Re: [Jprogramming] Question about foreign 2!:0

[bill lam]

Yes, in j806, 2!:0 had changed and implemented using posix_spawn(), but
macos still remained the same and continued to use system() . But you got
trouble on mac mini not linux.

Can you also check running with j805 on linux and mac mini?

On Nov 23, 2017 10:49 PM, "J. Patrick Harrington"  wrote:

> Thanks Chris,
>
> I'm involved with Thanksgiving right now, but will try this ASAP.
>
> On Wed, 22 Nov 2017, chris burke wrote:
>
>> You should be able to do a simple test to see if 2!:0 waits, for example
>> as
>> below. This does wait on my Mac with the same J as you, except the avx
>> version.
>>
>> F=: jpath '~temp/t1.sh'
>> F fwrites~ '#!/bin/bash',LF,'sleep 2',LF,'echo "done"'
>> fmakex F
>>
>> foo=: 3 : 0
>> echo 2!:0 F
>> echo 2+3
>> )
>>
>> foo''
>>
>> On Wed, Nov 22, 2017 at 7:28 PM, J. Patrick Harrington > >
>> wrote:
>>
>> Bill,
>>>
>>>I've tried that. ../synmod.exe < fort.5 > fort.6 in a terinal
>>> window works fine on all three machines. And the directory change
>>> is OK. WHen the program fails on the Mac Mini, the J session is
>>> left in the /home/tages/tlusty205/synspec/jph directory.
>>>
>>> Patrick
>>>
>>> On Thu, 23 Nov 2017, bill lam wrote:
>>>
>>> You can try executing the cmd in bash shell to verify whether it actually
 work on the other machine.

 Also check the cwd in J session to see it is correct.

 On Nov 23, 2017 12:54 AM, "J. Patrick Harrington" 
 wrote:

 A>>A problem has surfaced which has me puzzled. I have written a

>>>
>>> program which needs the results of another program, synmod.exe, which
>>>
 reads in a file, executes for a few seconds, and writes the results
> to the file fort.6 (synmod.exe is my modification of a 10,000 line
> fortran program). The relevant part of my program is as follows:
>
> LAM=: IX=: QX=: <''
> 1!:44 '/home/tages/tlusty205/synspec/jph'
> 'Ti gi lam1 lam2'=. y
> fix55 lam1, lam2NB. put lam1 & lam2 into fort.55
> lngg=. 10^. gi
> nh=. -:#Ti
> i=. _1
> while. (i=. >:i)   Tii=. i{Ti
>   lngi=. i{lngg
>   Kbicub Tii, lngi
>   2!:0 '../synmod.exe < fort.5 > fort.6'
>   Z=. lam2 CLEAN Extract''
>   'mu rad deg lam Flx Ia Qa pol'=. Z
>   LAM=: LAM,    IX=: IX,    QX=: QX,  end.
> 1!:44 '/home/tages/J6/SPIN.d'
>
> The issue here is the Foreign 2!:0. This code works *perfectly* on my
> Dell
> laptop running
>JVERSION
> Engine: j806/j64/linux
> Release: commercial/2017-11-06T09:54:01
> Library: 8.06.09
> Qt IDE: 1.6.2/5.3.2
> Platform: Linux 64
> Installer: J806 install
> InstallPath: /home/tages/j64-806
>
> But... the very same code running on either of the other two machines I
> use fails. The line 2!:0 '../synmod.exe < fort.5 > fort.6'
> should write the results of synmod to the file fort.6, but
> instead defines fort.6 but writes nothing to it. Thus the
> Extract'' routine fails when it tries to read fort.6.
>
> I suspect that while 2!:0 waits for synmod.exe to finish, maybe
> on my other machines it transfers to the next line of the J code
> before fort.6 is written. One of these machines is a Mac Mini running
>JVERSION
>Engine: j806/j64nonavx/darwin
>Release: commercial/2017-11-06T10:18:00
>Library: 8.06.09
>Qt IDE: 1.6.2s/5.6.3
>Platform: Darwin 64
>Installer: J806 install
>InstallPath: /users/jph/j64-806
>
> So I'm asking if the foreign 2!:0 in some cases returns without
> waiting. I thought just 2!:1 did that.
>
> Apologies for the long-winded post,  Patrick
>
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Re: [Jprogramming] Question about foreign 2!:0

[J. Patrick Harrington]

Thanks Chris,

I'm involved with Thanksgiving right now, but will try this ASAP.

On Wed, 22 Nov 2017, chris burke wrote:

You should be able to do a simple test to see if 2!:0 waits, for example as
below. This does wait on my Mac with the same J as you, except the avx
version.

F=: jpath '~temp/t1.sh'
F fwrites~ '#!/bin/bash',LF,'sleep 2',LF,'echo "done"'
fmakex F

foo=: 3 : 0
echo 2!:0 F
echo 2+3
)

foo''

On Wed, Nov 22, 2017 at 7:28 PM, J. Patrick Harrington 
wrote:


Bill,

   I've tried that. ../synmod.exe < fort.5 > fort.6 in a terinal
window works fine on all three machines. And the directory change
is OK. WHen the program fails on the Mac Mini, the J session is
left in the /home/tages/tlusty205/synspec/jph directory.

Patrick

On Thu, 23 Nov 2017, bill lam wrote:


You can try executing the cmd in bash shell to verify whether it actually
work on the other machine.

Also check the cwd in J session to see it is correct.

On Nov 23, 2017 12:54 AM, "J. Patrick Harrington" 
wrote:

A>>A problem has surfaced which has me puzzled. I have written a


program which needs the results of another program, synmod.exe, which

reads in a file, executes for a few seconds, and writes the results
to the file fort.6 (synmod.exe is my modification of a 10,000 line
fortran program). The relevant part of my program is as follows:

LAM=: IX=: QX=: <''
1!:44 '/home/tages/tlusty205/synspec/jph'
'Ti gi lam1 lam2'=. y
fix55 lam1, lam2NB. put lam1 & lam2 into fort.55
lngg=. 10^. gi
nh=. -:#Ti
i=. _1
while. (i=. >:i) fort.6'
  Z=. lam2 CLEAN Extract''
  'mu rad deg lam Flx Ia Qa pol'=. Z
  LAM=: LAM,  fort.6'
should write the results of synmod to the file fort.6, but
instead defines fort.6 but writes nothing to it. Thus the
Extract'' routine fails when it tries to read fort.6.

I suspect that while 2!:0 waits for synmod.exe to finish, maybe
on my other machines it transfers to the next line of the J code
before fort.6 is written. One of these machines is a Mac Mini running
   JVERSION
   Engine: j806/j64nonavx/darwin
   Release: commercial/2017-11-06T10:18:00
   Library: 8.06.09
   Qt IDE: 1.6.2s/5.6.3
   Platform: Darwin 64
   Installer: J806 install
   InstallPath: /users/jph/j64-806

So I'm asking if the foreign 2!:0 in some cases returns without
waiting. I thought just 2!:1 did that.

Apologies for the long-winded post,  Patrick

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Re: [Jprogramming] Partitions

[Raul Miller]

Hmm.. and playing with this idea shows that I'm not on quite on the
right track for the n-2 case.

   +/@, (i.3)=  -~/~^:2 i.3
18
   #3 parMD 5
25

I can get away with bits for the n-1 case, but I need to track two
independent free positions for the n-2 case.

