[Jprogramming] A little question

[Ricardo Forno]

Thanks. But it now fails with length error when calling numerize with a 
vector left argument:

numerize =: 13 : '(".&.>x{y)x}y'
.............................................
z =: t =. cutopen each ,&' ' each t
t =. 1 2 numerize each t
where z is something like:
┌────────────────┬───────────────┬───────────────┐
│┌─────┬──────┬─┐│┌────┬──────┬─┐│┌──────┬────┬─┐│
││ALPHA│266239│1│││BETA│270271│1│││BROKEN│9288│2││
│└─────┴──────┴─┘│└────┴──────┴─┘│└──────┴────┴─┘│
└────────────────┴───────────────┴───────────────┘
|length error: readpars
|   t=.1 2     numerize each t

----- Original Message ----- 
From: "Devon McCormick" <devonmcc at gmail.com>
To: "J-programming forum" <programming at jsoftware.com>
Sent: Monday, December 23, 2013 12:11 AM
Subject: Re: [Jprogramming] A little question


> If you break down what's happening inside the function with your example:
>   1 2{arg
> +------+-+
> |266239|1|
> +------+-+
>   >1 2{arg
> 266239
> 1
>   ".>1 2{arg
> 266239 1
>
> So this vector gets boxed and put into both places.  If you allow for
> multiple elements in "x", you might do something like this:
>
>   (".&.>1 2{arg) (1 2)}arg
> +-----+------+-++
> |ALPHA|266239|1||
> +-----+------+-++
>
> So,
>
>   numerize =: 13 : '(".&.>x{y)(x)}y'
>
>   ([: {. 0 $ ]) &.> 1 2 numerize arg  NB. Show 0 for numeric, ' ' for
> character arguments.
> +-+-+-+-+
> | |0|0| |
> +-+-+-+-+
>
>
> On Sun, Dec 22, 2013 at 3:22 PM, Ricardo Forno 
> <ricardoforno at tutopia.com>wrote:
>
>> I have this little function:
>> numerize =: 13 : '(<".x{>y)x}y'
>> It makes numeric the contents of the xth box of the y argument. For
>> example, let b:
>> b
>> ┌─────┬──────┬─┐
>> │ALPHA│266239│1│
>> └─────┴──────┴─┘
>>
>> 1 numerize b makes numeric the middle box.
>> Why does it not work with the last two elements of b, namely:
>> 1 2 numerize b
>> but instead inserts a 2.element vector in each of the boxes 1 and 2?
>> Thanks.
>>
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
>
>
>
>
> -- 
> Devon McCormick, CFA
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm