lang.j.programming (date)

August 31, 2006

RE: [Jprogramming] Incomplete specification of monad ~:

Date: August 31, 2006
From: Oleg Kobchenko <olegykj@xxxxxxxxx>

In-reply-to: <015e01c6cd4a$bfb6f3b0$6501a8c0@DD342W61 >
References: <015e01c6cd4a$bfb6f3b0$6501a8c0@DD342W61 >

Also

   (-. -.@~: # ]) 'eleemosynary'
lmosnar

   #;:'-. -.@~: # ]'
6

   #;:'] #~ i.~ = i:~'
8

--- Henry Rich <HenryHRich@xxxxxxxxx> wrote:

> No, I didn't.  That's a good one.  Works without the ] too.

Yes.

> Henry Rich
> 
> > -----Original Message-----
> > From: programming-bounces@xxxxxxxxxxxxx 
> > [mailto:programming-bounces@xxxxxxxxxxxxx] On Behalf Of Roger Hui
> > Sent: Thursday, August 31, 2006 6:10 PM
> > To: Programming forum
> > Subject: Re: [Jprogramming] Incomplete specification of monad ~:
> > 
> > Did you know:
> > 
> >    (] #~ i.~ = i:~) 'eleemosynary'
> > lmosnar
> > 
> > That is, the items of the argument that are unique.
> > 
> > >From the i: page of the dictionary
> > http://www.jsoftware.com/books/help/dictionary/dico.htm
> > 
> > 
> > 
> > ----- Original Message -----
> > From: Roger Hui <rhui000@xxxxxxx>
> > Date: Thursday, August 31, 2006 11:42 am
> > Subject: Re: [Jprogramming] Incomplete specification of monad ~:
> > 
> > > If I say anything more, I would be more inclined
> > > to say
> > >   b is (i.@# = i.~) y
> > > than 
> > >   #.b is maximized
> > > 
> > > 
> > > 
> > > ----- Original Message -----
> > > From: Henry Rich <HenryHRich@xxxxxxxxx>
> > > Date: Thursday, August 31, 2006 9:14 am
> > > Subject: [Jprogramming] Incomplete specification of monad ~:
> > > 
> > > > ~:y is the boolean list b such that b#y is the nub of y 
> > > > 
> > > > 
> > > > This is incomplete.  There may be many possible values
> > > > of b that qualify; ~: produces the one such that #. b
> > > > is maximized.


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Re: [Jprogramming] Symmetric inner and outer products

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

See also:
http://www.jsoftware.com/jwiki/Essays/Reflexive



----- Original Message -----
From: Kip Murray <km@xxxxxxxxxxx>
Date: Thursday, August 31, 2006 5:35 am
Subject: Re: [Jprogramming] Symmetric inner and outer products

...
> About matrices, Gilbert Strang comments in Linear Algebra and Its 
> Applications:
> 
> "Symmetric matrices appear in every subject whose laws are fair.  
> 'Each 
> action has an equal and opposite reaction.'  The entry a_ij that 
> gives 
> the action of i onto j is matched by a_ji."


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[Jprogramming] Error in (,:0 1) E. i. 4 4, I think

Date: August 31, 2006
From: "Henry Rich" <HenryHRich@xxxxxxxxx>

In-reply-to: <42b324442b22f3.42b22f342b3244@xxxxxxx>
References: <42b324442b22f3.42b22f342b3244@xxxxxxx>

It appears to me that E. on multidimensional arrays fails
when x has a different numeric type from y:

   (,: 0 1) E. i. 4 4   NB. Error, Boolean x, integer y
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
   (,: 0 1 2) E. i. 4 4  NB. OK, Integer x, integer y
1 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
   (,: <. 0.1 + 0 1) E. i. 4 4  NB. OK, Integer x, integer y
1 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0 


Looks like it's OK on lists.

Henry Rich

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RE: [Jprogramming] Incomplete specification of monad ~:

Date: August 31, 2006
From: "Henry Rich" <HenryHRich@xxxxxxxxx>

In-reply-to: <43c4ab243c3a91.43c3a9143c4ab2@xxxxxxx>
References: <43c4ab243c3a91.43c3a9143c4ab2@xxxxxxx>

No, I didn't.  That's a good one.  Works without the ] too.

Henry Rich

> -----Original Message-----
> From: programming-bounces@xxxxxxxxxxxxx 
> [mailto:programming-bounces@xxxxxxxxxxxxx] On Behalf Of Roger Hui
> Sent: Thursday, August 31, 2006 6:10 PM
> To: Programming forum
> Subject: Re: [Jprogramming] Incomplete specification of monad ~:
> 
> Did you know:
> 
>    (] #~ i.~ = i:~) 'eleemosynary'
> lmosnar
> 
> That is, the items of the argument that are unique.
> 
> >From the i: page of the dictionary
> http://www.jsoftware.com/books/help/dictionary/dico.htm
> 
> 
> 
> ----- Original Message -----
> From: Roger Hui <rhui000@xxxxxxx>
> Date: Thursday, August 31, 2006 11:42 am
> Subject: Re: [Jprogramming] Incomplete specification of monad ~:
> 
> > If I say anything more, I would be more inclined
> > to say
> >   b is (i.@# = i.~) y
> > than 
> >   #.b is maximized
> > 
> > 
> > 
> > ----- Original Message -----
> > From: Henry Rich <HenryHRich@xxxxxxxxx>
> > Date: Thursday, August 31, 2006 9:14 am
> > Subject: [Jprogramming] Incomplete specification of monad ~:
> > 
> > > ~:y is the boolean list b such that b#y is the nub of y 
> > > 
> > > 
> > > This is incomplete.  There may be many possible values
> > > of b that qualify; ~: produces the one such that #. b
> > > is maximized.
> 
> 
> ----------------------------------------------------------------------
> For information about J forums see 
> http://www.jsoftware.com/forums.htm

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Re: [Jprogramming] Incomplete specification of monad ~:

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

Did you know:

   (] #~ i.~ = i:~) 'eleemosynary'
lmosnar

That is, the items of the argument that are unique.

>From the i: page of the dictionary
http://www.jsoftware.com/books/help/dictionary/dico.htm



----- Original Message -----
From: Roger Hui <rhui000@xxxxxxx>
Date: Thursday, August 31, 2006 11:42 am
Subject: Re: [Jprogramming] Incomplete specification of monad ~:

> If I say anything more, I would be more inclined
> to say
>   b is (i.@# = i.~) y
> than 
>   #.b is maximized
> 
> 
> 
> ----- Original Message -----
> From: Henry Rich <HenryHRich@xxxxxxxxx>
> Date: Thursday, August 31, 2006 9:14 am
> Subject: [Jprogramming] Incomplete specification of monad ~:
> 
> > ~:y is the boolean list b such that b#y is the nub of y 
> > 
> > 
> > This is incomplete.  There may be many possible values
> > of b that qualify; ~: produces the one such that #. b
> > is maximized.


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RE: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>

Dan Bron wrote:
> Any other sneak attacks?

Against what?

A person might use system defined names, for example.  
And/or, a person might construct a gerund "manually".
In these sorts of cases you can wind up performing
socket actions without including !: in the code.

Of course, all such activities take some programming, and
for many problems these approaches are not worthwhile.

-- 
Raul

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RE: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: Dan Bron <jf@xxxxxxxxx>

In-reply-to: <B5AF5BC3CAAF6C44865B9BF0E0C569370505B3@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
References: <B5AF5BC3CAAF6C44865B9BF0E0C569370505B3@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

write
>J code which downloads and executes code 

You can't download code from elsewhere without  !:  .

>   ({~ }.&.":) '* -.2|!/~i.8'


Hey, never thought of using  ":^:_1  to subvert the rules.  Good one!  Ok, 
without  __invoking__ in any way,  ". !: or :  .  Just to be explicit,  ":^:_1  
(called by  &.":  ) invokes  ".  .  To wit:

           ": b. _1
        ".
Any other sneak attacks?

-Dan
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Re: [Jprogramming] Dealing a bridge hand

Date: August 31, 2006
From: Oleg Kobchenko <olegykj@xxxxxxxxx>

In-reply-to: <42de1fc42e40e1.42e40e142de1fc@xxxxxxx>
References: <42de1fc42e40e1.42e40e142de1fc@xxxxxxx>

It's good for manual entry by human, though rows 
are not very visible. For processing in code, 
such may be considered:

   P=: ' PNBRQKpnbrqk'
   cmax=: [^:(>&(a.&i.))"0
   charboard=: 1j1 #"1 (' .'{~2|+/~i.8) cmax~ ]
   $BEGIN=: (,|.@toupper) ' ',~' ',~'rnbqkbnr',:'p'
8 8   
   charboard BEGIN   NB. character display
r n b q k b n r 
p p p p p p p p 
  .   .   .   . 
.   .   .   .   
  .   .   .   . 
.   .   .   .   
P P P P P P P P 
R N B Q K B N R 


There is also a new J Wiki page for bitmap layout

  http://www.jsoftware.com/jwiki/Scripts/Chess_Generator



--- Roger Hui <rhui000@xxxxxxx> wrote:

> See my user page on the Wikipedia:
> http://en.wikipedia.org/wiki/User:Roger_Hui
> The syntax is explained in:
> http://commons.wikimedia.org/wiki/Standard_chess_diagram
> 
> The chess diagrams you see on my user page are 
> generated with the following code:
> 
> {{Chess diagram small|=|tleft|
> |  |  |  |  |  |  |ql|  |=
> |  |ql|  |  |  |  |  |  |=
> |  |  |  |  |  |ql|  |  |=
> |  |  |ql|  |  |  |  |  |=
> |ql|  |  |  |  |  |  |  |=
> |  |  |  |  |  |  |  |nl|=
> |  |  |  |nl|nl|  |  |nl|=
> |  |  |  |  |nl|  |  |  |=
> |
> }}
> 
> {{Chess diagram small|=||
> |  |  |  |  |  |  |nl|nl|=
> |  |  |  |ql|  |  |  |  |=
> |  |ql|  |  |  |  |  |  |=
> |  |  |  |  |  |  |nl|nl|=
> |  |  |  |  |  |  |  |nl|=
> |ql|  |  |  |  |  |  |  |=
> |  |  |ql|  |  |  |  |  |=
> |  |  |  |  |  |ql|  |  |=
> |
> }}
> 
> 
> 
> ----- Original Message -----
> From: BjÃ¶rn Helgason <gosinn@xxxxxxxxx>
> Date: Thursday, August 31, 2006 0:07 am
> Subject: Re: [Jprogramming] Dealing a bridge hand
> 
> ...
> And on a similar topic - do you know how to get the chess pieces 
> to display
> like you do with the cards?
> 
> 
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
> 


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Re: [Jprogramming] Dealing a bridge hand

Date: August 31, 2006
From: "Björn Helgason" <gosinn@xxxxxxxxx>

In-reply-to: <42de1fc42e40e1.42e40e142de1fc@xxxxxxx>
References: <42de1fc42e40e1.42e40e142de1fc@xxxxxxx>

This is very interesting

It would also benefit from Olegs methods of creating graphics directly from
J

2006/8/31, Roger Hui <rhui000@xxxxxxx>:


See my user page on the Wikipedia:
http://en.wikipedia.org/wiki/User:Roger_Hui
The syntax is explained in:
http://commons.wikimedia.org/wiki/Standard_chess_diagram

The chess diagrams you see on my user page are
generated with the following code:

{{Chess diagram small|=|tleft|
|  |  |  |  |  |  |ql|  |=
|  |ql|  |  |  |  |  |  |=
|  |  |  |  |  |ql|  |  |=
|  |  |ql|  |  |  |  |  |=
|ql|  |  |  |  |  |  |  |=
|  |  |  |  |  |  |  |nl|=
|  |  |  |nl|nl|  |  |nl|=
|  |  |  |  |nl|  |  |  |=
|
}}

{{Chess diagram small|=||
|  |  |  |  |  |  |nl|nl|=
|  |  |  |ql|  |  |  |  |=
|  |ql|  |  |  |  |  |  |=
|  |  |  |  |  |  |nl|nl|=
|  |  |  |  |  |  |  |nl|=
|ql|  |  |  |  |  |  |  |=
|  |  |ql|  |  |  |  |  |=
|  |  |  |  |  |ql|  |  |=
|
}}



----- Original Message -----
From: Björn Helgason <gosinn@xxxxxxxxx>
Date: Thursday, August 31, 2006 0:07 am
Subject: Re: [Jprogramming] Dealing a bridge hand

...
And on a similar topic - do you know how to get the chess pieces
to display
like you do with the cards?


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--
Björn Helgason, Verkfræðingur
Fugl&Fiskur ehf, Þerneyjarsund 23,
Skype: gosiminn, gsm: +3546985532
801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
Landslags og skrúðgarðagerð, gröfuþjónusta
http://groups.google.com/group/J-Programming


Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans

góður kennari getur stigið á tær án þess að glansinn fari af skónum
         /|_      .-----------------------------------.
        ,'  .\  /  | Með léttri lund verður        |
    ,--'    _,'   | Dagurinn í dag                     |
   /       /       | Enn betri en gærdagurinn  |
  (   -.  |        `-----------------------------------'
  |     ) |        (\_ _/)
 (`-.  '--.)       (='.'=)
  `. )----'        (")_(")

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Re: [Jprogramming] Dealing a bridge hand

Date: August 31, 2006
From: "Björn Helgason" <gosinn@xxxxxxxxx>

In-reply-to: <20060831085849.30453.qmail@xxxxxxxxxxxxxxxxxxxxxxx>
References: <4031fef0608310007p2ca0bb12pe7b1e1d2749832eb@xxxxxxxxxxxxxx> <20060831085849.30453.qmail@xxxxxxxxxxxxxxxxxxxxxxx>

I tried to use your f_save''

I first needed to create the folder cards

Also a point to note is that you may not close the f window before running
f_save

After that it worked great

This is super!!

2006/8/31, Oleg Kobchenko <olegykj@xxxxxxxxx>:


J Wiki does not allow BMP attachments.

So I extended the instructions how to download
the PNG attachment and convert it to BMP.

  http://www.jsoftware.com/jwiki/Scripts/Cards_Generator

It is also possible to use the f_save'' to save
the generated cards as bitmap in correct location.


--- Björn Helgason <gosinn@xxxxxxxxx> wrote:

> Where do I get cards28x40.png?
> Or better still cards28x40.bmp?
>
> And on a similar topic - do you know how to get the chess pieces to
display
> like you do with the cards?
>
> 2006/8/31, Oleg Kobchenko <olegykj@xxxxxxxxx>:
> >
> > You need to have the bmp file beforehand.
> > The easiest way is to download the cards28x40.png,
> > open it in your favorite image viewer/editor as
> > same as cards28x40.bmp.
> >
> > --- Björn Helgason <gosinn@xxxxxxxxx> wrote:
> >
> > > F=: readbmp jpath'~user/cards/cards28x40.bmp'
> > >
> > > is missing
> > >
> > > length error: script
> > > |   C=:,/}:"_1]0 3 2 1{(,:~40 28)    ];.3 F
> > > |[-5] c:\j601\temp\21.ijs
> > >    F
> > > file read error
> > >
> > >
> > >
> > > 2006/8/30, Oleg Kobchenko <olegykj@xxxxxxxxx>:
> > > >
> > > > There is an update to the card generator with
> > > > an example of dealing a table of bridge.
> > > >
> > > > http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> > > >
> > > >
> > > > --- Oleg Kobchenko <olegykj@xxxxxxxxx> wrote:
> > > >
> > > > > I have published a script that generates a deck
> > > > > of cards at a small size both for Pocket PC and i
> > > > > nteractive compositing for display with  `viewrgb` etc.
> > > > >
> > > > >   http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> > > > >
> > > > > It is not necessary to re-run the script, instead the
> > > > > resulting bitmap can be used with `readbmp`.
> > > > > The picutre layout allows partially covered stacking.
> > > > > I hope that with some auxiliary verbs it would be
> > > > > possible to pack such subsets in an image and
> > > > > display various arrangements.
> > > > >
> > > > >
> > > > > --- Roger Hui <rhui000@xxxxxxx> wrote:
> > > > >
> > > > > > Björn meant presenting the bridge hands using the
> > > > > > card images as in Solitarie.
> > > > > >
> > > > > >
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>
> > > > > > Date: Tuesday, August 29, 2006 4:29 pm
> > > > > > Subject: RE: [Jprogramming] Dealing a bridge hand
> > > > > >
> > > > > > > Björn Helgason wrote:
> > > > > > > > More interesting would be to see the hand using the cards
> > > > > > > > used by Solitaire or similar.
> > > > > > >
> > > > > > > For example?
> > > > > > >
> > > > > > > (There seem to be hundreds of differing sets of rules for
> > > > > > > Solitaire, and no standardized representation for the
> > > > > > > initial state of a Solitaire game.)
> > > > > >
> > > > > >
> > > > > >
> > ----------------------------------------------------------------------
> > > > > > For information about J forums see
> > http://www.jsoftware.com/forums.htm
> > > > > >
> > > > >
> > > > >
> > > > > __________________________________________________
> > > > > Do You Yahoo!?
> > > > > Tired of spam?  Yahoo! Mail has the best spam protection around
> > > > > http://mail.yahoo.com
> > > > >
> > ----------------------------------------------------------------------
> > > > > For information about J forums see
> > http://www.jsoftware.com/forums.htm
> > > > >
> > > >
> > > >
> > > > __________________________________________________
> > > > Do You Yahoo!?
> > > > Tired of spam?  Yahoo! Mail has the best spam protection around
> > > > http://mail.yahoo.com
> > > >
----------------------------------------------------------------------
> > > > For information about J forums see
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> > > >
> > >
> > >
> > >
> > > --
> > > Björn Helgason, Verkfræðingur
> > > Fugl&Fiskur ehf, Þerneyjarsund 23,
> > > Skype: gosiminn, gsm: +3546985532
> > > 801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
> > > Landslags og skrúðgarðagerð, gröfuþjónusta
> > > http://groups.google.com/group/J-Programming
> > >
> > >
> > > Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari
> > einfaldleikans
> > >
> > > góður kennari getur stigið á tær án þess að glansinn fari af skónum
> > >           /|_      .-----------------------------------.
> > >          ,'  .\  /  | Með léttri lund verður        |
> > >      ,--'    _,'   | Dagurinn í dag                     |
> > >     /       /       | Enn betri en gærdagurinn  |
> > >    (   -.  |        `-----------------------------------'
> > >    |     ) |        (\_ _/)
> > >   (`-.  '--.)       (='.'=)
> > >    `. )----'        (")_(")
> > > >
----------------------------------------------------------------------
> > > For information about J forums see
http://www.jsoftware.com/forums.htm
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam protection around
> > http://mail.yahoo.com
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> >
>
>
>
> --
> Björn Helgason, Verkfræðingur
> Fugl&Fiskur ehf, Þerneyjarsund 23,
> Skype: gosiminn, gsm: +3546985532
> 801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
> Landslags og skrúðgarðagerð, gröfuþjónusta
> http://groups.google.com/group/J-Programming
>
>
> Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari
einfaldleikans
>
> góður kennari getur stigið á tær án þess að glansinn fari af skónum
>           /|_      .-----------------------------------.
>          ,'  .\  /  | Með léttri lund verður        |
>      ,--'    _,'   | Dagurinn í dag                     |
>     /       /       | Enn betri en gærdagurinn  |
>    (   -.  |        `-----------------------------------'
>    |     ) |        (\_ _/)
>   (`-.  '--.)       (='.'=)
>    `. )----'        (")_(")
> > ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm


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--
Björn Helgason, Verkfræðingur
Fugl&Fiskur ehf, Þerneyjarsund 23,
Skype: gosiminn, gsm: +3546985532
801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
Landslags og skrúðgarðagerð, gröfuþjónusta
http://groups.google.com/group/J-Programming


Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans

góður kennari getur stigið á tær án þess að glansinn fari af skónum
         /|_      .-----------------------------------.
        ,'  .\  /  | Með léttri lund verður        |
    ,--'    _,'   | Dagurinn í dag                     |
   /       /       | Enn betri en gærdagurinn  |
  (   -.  |        `-----------------------------------'
  |     ) |        (\_ _/)
 (`-.  '--.)       (='.'=)
  `. )----'        (")_(")

----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm

Re: [Jprogramming] Incomplete specification of monad ~:

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

If I say anything more, I would be more inclined
to say
   b is (i.@# = i.~) y
than 
   #.b is maximized



----- Original Message -----
From: Henry Rich <HenryHRich@xxxxxxxxx>
Date: Thursday, August 31, 2006 9:14 am
Subject: [Jprogramming] Incomplete specification of monad ~:

> ~:y is the boolean list b such that b#y is the nub of y 
> 
> 
> This is incomplete.  There may be many possible values
> of b that qualify; ~: produces the one such that #. b
> is maximized.


----------------------------------------------------------------------
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RE: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>

Dan Bron wrote:
> 'Sides, I'd be more impressed with someone who could make an
> arbitrary J sentence execute using a constant number of tokens...

Trivial to do with constant number of characters: write
J code which downloads and executes code from some other
location.  Include a half dozen characters in the
url to select the particular bit of code to run and
you've the potential of far more applications than anyone
would want to see in forum posts.

> ... (without resorting to ". : or !:) ...

Excluding useful primitives makes things harder, but not
impossible.  Consider, as an example of what can be done
without the presence of those three primitives:

   ({~ }.&.":) '* -.2|!/~i.8'

-- 
Raul

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Re: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: Dan Bron <jf@xxxxxxxxx>

In-reply-to: <432e463432d383.432d383432e463@xxxxxxx>
References: <432e463432d383.432d383432e463@xxxxxxx>

Roger wrote:
> Or just post "interesting" solutions to problems.

The point is, in a contest, one wants to have an unambigous winner.  When a 
question is not explicitly a contest, individual taste will suffice, but a 
contest should declare a winner, and it needs a metric to determine one.

If the metric is subverted, the next contest will tighten the rules.  Which, in 
this case, will have a useful outcome:  a comprehensive list of everything that 
can make a J script non-deterministic.   It's a goal unto itself.

'Sides, I'd be more impressed with someone who could make an arbitrary J 
sentence execute using a constant number of tokens (without resorting to ". : 
or !:) than a person who could generate a Sierpinski triangle in 5 characters 
less.

-Dan
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Re: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

As I said yesterday:

Or just post "interesting" solutions to problems.
Forum readers can decide for themselves which are 
the interesting attributes.

- number of characters
- number of tokens
- time
- space
- innovative use of the language
- elegance
- etc.

That is, the "rules" as they have been all along.



----- Original Message -----
From: greg heil <gheil.j@xxxxxxxxx>
Date: Thursday, August 31, 2006 9:29 am
Subject: Re: [Jprogramming] Re: Sierpinski triangle

> On 8/31/06, Roger Hui <rhui000@xxxxxxx> wrote:
> > However, comb takes time and space linear in the size of the 
> result whereas comb1 takes exponential.  Yet comb1 would have been 
> preferred according to the "number of characters" criterion.
> 
> Switching to a words criteria would not affect that. Any one
> dimensional valuation will have the same kind of deficits. ... unless
> there is a robust "market" of intelligent "bidders" which backs a
> "price" valuation. Even so some "bidders" will have variations in
> "preferences". And most "markets" have "externalities" which are not
> fully "costed".
> 
> A measure based on actual storage costs and easily evaluated has some
> constancy which supports a broad valuation of solution classes. In a
> sense the character metric is one of the broadest and most convenient.
> Metrics based on performance are either inexact (eg big O) or have
> constricting architectural assumptions (counting assembly language
> ops), and can be hard to evaluate. Characters are simple and broadly
> understood.


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Re: RE: [Jprogramming] Grade Up/Down with tables

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

The dictionary description on /: is a specification
and not a prescription on how to implement it.
The fact that

   /: (i.1e6),"1 0 ]33 11 44 22
1 3 0 2

gives the correct answer is a pretty good 
indication that the base value is not used in the
implementation.



----- Original Message -----
From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>
Date: Thursday, August 31, 2006 8:40 am
Subject: RE: [Jprogramming] Grade Up/Down with tables

> June Kim wrote:
> > What does "base" mean here?
> 
>   #.
> 
> > For example,
> >     /:~ 3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
> > 3 1 1 8 3
> > 3 1 4 1 6
> > 6 1 8 0 3
> >
> > What is the base value of the rows in this case(and why twice the
> > magnitude of any of the elements)?
> 
>   x=.3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
>   >:+:>./,|x
> 17
>   /: x
> 1 0 2
>   /:17#.x
> 1 0 2
> 
> Twice, to allow for negative numbers.
> 
> That said, the sorting algorithm probably does not use 17 in
> this case.  It probably "uses" 2^32.
> 
> More generally, I expect that internally the base value 
> primitive is not being used -- this would be slow, and
> would cause precision problems, with floating point arrays.


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Re: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: "greg heil" <gheil.j@xxxxxxxxx>

In-reply-to: <431110a4311ad3.4311ad3431110a@xxxxxxx>
References: <431110a4311ad3.4311ad3431110a@xxxxxxx>

On 8/31/06, Roger Hui <rhui000@xxxxxxx> wrote:

However, comb takes time and space linear in the size of the result whereas comb1 takes 
exponential.  Yet comb1 would have been preferred according to the "number of 
characters" criterion.


Switching to a words criteria would not affect that. Any one
dimensional valuation will have the same kind of deficits. ... unless
there is a robust "market" of intelligent "bidders" which backs a
"price" valuation. Even so some "bidders" will have variations in
"preferences". And most "markets" have "externalities" which are not
fully "costed".

A measure based on actual storage costs and easily evaluated has some
constancy which supports a broad valuation of solution classes. In a
sense the character metric is one of the broadest and most convenient.
Metrics based on performance are either inexact (eg big O) or have
constricting architectural assumptions (counting assembly language
ops), and can be hard to evaluate. Characters are simple and broadly
understood.

~greg
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Re: RE: [Jprogramming] Grade Up/Down with tables

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

The dictionary description is one way to avoid
having to describe what a major sort key is.



----- Original Message -----
From: Henry Rich <HenryHRich@xxxxxxxxx>
Date: Thursday, August 31, 2006 8:39 am
Subject: RE: [Jprogramming] Grade Up/Down with tables

> All this means is that the first item in each row is the
> major sort key, followed by the second item, and so on. 
> 
> The base value is the single number you would get from applying
> # to the row.  In your example, you could use
> 
>   20 #. 3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
> 489626 488563 971203
> 
> as the values to be sorted.
> 
> The base needs to be more than twice the magnitude to make sure
> that  0 10  is less than 1 _10  for example.
> 
> Henry Rich
> 
> 
> > -----Original Message-----
> > From: programming-bounces@xxxxxxxxxxxxx 
> > [programming-bounces@xxxxxxxxxxxxx] On Behalf Of June Kim
> > Sent: Thursday, August 31, 2006 11:34 AM
> > To: Programming forum
> > Subject: [Jprogramming] Grade Up/Down with tables
> > 
> > >From J Dictionary:
> > 
> > <quote>
> > If y is a table, /:y grades the base value of the rows, using a base
> > larger than twice the magnitude of any of the elements.
> > </quote>
> > 
> > What does "base" mean here?
> > 
> > For example,
> > 
> >     /:~ 3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
> > 3 1 1 8 3
> > 3 1 4 1 6
> > 6 1 8 0 3
> > 
> > What is the base value of the rows in this case(and why twice the
> > magnitude of any of the elements)?


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[Jprogramming] Incomplete specification of monad ~:

Date: August 31, 2006
From: "Henry Rich" <HenryHRich@xxxxxxxxx>

In-reply-to: <42de1fc42e40e1.42e40e142de1fc@xxxxxxx>
References: <42de1fc42e40e1.42e40e142de1fc@xxxxxxx>

~:y is the boolean list b such that b#y is the nub of y 


This is incomplete.  There may be many possible values
of b that qualify; ~: produces the one such that #. b
is maximized.

Henry Rich

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Re: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

The following verbs find all size x combinations
of i.y, in lexicographic order:

comb=: 4 : 0
 k=. i.>:d=.y-x
 z=. (d$<i.0 0),<i.1 0
 for. i.x do. z=. k ,.&.> ,&.>/\. >:&.> z end.
 ; z
)

comb1=: ((= +/"1) |.@:I.@# ]) #:@i.@(2&^)

For example, 3 comb 5 .  However, comb takes time
and space linear in the size of the result whereas 
comb1 takes exponential.  Yet comb1 would have been
preferred according to the "number of characters" 
criterion.  

The same point can be made with other programming 
problems, such as:

compositions
permutations
self-upgrading permutations
self-downgrading permutations



----- Original Message -----
From: greg heil <gheil.j@xxxxxxxxx>
Date: Thursday, August 31, 2006 8:05 am
Subject: Re: [Jprogramming] Re: Sierpinski triangle

> Number of characters is best. It shows the compressibility of the
> language, as well as the solution. Eg Arthur notes, with some pride,
> that running his K code through a zip compressor yields no benefit.
> Hopefully such a goal is attainable in J.Perhaps someday inflected
> vocabulary can have single unicode alternatives... Then it will be
> like the old days with APL keyboards. With a character metric we can
> have cross language comparisons.


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RE: [Jprogramming] Grade Up/Down with tables

Date: August 31, 2006
From: "Henry Rich" <HenryHRich@xxxxxxxxx>

In-reply-to: <6f80c1520608310834y7d2f0025tceafa33ea924ce14@xxxxxxxxxxxxxx>
References: <6f80c1520608310834y7d2f0025tceafa33ea924ce14@xxxxxxxxxxxxxx>

All this means is that the first item in each row is the
major sort key, followed by the second item, and so on. 

The base value is the single number you would get from applying
# to the row.  In your example, you could use

   20 #. 3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
489626 488563 971203

as the values to be sorted.

The base needs to be more than twice the magnitude to make sure
that  0 10  is less than 1 _10  for example.

Henry Rich


> -----Original Message-----
> From: programming-bounces@xxxxxxxxxxxxx 
> [mailto:programming-bounces@xxxxxxxxxxxxx] On Behalf Of June Kim
> Sent: Thursday, August 31, 2006 11:34 AM
> To: Programming forum
> Subject: [Jprogramming] Grade Up/Down with tables
> 
> >From J Dictionary:
> 
> <quote>
> If y is a table, /:y grades the base value of the rows, using a base
> larger than twice the magnitude of any of the elements.
> </quote>
> 
> What does "base" mean here?
> 
> For example,
> 
>     /:~ 3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
> 3 1 1 8 3
> 3 1 4 1 6
> 6 1 8 0 3
> 
> What is the base value of the rows in this case(and why twice the
> magnitude of any of the elements)?
> ----------------------------------------------------------------------
> For information about J forums see 
> http://www.jsoftware.com/forums.htm

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RE: [Jprogramming] Grade Up/Down with tables

Date: August 31, 2006
From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>

June Kim wrote:
> What does "base" mean here?

   #.

> For example,
>     /:~ 3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
> 3 1 1 8 3
> 3 1 4 1 6
> 6 1 8 0 3
>
> What is the base value of the rows in this case(and why twice the
> magnitude of any of the elements)?

   x=.3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
   >:+:>./,|x
17
   /: x
1 0 2
   /:17#.x
1 0 2

Twice, to allow for negative numbers.

That said, the sorting algorithm probably does not use 17 in
this case.  It probably "uses" 2^32.

More generally, I expect that internally the base value 
primitive is not being used -- this would be slow, and
would cause precision problems, with floating point arrays.

-- 
Raul

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[Jprogramming] Grade Up/Down with tables

Date: August 31, 2006
From: "June Kim" <juneaftn@xxxxxxxxx>

From J Dictionary:


<quote>
If y is a table, /:y grades the base value of the rows, using a base
larger than twice the magnitude of any of the elements.
</quote>

What does "base" mean here?

For example,

   /:~ 3 1 4 1 6,3 1 1 8 3,:6 1 8 0 3
3 1 1 8 3
3 1 4 1 6
6 1 8 0 3

What is the base value of the rows in this case(and why twice the
magnitude of any of the elements)?
----------------------------------------------------------------------
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Re: [Jprogramming] Re: Sierpinski triangle

Date: August 31, 2006
From: "greg heil" <gheil.j@xxxxxxxxx>

In-reply-to: <26034899.1156972090323.JavaMail.root@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
References: <26034899.1156972090323.JavaMail.root@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

Number of characters is best. It shows the compressibility of the
language, as well as the solution. Eg Arthur notes, with some pride,
that running his K code through a zip compressor yields no benefit.
Hopefully such a goal is attainable in J.Perhaps someday inflected
vocabulary can have single unicode alternatives... Then it will be
like the old days with APL keyboards. With a character metric we can
have cross language comparisons.
----------------------------------------------------------------------
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Re: [Jprogramming] Dealing a bridge hand

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

See my user page on the Wikipedia:
http://en.wikipedia.org/wiki/User:Roger_Hui
The syntax is explained in:
http://commons.wikimedia.org/wiki/Standard_chess_diagram

The chess diagrams you see on my user page are 
generated with the following code:

{{Chess diagram small|=|tleft|
|  |  |  |  |  |  |ql|  |=
|  |ql|  |  |  |  |  |  |=
|  |  |  |  |  |ql|  |  |=
|  |  |ql|  |  |  |  |  |=
|ql|  |  |  |  |  |  |  |=
|  |  |  |  |  |  |  |nl|=
|  |  |  |nl|nl|  |  |nl|=
|  |  |  |  |nl|  |  |  |=
|
}}

{{Chess diagram small|=||
|  |  |  |  |  |  |nl|nl|=
|  |  |  |ql|  |  |  |  |=
|  |ql|  |  |  |  |  |  |=
|  |  |  |  |  |  |nl|nl|=
|  |  |  |  |  |  |  |nl|=
|ql|  |  |  |  |  |  |  |=
|  |  |ql|  |  |  |  |  |=
|  |  |  |  |  |ql|  |  |=
|
}}



----- Original Message -----
From: BjÃ¶rn Helgason <gosinn@xxxxxxxxx>
Date: Thursday, August 31, 2006 0:07 am
Subject: Re: [Jprogramming] Dealing a bridge hand

...
And on a similar topic - do you know how to get the chess pieces 
to display
like you do with the cards?


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Re: [Jprogramming] Symmetric inner and outer products

Date: August 31, 2006
From: Kip Murray <km@xxxxxxxxxxx>

In-reply-to: <002201c6ccae$f3e1dfc0$4001a8c0@vaio >
References: <20060831000512.20593.qmail@xxxxxxxxxxxxxxxxxxxxxxx> <002201c6ccae$f3e1dfc0$4001a8c0@vaio >

Remembering an earlier discussion of symmetric arrays (not just 
matrices), we could ask for efficient ways of dealing with 
them/representing them.  What can be done with existing facilities?

About matrices, Gilbert Strang comments in Linear Algebra and Its 
Applications:

"Symmetric matrices appear in every subject whose laws are fair.  'Each 
action has an equal and opposite reaction.'  The entry a_ij that gives 
the action of i onto j is matched by a_ji."


On Thu, 31 Aug 2006, Fraser Jackson wrote:

| There are many problems where for a matrix a  either the following
| 
| a fn"1 1 / a
| 
| or
| 
| 
| a  f . g  |: a
| 
| generate a symmetric matrix.
| 
| 
| I could well do with the saving of half the time on a computation.
| 
| 1.    Has anyone good suggestions for handling this?
| 2.    Isn't this such a common problem that some way of telling the
| interpreter to only do one triangle should be constructed?
| 
| Fraser


Kip Murray
Math, UofHouston

cmurray@xxxxxx
http://www.math.uh.edu/~km
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Re: [Jprogramming] Dealing a bridge hand

Date: August 31, 2006
From: Oleg Kobchenko <olegykj@xxxxxxxxx>

In-reply-to: <4031fef0608310007p2ca0bb12pe7b1e1d2749832eb@xxxxxxxxxxxxxx>
References: <4031fef0608310007p2ca0bb12pe7b1e1d2749832eb@xxxxxxxxxxxxxx>

J Wiki does not allow BMP attachments.

So I extended the instructions how to download
the PNG attachment and convert it to BMP.

  http://www.jsoftware.com/jwiki/Scripts/Cards_Generator

It is also possible to use the f_save'' to save
the generated cards as bitmap in correct location.


--- Björn Helgason <gosinn@xxxxxxxxx> wrote:

> Where do I get cards28x40.png?
> Or better still cards28x40.bmp?
> 
> And on a similar topic - do you know how to get the chess pieces to display
> like you do with the cards?
> 
> 2006/8/31, Oleg Kobchenko <olegykj@xxxxxxxxx>:
> >
> > You need to have the bmp file beforehand.
> > The easiest way is to download the cards28x40.png,
> > open it in your favorite image viewer/editor as
> > same as cards28x40.bmp.
> >
> > --- Björn Helgason <gosinn@xxxxxxxxx> wrote:
> >
> > > F=: readbmp jpath'~user/cards/cards28x40.bmp'
> > >
> > > is missing
> > >
> > > length error: script
> > > |   C=:,/}:"_1]0 3 2 1{(,:~40 28)    ];.3 F
> > > |[-5] c:\j601\temp\21.ijs
> > >    F
> > > file read error
> > >
> > >
> > >
> > > 2006/8/30, Oleg Kobchenko <olegykj@xxxxxxxxx>:
> > > >
> > > > There is an update to the card generator with
> > > > an example of dealing a table of bridge.
> > > >
> > > > http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> > > >
> > > >
> > > > --- Oleg Kobchenko <olegykj@xxxxxxxxx> wrote:
> > > >
> > > > > I have published a script that generates a deck
> > > > > of cards at a small size both for Pocket PC and i
> > > > > nteractive compositing for display with  `viewrgb` etc.
> > > > >
> > > > >   http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> > > > >
> > > > > It is not necessary to re-run the script, instead the
> > > > > resulting bitmap can be used with `readbmp`.
> > > > > The picutre layout allows partially covered stacking.
> > > > > I hope that with some auxiliary verbs it would be
> > > > > possible to pack such subsets in an image and
> > > > > display various arrangements.
> > > > >
> > > > >
> > > > > --- Roger Hui <rhui000@xxxxxxx> wrote:
> > > > >
> > > > > > Björn meant presenting the bridge hands using the
> > > > > > card images as in Solitarie.
> > > > > >
> > > > > >
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>
> > > > > > Date: Tuesday, August 29, 2006 4:29 pm
> > > > > > Subject: RE: [Jprogramming] Dealing a bridge hand
> > > > > >
> > > > > > > Björn Helgason wrote:
> > > > > > > > More interesting would be to see the hand using the cards
> > > > > > > > used by Solitaire or similar.
> > > > > > >
> > > > > > > For example?
> > > > > > >
> > > > > > > (There seem to be hundreds of differing sets of rules for
> > > > > > > Solitaire, and no standardized representation for the
> > > > > > > initial state of a Solitaire game.)
> > > > > >
> > > > > >
> > > > > >
> > ----------------------------------------------------------------------
> > > > > > For information about J forums see
> > http://www.jsoftware.com/forums.htm
> > > > > >
> > > > >
> > > > >
> > > > > __________________________________________________
> > > > > Do You Yahoo!?
> > > > > Tired of spam?  Yahoo! Mail has the best spam protection around
> > > > > http://mail.yahoo.com
> > > > >
> > ----------------------------------------------------------------------
> > > > > For information about J forums see
> > http://www.jsoftware.com/forums.htm
> > > > >
> > > >
> > > >
> > > > __________________________________________________
> > > > Do You Yahoo!?
> > > > Tired of spam?  Yahoo! Mail has the best spam protection around
> > > > http://mail.yahoo.com
> > > > ----------------------------------------------------------------------
> > > > For information about J forums see http://www.jsoftware.com/forums.htm
> > > >
> > >
> > >
> > >
> > > --
> > > Björn Helgason, Verkfræðingur
> > > Fugl&Fiskur ehf, Þerneyjarsund 23,
> > > Skype: gosiminn, gsm: +3546985532
> > > 801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
> > > Landslags og skrúðgarðagerð, gröfuþjónusta
> > > http://groups.google.com/group/J-Programming
> > >
> > >
> > > Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari
> > einfaldleikans
> > >
> > > góður kennari getur stigið á tær án þess að glansinn fari af skónum
> > >           /|_      .-----------------------------------.
> > >          ,'  .\  /  | Með léttri lund verður        |
> > >      ,--'    _,'   | Dagurinn í dag                     |
> > >     /       /       | Enn betri en gærdagurinn  |
> > >    (   -.  |        `-----------------------------------'
> > >    |     ) |        (\_ _/)
> > >   (`-.  '--.)       (='.'=)
> > >    `. )----'        (")_(")
> > > > ----------------------------------------------------------------------
> > > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam protection around
> > http://mail.yahoo.com
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> 
> 
> 
> -- 
> Björn Helgason, Verkfræðingur
> Fugl&Fiskur ehf, Þerneyjarsund 23,
> Skype: gosiminn, gsm: +3546985532
> 801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
> Landslags og skrúðgarðagerð, gröfuþjónusta
> http://groups.google.com/group/J-Programming
> 
> 
> Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans
> 
> góður kennari getur stigið á tær án þess að glansinn fari af skónum
>           /|_      .-----------------------------------.
>          ,'  .\  /  | Með léttri lund verður        |
>      ,--'    _,'   | Dagurinn í dag                     |
>     /       /       | Enn betri en gærdagurinn  |
>    (   -.  |        `-----------------------------------'
>    |     ) |        (\_ _/)
>   (`-.  '--.)       (='.'=)
>    `. )----'        (")_(")
> > ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
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Re: [Jprogramming] Dealing a bridge hand

Date: August 31, 2006
From: "Björn Helgason" <gosinn@xxxxxxxxx>

In-reply-to: <20060831000512.20593.qmail@xxxxxxxxxxxxxxxxxxxxxxx>
References: <4031fef0608301651u184b120ch26b1a04fb34953d@xxxxxxxxxxxxxx> <20060831000512.20593.qmail@xxxxxxxxxxxxxxxxxxxxxxx>

Where do I get cards28x40.png?
Or better still cards28x40.bmp?

And on a similar topic - do you know how to get the chess pieces to display
like you do with the cards?

2006/8/31, Oleg Kobchenko <olegykj@xxxxxxxxx>:


You need to have the bmp file beforehand.
The easiest way is to download the cards28x40.png,
open it in your favorite image viewer/editor as
same as cards28x40.bmp.

--- Björn Helgason <gosinn@xxxxxxxxx> wrote:

> F=: readbmp jpath'~user/cards/cards28x40.bmp'
>
> is missing
>
> length error: script
> |   C=:,/}:"_1]0 3 2 1{(,:~40 28)    ];.3 F
> |[-5] c:\j601\temp\21.ijs
>    F
> file read error
>
>
>
> 2006/8/30, Oleg Kobchenko <olegykj@xxxxxxxxx>:
> >
> > There is an update to the card generator with
> > an example of dealing a table of bridge.
> >
> > http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> >
> >
> > --- Oleg Kobchenko <olegykj@xxxxxxxxx> wrote:
> >
> > > I have published a script that generates a deck
> > > of cards at a small size both for Pocket PC and i
> > > nteractive compositing for display with  `viewrgb` etc.
> > >
> > >   http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> > >
> > > It is not necessary to re-run the script, instead the
> > > resulting bitmap can be used with `readbmp`.
> > > The picutre layout allows partially covered stacking.
> > > I hope that with some auxiliary verbs it would be
> > > possible to pack such subsets in an image and
> > > display various arrangements.
> > >
> > >
> > > --- Roger Hui <rhui000@xxxxxxx> wrote:
> > >
> > > > Björn meant presenting the bridge hands using the
> > > > card images as in Solitarie.
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>
> > > > Date: Tuesday, August 29, 2006 4:29 pm
> > > > Subject: RE: [Jprogramming] Dealing a bridge hand
> > > >
> > > > > Björn Helgason wrote:
> > > > > > More interesting would be to see the hand using the cards
> > > > > > used by Solitaire or similar.
> > > > >
> > > > > For example?
> > > > >
> > > > > (There seem to be hundreds of differing sets of rules for
> > > > > Solitaire, and no standardized representation for the
> > > > > initial state of a Solitaire game.)
> > > >
> > > >
> > > >
----------------------------------------------------------------------
> > > > For information about J forums see
http://www.jsoftware.com/forums.htm
> > > >
> > >
> > >
> > > __________________________________________________
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> > > http://mail.yahoo.com
> > >
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> > >
> >
> >
> > __________________________________________________
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> > Tired of spam?  Yahoo! Mail has the best spam protection around
> > http://mail.yahoo.com
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> >
>
>
>
> --
> Björn Helgason, Verkfræðingur
> Fugl&Fiskur ehf, Þerneyjarsund 23,
> Skype: gosiminn, gsm: +3546985532
> 801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
> Landslags og skrúðgarðagerð, gröfuþjónusta
> http://groups.google.com/group/J-Programming
>
>
> Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari
einfaldleikans
>
> góður kennari getur stigið á tær án þess að glansinn fari af skónum
>           /|_      .-----------------------------------.
>          ,'  .\  /  | Með léttri lund verður        |
>      ,--'    _,'   | Dagurinn í dag                     |
>     /       /       | Enn betri en gærdagurinn  |
>    (   -.  |        `-----------------------------------'
>    |     ) |        (\_ _/)
>   (`-.  '--.)       (='.'=)
>    `. )----'        (")_(")
> > ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm


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--
Björn Helgason, Verkfræðingur
Fugl&Fiskur ehf, Þerneyjarsund 23,
Skype: gosiminn, gsm: +3546985532
801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
Landslags og skrúðgarðagerð, gröfuþjónusta
http://groups.google.com/group/J-Programming


Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans

góður kennari getur stigið á tær án þess að glansinn fari af skónum
         /|_      .-----------------------------------.
        ,'  .\  /  | Með léttri lund verður        |
    ,--'    _,'   | Dagurinn í dag                     |
   /       /       | Enn betri en gærdagurinn  |
  (   -.  |        `-----------------------------------'
  |     ) |        (\_ _/)
 (`-.  '--.)       (='.'=)
  `. )----'        (")_(")

----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm

Re: [Jprogramming] Symmetric inner and outer products

Date: August 31, 2006
From: Roger Hui <rhui000@xxxxxxx>

- A factor of 2 isn't very exciting.  Scan the
factors quoted in the release notes:
http://www.jsoftware.com/books/help/release/contents.htm

- Special code is more likely for an expression 
which is tacit and is the simplest possible.  
For example:  fn"1/~  and  (f . g |:) 



----- Original Message -----
From: Fraser Jackson <fraser.jackson@xxxxxxxxxx>
Date: Wednesday, August 30, 2006 8:38 pm
Subject: [Jprogramming] Symmetric inner and outer products

> There are many problems where for a matrix a  either the following
> 
> a fn"1 1 / a
> 
> or
> 
> 
> a  f . g  |: a
> 
> generate a symmetric matrix.
> 
> 
> I could well do with the saving of half the time on a computation.
> 
> 1.    Has anyone good suggestions for handling this?
> 2.    Isn't this such a common problem that some way of telling 
> the 
> interpreter to only do one triangle should be constructed?


----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm

[Jprogramming] Symmetric inner and outer products

Date: August 31, 2006
From: "Fraser Jackson" <fraser.jackson@xxxxxxxxxx>

References: <20060831000512.20593.qmail@xxxxxxxxxxxxxxxxxxxxxxx>

There are many problems where for a matrix a  either the following

a fn"1 1 / a

or


a  f . g  |: a

generate a symmetric matrix.


I could well do with the saving of half the time on a computation.

1.    Has anyone good suggestions for handling this?

2. Isn't this such a common problem that some way of telling the

interpreter to only do one triangle should be constructed?


Fraser



----------------------------------------------------------------------
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Re: [Jprogramming] Dealing a bridge hand

Date: August 31, 2006
From: Oleg Kobchenko <olegykj@xxxxxxxxx>

In-reply-to: <4031fef0608301651u184b120ch26b1a04fb34953d@xxxxxxxxxxxxxx>
References: <4031fef0608301651u184b120ch26b1a04fb34953d@xxxxxxxxxxxxxx>

You need to have the bmp file beforehand.
The easiest way is to download the cards28x40.png,
open it in your favorite image viewer/editor as
same as cards28x40.bmp.

--- Björn Helgason <gosinn@xxxxxxxxx> wrote:

> F=: readbmp jpath'~user/cards/cards28x40.bmp'
> 
> is missing
> 
> length error: script
> |   C=:,/}:"_1]0 3 2 1{(,:~40 28)    ];.3 F
> |[-5] c:\j601\temp\21.ijs
>    F
> file read error
> 
> 
> 
> 2006/8/30, Oleg Kobchenko <olegykj@xxxxxxxxx>:
> >
> > There is an update to the card generator with
> > an example of dealing a table of bridge.
> >
> > http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> >
> >
> > --- Oleg Kobchenko <olegykj@xxxxxxxxx> wrote:
> >
> > > I have published a script that generates a deck
> > > of cards at a small size both for Pocket PC and i
> > > nteractive compositing for display with  `viewrgb` etc.
> > >
> > >   http://www.jsoftware.com/jwiki/Scripts/Cards_Generator
> > >
> > > It is not necessary to re-run the script, instead the
> > > resulting bitmap can be used with `readbmp`.
> > > The picutre layout allows partially covered stacking.
> > > I hope that with some auxiliary verbs it would be
> > > possible to pack such subsets in an image and
> > > display various arrangements.
> > >
> > >
> > > --- Roger Hui <rhui000@xxxxxxx> wrote:
> > >
> > > > Björn meant presenting the bridge hands using the
> > > > card images as in Solitarie.
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Miller, Raul D" <rdmiller@xxxxxxxxxxxx>
> > > > Date: Tuesday, August 29, 2006 4:29 pm
> > > > Subject: RE: [Jprogramming] Dealing a bridge hand
> > > >
> > > > > Björn Helgason wrote:
> > > > > > More interesting would be to see the hand using the cards
> > > > > > used by Solitaire or similar.
> > > > >
> > > > > For example?
> > > > >
> > > > > (There seem to be hundreds of differing sets of rules for
> > > > > Solitaire, and no standardized representation for the
> > > > > initial state of a Solitaire game.)
> > > >
> > > >
> > > > ----------------------------------------------------------------------
> > > > For information about J forums see http://www.jsoftware.com/forums.htm
> > > >
> > >
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Tired of spam?  Yahoo! Mail has the best spam protection around
> > > http://mail.yahoo.com
> > > ----------------------------------------------------------------------
> > > For information about J forums see http://www.jsoftware.com/forums.htm
> > >
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam protection around
> > http://mail.yahoo.com
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> 
> 
> 
> -- 
> Björn Helgason, Verkfræðingur
> Fugl&Fiskur ehf, Þerneyjarsund 23,
> Skype: gosiminn, gsm: +3546985532
> 801 Grímsnes ,t-póst: gosinn@xxxxxxxxx
> Landslags og skrúðgarðagerð, gröfuþjónusta
> http://groups.google.com/group/J-Programming
> 
> 
> Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans
> 
> góður kennari getur stigið á tær án þess að glansinn fari af skónum
>           /|_      .-----------------------------------.
>          ,'  .\  /  | Með léttri lund verður        |
>      ,--'    _,'   | Dagurinn í dag                     |
>     /       /       | Enn betri en gærdagurinn  |
>    (   -.  |        `-----------------------------------'
>    |     ) |        (\_ _/)
>   (`-.  '--.)       (='.'=)
>    `. )----'        (")_(")
> > ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm


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