> Subject: [Jprogramming] Slicing and dicing a 2D char mx
>> To: Programming forum <programming@jsoftware.com>
>>
>> > 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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