-- 
Raul

On Thu, Nov 23, 2017 at 5:36 AM, 'Mike Day' via Programming
 wrote:
> It's pretty efficient though.
>
> Here's the result of a crude 13 : tacitisation,  resulting from replacing
> all (i.x) by y, and assuming the single argument is n :
> RDM1 =: (([: |. >:/~) #&(,/) ] + (1 j. ] =/ -~/~) #"1"_1 -~/~ ) @: i. @
> <:
>
> |: RDM1 4
> 0 0 0 0 0 0
> 0 1 1 1 1 1
> 1 0 2 1 2 2
> 2 2 0 2 1 2
>
>ts'RDM1 10'
> 0.000420082 216064
>ts'rgfMD/9 10'
> 0.00145139 27264
>
> The main overhead in mine for k=n-1 appears to be in the
> makeinsert routine,  even with a somewhat more efficient
> use of it than in the listing I posted yesterday.I might
> special-case it...
>
> Thanks for using 1j1 in the left arg of # - if I'd ever seen
> that, I'd certainly forgotten it!  V useful.
>
> Perhaps best to leave k=3, n-2, etc, to the existing codes.
>
> I phorgot phumbs... phrom my laptop,
>
> Mike
>
>
>
> On 23/11/2017 09:59, Raul Miller wrote:
>>
>> Well.. hmm...
>>
>> Here's the heart of that k=n-1 expression:
>>
>> (i.x)=/-~/~i.x)
>>
>> For example:
>> (i.4)=/-~/~i.4
>> 1 0 0 0
>> 0 1 0 0
>> 0 0 1 0
>> 0 0 0 1
>>
>> 0 1 0 0
>> 0 0 1 0
>> 0 0 0 1
>> 0 0 0 0
>>
>> 0 0 1 0
>> 0 0 0 1
>> 0 0 0 0
>> 0 0 0 0
>>
>> 0 0 0 1
>> 0 0 0 0
>> 0 0 0 0
>> 0 0 0 0
>>
>> (As you can see, it's not incredibly efficient. It might make sense to
>> transform one of those dimensions into index values to gain an order
>> of magnitude in compactness. You do not have to worry much about index
>> values all 0 rows because those get compressed out later. But the
>> problem you would have to solve is: what do you replace the rightmost
>> # operation with, when working with indices? It will probably be
>> something like an index and ravel and then another transformation to
>> get the partition control list. On the positive side, this should
>> eliminate the need to subtrace/add the rows - which is how I am
>> inserting non-zero values into the final rows with that # operation.)
>>
>> Anyways...
>>
>> In principle you could use a similar expression with a rank-4 bit
>> array which a triangular plane slicing it in a similar fashion (or,
>> ok, maybe map that to a rank 3 array of indices). But of course, you
>> lose an additional order of magnitude in efficiency from the
>> additional array rank - though sparse arrays might help here,
>> depending on how the expressions work. But I've not thought up any
>> good expressions for constructing that array.
>>
>> Thanks,
>>
>
>
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Re: [Jprogramming] Partitions

['Mike Day' via Programming]

It's pretty efficient though.

Here's the result of a crude 13 : tacitisation,  resulting from replacing
all (i.x) by y, and assuming the single argument is n :
    RDM1 =: (([: |. >:/~) #&(,/) ] + (1 j. ] =/ -~/~) #"1"_1 -~/~ ) @: 
i. @ <:


    |: RDM1 4
0 0 0 0 0 0
0 1 1 1 1 1
1 0 2 1 2 2
2 2 0 2 1 2

   ts'RDM1 10'
0.000420082 216064
   ts'rgfMD/9 10'
0.00145139 27264

The main overhead in mine for k=n-1 appears to be in the
makeinsert routine,  even with a somewhat more efficient
use of it than in the listing I posted yesterday.I might
special-case it...

Thanks for using 1j1 in the left arg of # - if I'd ever seen
that, I'd certainly forgotten it!  V useful.

Perhaps best to leave k=3, n-2, etc, to the existing codes.

I phorgot phumbs... phrom my laptop,

Mike


On 23/11/2017 09:59, Raul Miller wrote:

Well.. hmm...

Here's the heart of that k=n-1 expression:

(i.x)=/-~/~i.x)

For example:
(i.4)=/-~/~i.4
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1

0 1 0 0
0 0 1 0
0 0 0 1
0 0 0 0

0 0 1 0
0 0 0 1
0 0 0 0
0 0 0 0

0 0 0 1
0 0 0 0
0 0 0 0
0 0 0 0

(As you can see, it's not incredibly efficient. It might make sense to
transform one of those dimensions into index values to gain an order
of magnitude in compactness. You do not have to worry much about index
values all 0 rows because those get compressed out later. But the
problem you would have to solve is: what do you replace the rightmost
# operation with, when working with indices? It will probably be
something like an index and ravel and then another transformation to
get the partition control list. On the positive side, this should
eliminate the need to subtrace/add the rows - which is how I am
inserting non-zero values into the final rows with that # operation.)

Anyways...

In principle you could use a similar expression with a rank-4 bit
array which a triangular plane slicing it in a similar fashion (or,
ok, maybe map that to a rank 3 array of indices). But of course, you
lose an additional order of magnitude in efficiency from the
additional array rank - though sparse arrays might help here,
depending on how the expressions work. But I've not thought up any
good expressions for constructing that array.

Thanks,




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Re: [Jprogramming] Partitions

[Raul Miller]

Well.. hmm...

