How about 4 boxes instead of 2 for this? Note the two labels or “axes”,
correspond to the conventional numbering of the x-axis and y-axis in Cartesian
graphs.
a=:'*'
b=:i:4
c=:i:_4
d=:b*/c
(' *',":,.c);b,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│
└──┴─────────────────────────────┘
Linda
-----Originaforl Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of km
Sent: Saturday, November 02, 2013 10:43 AM
To: [email protected]
Subject: Re: [Jprogramming] Times Table Therapy
Perhaps you can find a way to use Format ":
--Kip Murray
Sent from my iPad
> On Nov 2, 2013, at 9:17 AM, "Linda Alvord" <[email protected]> wrote:
>
> I better do it myself. (I may call for help...) Thanks for the offer.
> Linda
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Raul
> Miller
> Sent: Saturday, Novembere 02, 2013 8:07 AM
> To: Programming forum
> Subject: Re: [Jprogramming] Times Table Therapy
>
> Do you want an explanation? Or would it be more fun to work it out by
> yourself?
>
> Thanks,
>
> --
> Raul
>
>
>
> On Sat, Nov 2, 2013 at 7:37 AM, Ben Gorte - CITG
> <[email protected]>wrote:
>
>> 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--+------------------------------
>>
>>
>>
>> ---------------------------------------------------------------------
>> - For information about J forums see
>> http://www.jsoftware.com/forums.htm
>> ---------------------------------------------------------------------
>> - For information about J forums see
>> http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
> ----------------------------------------------------------------------
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