8 ($@] #: [ I.@:= ,@]) A 1 3 8 (4 $. $.@:= ) A 1 3 Note that both of these results are rank 2.
-- Raul On Tue, Dec 26, 2023 at 8:32 PM David Pinchbeck <dpinc...@gmail.com> wrote: > > Having trouble finding this in the wiki: I know that we can select from a > table using a boxed pair > > A > > 0 1 2 3 4 > > 5 6 7 8 9 > > 10 11 12 13 14 > > 15 16 17 18 19 > > 20 21 22 23 24 > > > (<1 3){A > > 8 > > How do I write a verb f to do the reverse, so that > 8 f A > yields the result 1 3 ? > > Thanks, > David > -- > David Pinchbeck > Associate Professor of Mathematics > St. Joseph's College > Standish, ME > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm