My tree code can be found here: https://github.com/DevonMcC/trees .
On Mon, Jul 20, 2020 at 4:20 PM Devon McCormick <[email protected]> wrote: > I meant the J essay suggested by Jan-Pieter was the one I used. > > On Mon, Jul 20, 2020 at 4:00 PM Devon McCormick <[email protected]> > wrote: > >> It was simple to convert my parent-index form to use with the tree >> display function "tree": >> nmsb=. >> 'C:';'n0';'n1';'n00';'n01';'n10';'n11';'n12';'n100';'n110';'n111';'n112' >> NB. Node names >> trb=. _1 0 0 1 1 2 2 2 5 6 6 6 NB. Parent-index tree >> EW=: {: BOXC=: 11{.16}.a. NB. Line-drawing characters >> tree (}.trb{nmsb),.}.nmsb >> +----------------------------+ >> | ┌─ n00 | >> | ┌─ n0 ─┴─ n01 | >> | │ ┌─ n10 ─── n100| >> |─ C: ─┤ │ ┌─ n110| >> | └─ n1 ─┼─ n11 ─┼─ n111| >> | │ └─ n112| >> | └─ n12 | >> +----------------------------+ >> >> >> On Mon, Jul 20, 2020 at 3:54 PM Devon McCormick <[email protected]> >> wrote: >> >>> Thanks everyone for the responses. I have watched the APL video >>> recently but have not tried to convert Aaron's code to J. However, the >>> essay suggested by Julian does what I want. >>> Bo's response is intriguing but I have not figured out how to convert my >>> tree representation to ordinal numbers. >>> >>> On Mon, Jul 20, 2020 at 1:40 PM 'Bo Jacoby' via Programming < >>> [email protected]> wrote: >>> >>>> Minor simplification: >>>> >>>> n=.(/:{])12 3$'000100200110120210220230211221222223' >>>> >>>> (6-~+/"1 n='0')|."0 1 n,"1'00',(4#' '),'§' >>>> >>>> >>>> >>>> Thanks. >>>> Bo. >>>> Den søndag den 19. juli 2020 23.49.17 CEST skrev 'Bo Jacoby' via >>>> Programming <[email protected]>: >>>> >>>> I use ordinal fractions. >>>> >>>> >>>> >>>> nms=.'000';'100';'200';'110';'120';'210';'220';'230';'211';'221';'222';'223' >>>> >>>> >>>> >>>> The digits are ordinal numbers, 1, 2, 3, . . . rather than cardinal >>>> numbers 0, 1, 2, . . . >>>> The digit zero means everything rather than nothing. >>>> >>>> >>>> >>>> nms=.'000','100','200','110','120','210','220','230','211','221','222',:'223' >>>> >>>> nms=.(/:nms){nms NB. sort >>>> >>>> (3-~+/"1 nms='0')|."0 1 nms,"1' ' >>>> >>>> 000 >>>> >>>> 100 >>>> >>>> 110 >>>> >>>> 120 >>>> >>>> 200 >>>> >>>> 210 >>>> >>>> 211 >>>> >>>> 220 >>>> >>>> 221 >>>> >>>> 222 >>>> >>>> 223 >>>> >>>> 230 >>>> >>>> >>>> >>>> >>>> This is not the J concept of array, but something else. >>>> >>>> Den søndag den 19. juli 2020 22.13.08 CEST skrev Devon McCormick < >>>> [email protected]>: >>>> >>>> Does anyone have a good way to display a tree in J? EG >>>> C: >>>> |__n0 >>>> | |_n00 >>>> | |_n01 >>>> | >>>> |__n1 >>>> |__n10 >>>> | |__n100 >>>> |__n11 >>>> | |__n110 >>>> | |__n111 >>>> | |__n112 >>>> |__n12 >>>> for a tree in parent index form: >>>> tr=. _1 0 0 1 1 2 2 2 5 6 6 >>>> 6 >>>> nms=. >>>> 'C:';'n0';'n1';'n00';'n01';'n10';'n11';'n12';'n100';'n110';'n111';'n112' >>>> Where "tr" is the parent-index form (with _1 for the root) and "nms" are >>>> the names of each node. >>>> >>>> Any other neat representation of a tree would also be appreciated. >>>> >>>> Thanks, >>>> >>>> Devon >>>> >>>> -- >>>> >>>> Devon McCormick, CFA >>>> >>>> Quantitative Consultant >>>> ---------------------------------------------------------------------- >>>> For information about J forums see http://www.jsoftware.com/forums.htm >>>> >>>> ---------------------------------------------------------------------- >>>> For information about J forums see http://www.jsoftware.com/forums.htm >>>> >>>> ---------------------------------------------------------------------- >>>> For information about J forums see http://www.jsoftware.com/forums.htm >>>> >>> >>> >>> -- >>> >>> Devon McCormick, CFA >>> >>> Quantitative Consultant >>> >>> >> >> -- >> >> Devon McCormick, CFA >> >> Quantitative Consultant >> >> > > -- > > Devon McCormick, CFA > > Quantitative Consultant > > -- Devon McCormick, CFA Quantitative Consultant ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
