[Jprogramming] one element list of an integer to an atom

[Ric Sherlock]

To reduce the dimensions of an array in J I tend to use ( ,/ myarray)
   $ ,3
1
   $ ,/ ,3



On Thu, Mar 29, 2012 at 9:19 PM, Linda Alvord <lindaalvord at verizon.net> wrote:
>   a=:1$3
>    a
> 3
>    3= 2 3 5 3 4
> 0 1 0 1 0
>   a= 2 3 5 3 4
> |length error
> |   a    =2 3 5 3 4
>
>   ".a
> |domain error
> |       ".a
>   a+5
> 8
>
> Clearly, a is numeric. How can I change  a  to a numeric atom  3 , rather
> than a one element list  3 ?
>
> I need to find where the 3's are in a list. The result of executing some
> expression has produced a one item list of a  3 .
>
> I think I may have known how in APL once upon a time.
>
> Linda
>
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