Do you mean the over/by thing of
http://www.jsoftware.com/help/dictionary/intro03.htm ?
over =: ({. ; }.)@":@,
by =: ' '&;@,.@[ ,. ]
b by (c over d)
┌──┬─────────────────────────────┐
│ │ 4 3 2 1 0 _1 _2 _3 _4│
├──┼─────────────────────────────┤
│_4│_16 _12 _8 _4 0 4 8 12 16│
│_3│_12 _9 _6 _3 0 3 6 9 12│
│_2│ _8 _6 _4 _2 0 2 4 6 8│
│_1│ _4 _3 _2 _1 0 1 2 3 4│
│ 0│ 0 0 0 0 0 0 0 0 0│
│ 1│ 4 3 2 1 0 _1 _2 _3 _4│
│ 2│ 8 6 4 2 0 _2 _4 _6 _8│
│ 3│ 12 9 6 3 0 _3 _6 _9 _12│
│ 4│ 16 12 8 4 0 _4 _8 _12 _16│
└──┴─────────────────────────────┘
(not that I competely understand it, by the way).
Ben
________________________________________
From: [email protected]
[[email protected]] on behalf of Linda Alvord
[[email protected]]
Sent: Saturday, November 02, 2013 11:27
To: [email protected]
Subject: [Jprogramming] Times Table Therapy
Maybe these will be better boxes.
a=:' '
b=:i:4
c=:i:_4
d=:b*/c
b,d
_4 _3 _2 _1 0 1 2 3 4
_16 _12 _8 _4 0 4 8 12 16
_12 _9 _6 _3 0 3 6 9 12
_8 _6 _4 _2 0 2 4 6 8
_4 _3 _2 _1 0 1 2 3 4
0 0 0 0 0 0 0 0 0
4 3 2 1 0 _1 _2 _3 _4
8 6 4 2 0 _2 _4 _6 _8
12 9 6 3 0 _3 _6 _9 _12
16 12 8 4 0 _4 _8 _12 _16
]e=:(<b),:<d
------------------------------┐
│_4 _3 _2 _1 0 1 2 3 4 │
+-----------------------------+
│_16 _12 _8 _4 0 4 8 12 16│
│_12 _9 _6 _3 0 3 6 9 12│
│ _8 _6 _4 _2 0 2 4 6 8│
│ _4 _3 _2 _1 0 1 2 3 4│
│ 0 0 0 0 0 0 0 0 0│
│ 4 3 2 1 0 _1 _2 _3 _4│
│ 8 6 4 2 0 _2 _4 _6 _8│
│ 12 9 6 3 0 _3 _6 _9 _12│
│ 16 12 8 4 0 _4 _8 _12 _16│
L------------------------------
]f=:(<a),:<,.c
---┐
│ │
+--+
│ 4│
│ 3│
│ 2│
│ 1│
│ 0│
│_1│
│_2│
│_3│
│_4│
L---
f,.e
---T-----------------------------┐
│ │_4 _3 _2 _1 0 1 2 3 4 │
+--+-----------------------------+
│ 4│_16 _12 _8 _4 0 4 8 12 16│
│ 3│_12 _9 _6 _3 0 3 6 9 12│
│ 2│ _8 _6 _4 _2 0 2 4 6 8│
│ 1│ _4 _3 _2 _1 0 1 2 3 4│
│ 0│ 0 0 0 0 0 0 0 0 0│
│_1│ 4 3 2 1 0 _1 _2 _3 _4│
│_2│ 8 6 4 2 0 _2 _4 _6 _8│
│_3│ 12 9 6 3 0 _3 _6 _9 _12│
│_4│ 16 12 8 4 0 _4 _8 _12 _16│
L--+------------------------------
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