there is ,./ 2 8 $ i. 4 4
On Friday, July 1, 2022, 09:33:48 p.m. EDT, Thomas McGuire <tmcguir...@gmail.com> wrote: I was playing with the Window driver and trying to paint the toucan.bmp to the window I created. Expanding on that I wanted to pain a panel of toucan.bmp bitmaps to the background. Now I was able to glom together the bitmaps into a 2 x 2 panel of bitmaps, but it seems I should be able to just specify how many rows and columns of matrices I want and let J handle the complexity. I can assign demensions easily and get the structure of what I want through boxing. For this I will use a simple square matrix: i. 4 4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 If I box this I can dial up any table of boxes using shape: <i. 4 4 ┌───────────┐ │ 0 1 2 3│ │ 4 5 6 7│ │ 8 9 10 11│ │12 13 14 15│ └───────────┘ Then using shape you get: 2 2$<i.4 4 ┌───────────┬───────────┐ │ 0 1 2 3│ 0 1 2 3│ │ 4 5 6 7│ 4 5 6 7│ │ 8 9 10 11│ 8 9 10 11│ │12 13 14 15│12 13 14 15│ ├───────────┼───────────┤ │ 0 1 2 3│ 0 1 2 3│ │ 4 5 6 7│ 4 5 6 7│ │ 8 9 10 11│ 8 9 10 11│ │12 13 14 15│12 13 14 15│ └───────────┴───────────┘ I want those to squish together to form an 8x8 square matrix as it appears right now. I came up with the following: I raze the structure (with ‘;’) and then insert a splice (‘,.’) using the ‘/‘ adverb: ,./;"1(2 2$<i. 4 4) 0 1 2 3 0 1 2 3 4 5 6 7 4 5 6 7 8 9 10 11 8 9 10 11 12 13 14 15 12 13 14 15 0 1 2 3 0 1 2 3 4 5 6 7 4 5 6 7 8 9 10 11 8 9 10 11 12 13 14 15 12 13 14 15 This works with the only caveat that if you specify a rectangular matrix as the final form the final dimensions are the transpose of what you would expect (minor detail). I am wondering is there a way to duplicate a seed matrix and give it the form I want without resorting to boxing. My previous attempts at this failed. Also is there a way to unbox and have this retain its current structure? I failed at trying different ranks with raze (‘;’) and unbox (‘>’) and getting anything close to what I have now. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