Here's the heart of that k=n-1 expression:

   (i.x)=/-~/~i.x)

For example:
   (i.4)=/-~/~i.4
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1

0 1 0 0
0 0 1 0
0 0 0 1
0 0 0 0

0 0 1 0
0 0 0 1
0 0 0 0
0 0 0 0

0 0 0 1
0 0 0 0
0 0 0 0
0 0 0 0

(As you can see, it's not incredibly efficient. It might make sense to
transform one of those dimensions into index values to gain an order
of magnitude in compactness. You do not have to worry much about index
values all 0 rows because those get compressed out later. But the
problem you would have to solve is: what do you replace the rightmost
# operation with, when working with indices? It will probably be
something like an index and ravel and then another transformation to
get the partition control list. On the positive side, this should
eliminate the need to subtrace/add the rows - which is how I am
inserting non-zero values into the final rows with that # operation.)

Anyways...

In principle you could use a similar expression with a rank-4 bit
array which a triangular plane slicing it in a similar fashion (or,
ok, maybe map that to a rank 3 array of indices). But of course, you
lose an additional order of magnitude in efficiency from the
additional array rank - though sparse arrays might help here,
depending on how the expressions work. But I've not thought up any
good expressions for constructing that array.

Thanks,

-- 
Raul


On Thu, Nov 23, 2017 at 3:45 AM, 'Mike Day' via Programming
 wrote:
> Wow - more than I could manage with my phone and phingers!
>
> Or desktop!
>
> So have we got closed forms for k=3,  k=n-2?
>
> M
>
>
> On 23/11/2017 02:49, Raul Miller wrote:
>>
>> Hmm... right - it corresponds to an upper (or lower) triangular matrix,
>> not
>> the identity matrix. So...
>>
>> (|.>:/~i.x)#&(,/)(i.x)+(1 j.(i.x)=/-~/~i.x)#"1"_1-~/~i.x
>>
>> In other words, once again, oops. (But at least, this time, I tested the
>> expression. Though I know it could be refactored to be more concise-- but
>> the phone UI is too clumsy for that...)
>>
>> Thanks,
>>
>
>
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Re: [Jprogramming] Partitions

['Mike Day' via Programming]

Wow - more than I could manage with my phone and phingers!

Or desktop!

So have we got closed forms for k=3,  k=n-2?

M


On 23/11/2017 02:49, Raul Miller wrote:

Hmm... right - it corresponds to an upper (or lower) triangular matrix, not
the identity matrix. So...

(|.>:/~i.x)#&(,/)(i.x)+(1 j.(i.x)=/-~/~i.x)#"1"_1-~/~i.x

In other words, once again, oops. (But at least, this time, I tested the
expression. Though I know it could be refactored to be more concise-- but
the phone UI is too clumsy for that...)

Thanks,




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Re: [Jprogramming] (no subject)

['Skip Cave' via Programming]

Thanks Bo, Roger, & Mike. All useful ways to create big integers of all one
digit!

Skip


On Thu, Nov 23, 2017 at 2:37 AM, 'Bo Jacoby' via Programming <
programm...@jsoftware.com> wrote:

>9%~1-~10^50x
>
> 11
> without using any array
>
>
> Den 9:33 torsdag den 23. november 2017 skrev 'Skip Cave' via
> Programming :
>
>
>  Thanks Bo.
> I also found this:
> (50#10)#.1x
> 11
>
> Skip Cave
>
>
> On Thu, Nov 23, 2017 at 2:26 AM, 'Bo Jacoby' via Programming <
> programm...@jsoftware.com> wrote:
>
> >+/10^i.50x
> > 11
> >
> >Den 9:17 torsdag den 23. november 2017 skrev 'Skip Cave' via
> > Programming :
> >
> >
> >  I want to greate an integer with all ones:
> >
> >  ".10#'1'
> >
> > 11
> >
> >
> >  datatype ".10#'1'
> >
> > integer
> >
> >
> >  ".15#'1'
> >
> > 111
> >
> >  datatype ".15#'1'
> >
> > integer
> >
> >
> >  ".20#'1'
> >
> > 1.1e19
> >
> >
> > NB. Drat! it seitched to floating.
> >
> >
> >datatype ".20#'1'
> >
> > floating
> >
> > NB. So I need to use extended precision:
> >
> >x:".20#'1'
> >
> > 0656
> >
> >
> > NB. Uh oh! something is wrong. Not all ones!
> >
> >
> >datatype x:".20#'1'
> >
> > rational
> >
> >
> > NB. Rational? What happened to extended precision?
> >
> > NB. So how do I create an integer with say, 50 onres?
> >
> >
> >x:".50#'1'
> >
> > 0805019569335803527359330256945152
> >
> >
> > NB. Nope!
> >
> >
> >
> > Skip Cave
> > --
> > 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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Re: [Jprogramming] (no subject)

['Mike Day' via Programming]

or with a scalar power:

    (,~#@:":)    (9%~<:&(10&^)@: x:)   50   NB. showing result and its size

50 11


OK?


