But if I carry on writing myself a task-oriented cookbook of
slice'n'dice for a char table, surely i'll be reinventing the wheel?
Ian
On Sun, Feb 14, 2010 at 5:51 AM, Ian Clark <earthspo...@googlemail.com> wrote:
> 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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>
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