>From the Wiki it looks as if the 'tree display' could have all sorts of useful applications; a Family-Tree and Corporate-Structure quickly come to mind.
What would be required so that the branches/leaves could be displayed as boxed 2 dimensional lists. That would allow: John W. Smith V.P. Sales Ext 1234 Or am I just dreaming! David On Mon, 2008-05-19 at 09:12 -0700, Jose Mario Quintana wrote: > A directed tree can be rerooted at any of its nodes. For example, t1 from > http://www.jsoftware.com/jwiki/Essays/Tree_Display , > > > |:t1 > 0 0 1 2 2 3 3 4 4 4 4 5 5 6 6 6 6 7 7 > 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 > tree t1 > +----------------------------+ > | ┌─ 14| > | ├─ 15| > | ┌─ 6 ─┼─ 16| > | │ └─ 17| > | ┌─ 1 ─── 3 ─┤ ┌─ 18| > | │ └─ 7 ─┴─ 19| > | │ ┌─ 8 | > |─ 0 ─┤ ├─ 9 | > | │ ┌─ 4 ─┼─ 10 | > | │ │ └─ 11 | > | └─ 2 ─┤ ┌─ 12 | > | └─ 5 ─┴─ 13 | > +----------------------------+ > > Can be rerooted at 3 as, > > tree t2=. 3 reroot t1 > +----------------------------------+ > | ┌─ 14 | > | ├─ 15 | > | ┌─ 6 ─┼─ 16 | > | │ └─ 17 | > | │ ┌─ 18 | > | ├─ 7 ─┴─ 19 | > |─ 3 ─┤ ┌─ 8 | > | │ ├─ 9 | > | │ ┌─ 4 ─┼─ 10| > | │ │ └─ 11| > | └─ 1 ─── 0 ─── 2 ─┤ ┌─ 12| > | └─ 5 ─┴─ 13| > +----------------------------------+ > > |:t2 NB. (reroot rendering t2 or equivalent) > 3 3 6 6 6 6 7 7 3 1 0 2 2 4 4 4 4 5 5 > 6 7 14 15 16 17 18 19 1 0 2 4 5 8 9 10 11 12 13 > > > Has any J version of reroot been made public already? > > > ----- Original Message ---- > From: Roger Hui <[EMAIL PROTECTED]> > > Nothing new under the sun. > http://groups.google.com/group/comp.lang.apl/browse_thread/thread/5f1c1df7bd72fe51/32691205433c3152?lnk=gst#32691205433c3152 > > ----- Original Message ----- > From: Roger Hui <[EMAIL PROTECTED]> > > > http://www.jsoftware.com/jwiki/Essays/Tree_Display > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
