Re: [Bug-apl] Formatting of large arrays

[Juergen Sauermann]

Hi, actually ⎕PW is considered after ⎕CR. ⎕CR of a single line creates a 3 line APL matrix:             ⎕PW←30       ⎕PW←30             29⎕CR ⍳15 ┏→━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━┓ ┃1 2 3 4 5 6 7 8 9 10 11 12 13        14 15┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━┛       ⍴ 29⎕CR ⍳15 3 37 Since 37 > ⎕PW the standard APL output breaks every line of the matrix at a suitable place before ⎕PW (so that, for example, numbers are not cut in the middle). If I understand you correcly then you would like to it to look like this (just change the font setting in your email client to make it look nicer): ┏→━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ 1 2 3 4 5 6 7 8 9 10 11 12 ↲ ┃ ┃ ↳   13 14 15                 ┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ The problem with this is that it is not properly working recursively. If a sub-item is also a large matrix and wrapped at ⎕PW then it wont fit into the containing matrix. An boxed output is normally only used when you have problems with nested values, so the sub-items are almost always nested. /// Jürgen On 01/31/2017 04:00 PM, Elias Mårtenson wrote: Of course. I don't have any issues with the standard layout. The problem I'm having is with boxed layout. To take a simple example:       ⎕PW←30       29⎕CR ⍳15 ┏→━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━┓ ┃1 2 3 4 5 6 7 8 9 10 11 12 13        14 15┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━┛ Here, it seems as though ⎕PW is looked at before the ⎕CR formatting happens. I would much rather it look something like this, just as an example: ┏→━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ 1 2 3 4 5 6 7 8 9 10 11 12 ↲ ┃ ┃ ↳   13 14 15                 ┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ The formatting looks bad on my email client, but I'm hoping you get the idea. I basically want ⎕CR to know about the print width, and format the output in a way that is manageable. The reason for this is that I usually set ]BOXING when working in APL, and whenever I display arrays with more than, say, 30-40 elements I keep having to turn off ]BOXING just in order to be able to make sense of what I'm seeing. Regards, Elias On 31 January 2017 at 19:32, Juergen Sauermann <juergen.sauerm...@t-online.de> wrote: Hi Elias like how? One thing could be to set ⎕PW←1000 but that only avoids the indentation of subsequent lines. Another way is to X←⍕BIG_MATRIX and then use ↑ and ↓ to display pieces of X. Another simple trick is to ⍉ the dara before ⎕CRing it. The general problem is that the way APL2 prints its output has been around for very long, already since APL times, so changing it today will certainly confuse a number of people (including myself). /// Jürgen On 01/31/2017 05:35 AM, Elias Mårtenson wrote: When printing a one-dimensional array which is wider than ⎕PW, and using a ⎕CR mode which uses box-drawing characters such as 8 or 29, the output is quite unreadable. For example, with ⎕PW←89 (standard for my Emacs session) this is what I get when printing ⍳100:       29⎕CR ⍳100 ┏→━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 3       3 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60        61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88        89 90 91 92 93 94 95 96 97 98 99 100┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━       ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ There must be a way to primat this in a nicer way. Regards, Elias