I am not getting good results with to2.
I am playing with the following.
CP=: {@(,&<)
cross =: [: CP &>/< @:i.@>:"0
0 1 -.~&(,&cross) 2 3
┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
│0 2│0 3│1 0│1 1│1 2│1 3│2 0│2 1│2 2│2 3│
└───┴───┴───┴───┴───┴───┴───┴───┴───┴───┘
On Mon, Aug 18, 2014 at 4:25 PM, 'Pascal Jasmin' via Programming <
[email protected]> wrote:
> spreadsheets have a range selection syntax like A1:C3&F4~B2 which means
> the block range from A1 to C3 with the cell F4 added, and the cell B2
> removed.
>
> Ignoring the letter conversions, here are some useful J functions for
> building a list of selectors (can be used with both { and }). Conjunctions
> are used for their power to be higher precedence functions, and reduction
> of parentheses. Perhaps the only really neat feature of this dsl is the
> use of conjunctions, as the functions themselves are pretty simple. At the
> same time, the conjunctions might get in the way if using these functions
> within forks.
>
> the 3 core spreadsheet combiners:
>
> to2 =: ( [: <"1 [: ,."0/&>/ [: i.@:>: each -~)
> to =: 2 : 'm ,@:to2 n'
> and=: ~.@:,&boxopen
> less =: -.&boxopen
>
>
--
(B=)
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
