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Re: [Bug-apl] Cell grid in ⎕CR output?

From: Juergen Sauermann
Subject: Re: [Bug-apl] Cell grid in ⎕CR output?
Date: Fri, 28 Mar 2014 17:39:14 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130330 Thunderbird/17.0.5

Hi Elias,

this is actually not so easy and I can imaging a number of inner/outer line styles that could become
too complex for a ⎕CR mode to be useful. How about using APL? Like:

A←'╔╗╚╝║═╦╩╠╣╬║═'   ⍝ all lines double
A←'╔╗╚╝║═╤╧╟╢┼│─'   ⍝ outside lines double, inside lines single
B←3 4⍴1 2 3 4 'a' 'b' 'cde' 'f' 9 10 11 12

 ⍝ add vertical lines, remember their X-coordinates in X
 B1←(⊃,/⊃¨{ A[12],⍕B[;,⍵] }¨⍳¯1↑⍴B),A[5] ◊ B1[;1]←A[5]
 C1←(⊃,/⊃¨{ ' ',⍕B[;,⍵]} ¨⍳¯1↑⍴B),' '
 X←B1[1;] ≠ C1[1;]
 ⍝ add horizontal lines, remember their Y-coordinates in Y
 (ZY ZX)←⍴Z←A[6]⍪(2 1×⍴B1)⍴B1,[1.5]A[13] ◊ Z[ZY;]←A[6]
 C2←' '⍪(2 1×⍴C1)⍴C1,[1.5]' ' ◊ Y←Z[;2] ≠ C2[;2]
 (Y⌿X/Z)←A[11]                       ⍝ crosses
 (X/Z[1;])←A[7] ◊ (X/Z[ZY;])←A[8]    ⍝ top/bottom lines
 (Y⌿Z[;1])←A[9] ◊ (Y⌿Z[;ZX])←A[10]   ⍝ left/right lines
 Z[1,ZY; 1,ZX]←2 2⍴A                 ⍝ corners

║1│ 2│   3 │ 4║
║a│ b│ cde │ f║
║9│10│  11 │12║

/// Jürgen

On 03/26/2014 02:35 PM, Elias Mårtenson wrote:
Would it be possible to add a ⎕CR mode where matrices are displayed in a grid?

In other words, instead of displaying 3 3⍴⍳9 like this:

↓1 2 3│
│4 5 6│
│7 8 9│

I'd like it to be displayed like this:


I was looking at the code, and it actually seems slightly harder to do than I expected since the frame around a matrix is drawn separately from the actual content, and the grid-style requires that the frame changes depending on the alignment of the actual cells inside the matrix.

However, I still would like to ask if there is a way to do it, as there are cases where the grid notation is much more clear.


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