Oh (so much for hasty glances) -- that will be great! I thought if I had a good tree display I could begin to understand L. and L: . Kip
Roger Hui wrote: > I believe the essay addresses part of your stated problem. > The fns in the essay draw a tree when given the edges. > So if you can produce the necessary edges from a box > array you can use those fns. > > > > ----- Original Message ----- > From: Kip Murray <[email protected]> > Date: Thursday, August 20, 2009 1:49 > Subject: Re: [Jprogramming] Box tree > To: Programming forum <[email protected]> > >> Thank you, I will take a look. Is the "concept" of my >> proposed display >> correct? I have peeked at yours and it appears to be for >> open arrays. (Full >> details of mine are in a post following this one of yours.) >> >> Roger Hui wrote: >>> Have you seen >> http://www.jsoftware.com/jwiki/Essays/Tree%20Display ? >>> >>> >>> ----- Original Message ----- >>> From: Kip Murray <[email protected]> >>> Date: Wednesday, August 19, 2009 11:33 >>> Subject: Re: [Jprogramming] Box tree >>> To: Programming forum <[email protected]> >>> >>>> Answering queries from Raul, here are more example tree >>>> displays. Lovingly >>>> created by hand, these are in organization chart style. >> It >>>> might be better to >>>> rotate them 90 degrees counterclockwise so they open to the >>>> right instead of >>>> down. THERE WAS AN ERROR IN THE ORIGINAL POST, see the >>>> note following the >>>> examples here. >>>> >>>> Array structure is indicated with '.' , box structure with >> 'o', >>>> but leaves are >>>> not shown as trees. Levels are in brackets. >>>> >>>> Can you write a verb that produces a bare tree display -- >> dots >>>> and ohs and >>>> connectors but no levels, leaves, or array name? We can >>>> add those later. >>>> >>>> >>>> ]u =: i.&.>1+i.3 >>>> +-+---+-----+ >>>> |0|0 1|0 1 2| >>>> +-+---+-----+ >>>> >>>> u >>>> ________._[1]____ >>>> | | | >>>> | | | >>>> o [0] o [0] o [0] >>>> 0 0 1 0 1 2 >>>> >>>> >>>> ]v =: i.&.>1+i. 2 2 >>>> +-----+-------+ >>>> |0 |0 1 | >>>> +-----+-------+ >>>> |0 1 2|0 1 2 3| >>>> +-----+-------+ >>>> >>>> v >>>> ______________._[1]___________ >>>> | | >>>> | | >>>> ________._[1]____ ________._[1]____ >>>> | | | | >>>> | | | | >>>> o [0] o [0] o [0] o [0] >>>> 0 0 1 0 1 2 0 1 2 3 >>>> >>>> >>>> ]w =: i.&.>1+i. 2 2 2 >>>> +-------------+---------------+ >>>> >> |0 |0 1 | >>>> +-------------+---------------+ >>>> |0 1 2 |0 1 2 >>>> 3 | >>>> +-------------+---------------+ >>>> >>>> +-------------+---------------+ >>>> |0 1 2 3 4 |0 1 2 3 4 5 | >>>> +-------------+---------------+ >>>> |0 1 2 3 4 5 6|0 1 2 3 4 5 6 7| >>>> +-------------+---------------+ >>>> >>>> w >>>> ____________________._[1]_________________ >>>> | | >>>> | | >>>> >>>> >> ________._[1]_____ __________._[1]_____ >>>> >>>> >> | | | | >>>> >>>> >> | | | | >>>> >> ______._[1]__ >> ____._[1]__ ____._[1]_ ___._[1]_ >> | | | | | | | | >> | | | | | | | | >>>> o [0] o >>>> [0] o [0] o >>>> [0] o >> [0] >>>> o [0] o [0] o [0] >>>> >> 0 0 1 0 1 2 0 1 2 3 0 1 2 ... 0 1 2 ... 0 1 2 ... 0 1 2 >> ... >>>> >>>> See the original post (below) for an example of more >> complicated >>>> box structure. >>>> THE TREE DISPLAY THERE IS IN >> ERROR, >>>> because one of the boxes contained a >>>> list of boxes, and that list should have been shown with a >> '.' >>>> just beneath the >>>> 'o' where where the [2] marker is, with the rest of that side >>>> emanating from the >>>> '.'. The correct display of the list is like that in >> the >>>> first example above. >>>> In a later post I will correct the display, changing to the >> now >>>> preferred >>>> organization chart style. >>>> >>>> >>>> Kip Murray wrote: >>>>> Here is an array from the L: Level At page in the >>>> Dictionary. Below is a tree >>>>> display representing the array and showing levels (square >>>> brackets) and leaves. >>>>> Your mission, should you decide to accept it, is to write a >>>> verb boxtree such >>>>> that "boxtree array" produces as much of the tree display as >>>> is practical. >>>>> To begin with, just produce the bare tree. Each 'o' >>>> represents a box. We can >>>>> work on adding level markers, leaves, and the name of the >>>> array later. >>>>> I hope the array and tree display well in your email >>>> reader. I sent them in >>>>> Unicode Courier New as defined by Microsoft's WordPad and >>>> transformed by >>>>> Thunderbird (email program). >>>>> >>>>> Kip >>>>> >>>>> ] y=: (<<2 3 >>>> 4),<(5 6 ; <<i. 2 3) >>>>> +-------+-------------+ >>>>> |+-----+|+---+-------+| >>>>> ||2 3 4|||5 6|+-----+|| >>>>> |+-----+|| ||0 1 2||| >>>>> | || ||3 4 5||| >>>>> | || |+-----+|| >>>>> | |+---+-------+| >>>>> +-------+-------------+ >>>>> >>>>> >>>>> y >>>>> . [3] >>>>> / \ >>>>> / \ >>>>> / \ >>>>> / \ >>>>> / \ >>>>> / \ >>>>> / \ >>>>> >> [1] >> o o [2] >>>>> | / \ >>>>> | / \ >>>>> | / \ >>>>> | / \ >>>>> >> [0] >>>> o [0] >>>> o o [1] >>>>> 2 3 4 5 6 | >>>>> | >>>>> | >>>>> o [0] >>>>> 0 1 2 >>>>> 3 4 5 > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
