Ah cool. Makes me wish I lived closer to NY so I could come by a meeting. :)
Another nice way to make these images is Gerard Langlet's famous xor scan: |."1 ~:/\^:(<32) 32$1 He wrote a number of interesting papers about the properties of xor scans back in the 90's, using APL. (That's actually what got me looking at Sierpinksi matrices in the first place.) On Fri, Jan 9, 2015 at 7:57 AM, Devon McCormick <devon...@gmail.com> wrote: > Yes - I hadn't thought of it as "a bite taken out of it". > > I used this example as an introduction to extended precision here: > http://www.jsoftware.com/jwiki/NYCJUG/Projects/Pascal . > > On Fri, Jan 9, 2015 at 5:26 AM, Michal Wallace <michal.wall...@gmail.com> > wrote: > > > Oh sorry. > > https://github.com/tangentstorm/tangentlabs/blob/master/j/irctoys.ijs > > > > Yeah... 64x or using 2| instead of #: give you the plain sierpinski > > triangle. > > I'm probably just silly but the image with a bite taken out of it cracked > > me up. :) > > > > On Thu, Jan 8, 2015 at 3:13 PM, Devon McCormick <devon...@gmail.com> > > wrote: > > > > > blit {: |:#:!/~i.64x > > > |value error: hext > > > |blit[0] > > > > > > On Thu, Jan 8, 2015 at 4:12 PM, Devon McCormick <devon...@gmail.com> > > > wrote: > > > > > > > You might try using "64x" instead of 64 as the argument. > > > > > > > > On Thu, Jan 8, 2015 at 4:02 PM, Michal Wallace < > > michal.wall...@gmail.com > > > > > > > > wrote: > > > > > > > >> I just stumbled onto this image, and I have to say it > > > >> is probably my favorite J image of all time. > > > >> > > > >> (replace blit with viewmat for a better picture) > > > >> > > > >> blit {: |:#:!/~i.64 > > > >> ▙ > > > >> ▙▙ > > > >> ▙ ▙ > > > >> ▙▙▙▙ > > > >> ▙ ▙ > > > >> ▙▙ ▙▙ > > > >> ▙ ▙ ▙ ▙ > > > >> ▙▙▙▙▙▙▙▙ > > > >> ▙ ▙ > > > >> ▙▙ ▙▙ > > > >> ▙ ▙ ▙ ▙ > > > >> ▙▙▙▙ ▙▙▙▙ > > > >> ▙ ▙ ▙ ▙ > > > >> ▙▙ ▙▙ ▙▙ ▙▙ > > > >> ▙ ▙ ▙ ▙ ▙ ▙ ▙ ▙ > > > >> ▙▙▙▙▙▙▙▙▙▙▙▙▙▙▙▙ > > > >> ▙ ▙ > > > >> ▙▙ ▙▙ > > > >> ▙ ▙ ▙ ▙ > > > >> ▙▙▙▙ ▙▙▙▙ > > > >> ▙ ▙ ▙ ▙ > > > >> ▙▙ ▙▙ ▙▙ ▙▙ > > > >> ▙ ▙ ▙ ▙ ▙ ▙ ▙ ▙ > > > >> ▙▙▙▙▙▙▙▙ ▙▙▙▙▙▙▙▙ > > > >> ▙ ▙ ▙ ▙ > > > >> ▙▙ ▙▙ ▙▙ ▙▙ > > > >> ▙ ▙ ▙ ▙ ▙ ▙ ▙ ▙ > > > >> ▙▙▙▙ ▙▙▙█▐▛▜▞▙▙▙▙ ▙▙▙▙ > > > >> ▙ ▙ ▙ ▗▀ ▝▘▖ ▙ ▙ ▙ > > > >> ▙▙ ▙▙ ▙▙▖ ▗▙▙ ▙▙ ▙▙ > > > >> ▙ ▙ ▙ ▙ ▌▘ ▘▚ ▙ ▙ ▙ ▙ > > > >> ▙▙▙▙▙▙▙▙▙▖ ▗▙▙▙▙▙▙▙▙▙ > > > >> > > > >> > > > >> What do you see? :) > > > >> > > > >> > > > >> PS. here's blit... it's just something i use to render graphics in > the > > > IRC > > > >> channel. > > > >> > > > >> NB. lol: removes every other item. (l=1 o=0) > > > >> NB. tile uses this to cut out overlapping tiles created by 2 2 <;.3 > > > >> lol =: (# $ 1 , 0:) # ] > > > >> NB. tile: converts a rank 2 array to an array of of 2x2 boxed tiles > > > >> tile =: [: (lol"1)@lol 2 2 <;.3 ] > > > >> NB. blit > > > >> blit =: (hext{~#.@,L:0)@:tile "2 > > > >> > ---------------------------------------------------------------------- > > > >> For information about J forums see > > http://www.jsoftware.com/forums.htm > > > > > > > > > > > > > > > > > > > > -- > > > > Devon McCormick, CFA > > > > > > > > > > > > > > > > > -- > > > Devon McCormick, CFA > > > ---------------------------------------------------------------------- > > > 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 > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
