Yes, impressive. But as usual the part that I could not follow just told me 
that even if the author can do it easily, I can't. I have been a newbee on J 
for some years, but a lot of it I still don't master. I still use J602 because 
I didn't manage to make the later versions run. 


I love short programs like these
   M=.+/%# NB. Mean value
   R=.M&.:*: NB. Root mean square
   D=.-M NB. Deviation from mean
   S=.R@D NB. Standard deviation
   A=.M,.S NB. Arithmetic mean and standard deviation
   G=.A&.:^. NB. Geometric mean and standard deviation
   A 98 2
50 48
   G 98 2
14 7
   50(+,-)48
98 2
   14(*,%)7
98 2

    (-,+)/A 11+i.10 NB. Summary. mu minus or plus sigma
12.6277 18.3723


Thanks. Bo.




Den 19:17 fredag den 7. marts 2014 skrev Roger Hui <rogerhui.can...@gmail.com>:
 
V. nice.
>
>I note that the video basically does not make use of sound in the sense the
>if you mute it, the information content is the same.  The video
>https://www.youtube.com/watch?v=DmT80OseAGs (Sudoku in APL, by John
>Scholes) has a different approach wrt sound.  From what I understand the
>narration is difficult to do well and required lots of practice.
>
>
>
>
>
>
>On Fri, Mar 7, 2014 at 5:11 AM, Martin Saurer <martin.sau...@bluewin.ch>wrote:
>
>> Hello all Jers,
>>
>>
>>
>> My two cents (or 15 minutes) to show what J can do.
>>
>>
>>
>> Feedback is welcome.
>>
>>
>>
>>  <https://www.youtube.com/watch?v=VSJpJt3c11c>
>> https://www.youtube.com/watch?v=VSJpJt3c11c
>>
>>
>>
>>
>>
>> ----------------------------------------------------------------------
>> 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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