Mike


On 23/11/2017 08:26, 'Bo Jacoby' via Programming wrote:

    +/10^i.50x
11

 Den 9:17 torsdag den 23. november 2017 skrev 'Skip Cave' via Programming 
:
  


  I want to greate an integer with all ones:

   ".10#'1'

11


   datatype ".10#'1'

integer


   ".15#'1'

111

   datatype ".15#'1'

integer


   ".20#'1'

1.1e19


NB. Drat! it seitched to floating.


     datatype ".20#'1'

floating

NB. So I need to use extended precision:

     x:".20#'1'

0656


NB. Uh oh! something is wrong. Not all ones!


     datatype x:".20#'1'

rational


NB. Rational? What happened to extended precision?

NB. So how do I create an integer with say, 50 onres?


     x:".50#'1'

0805019569335803527359330256945152


NB. Nope!



Skip Cave
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Re: [Jprogramming] (no subject)

[Erling Hellenäs]

   (15#10)#.15#1
111
   (25x#10x)#.25x#1x
1
/Erling

Den 2017-11-23 kl. 09:17, skrev 'Skip Cave' via Programming:

I want to greate an integer with all ones:

".10#'1'

11


datatype ".10#'1'

integer


".15#'1'

111

datatype ".15#'1'

integer


".20#'1'

1.1e19


NB. Drat! it seitched to floating.


 datatype ".20#'1'

floating

NB. So I need to use extended precision:

  x:".20#'1'

0656


NB. Uh oh! something is wrong. Not all ones!


 datatype x:".20#'1'

rational


NB. Rational? What happened to extended precision?

NB. So how do I create an integer with say, 50 onres?


 x:".50#'1'

0805019569335803527359330256945152


NB. Nope!



Skip Cave
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Re: [Jprogramming] (no subject)

[Roger Shepherd]

10#.40#1x

datatype 10#.40#1x
extended

Sent from Mail for Windows 10

From: 'Skip Cave' via Programming
Sent: Thursday, November 23, 2017 3:17 AM
To: programm...@jsoftware.com
Subject: [Jprogramming] (no subject)

I want to greate an integer with all ones:

   ".10#'1'

11


   datatype ".10#'1'

integer


   ".15#'1'

111

   datatype ".15#'1'

integer


   ".20#'1'

1.1e19


NB. Drat! it seitched to floating.


datatype ".20#'1'

floating

NB. So I need to use extended precision:

 x:".20#'1'

0656


NB. Uh oh! something is wrong. Not all ones!


datatype x:".20#'1'

rational


NB. Rational? What happened to extended precision?

NB. So how do I create an integer with say, 50 onres?


x:".50#'1'

0805019569335803527359330256945152


NB. Nope!



Skip Cave
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Re: [Jprogramming] (no subject)

['Skip Cave' via Programming]

Thanks Bo.
I also found this:
(50#10)#.1x
11

Skip Cave


On Thu, Nov 23, 2017 at 2:26 AM, 'Bo Jacoby' via Programming <
programm...@jsoftware.com> wrote:

>+/10^i.50x
> 11
>
> Den 9:17 torsdag den 23. november 2017 skrev 'Skip Cave' via
> Programming :
>
>
>  I want to greate an integer with all ones:
>
>   ".10#'1'
>
> 11
>
>
>   datatype ".10#'1'
>
> integer
>
>
>   ".15#'1'
>
> 111
>
>   datatype ".15#'1'
>
> integer
>
>
>   ".20#'1'
>
> 1.1e19
>
>
> NB. Drat! it seitched to floating.
>
>
> datatype ".20#'1'
>
> floating
>
> NB. So I need to use extended precision:
>
> x:".20#'1'
>
> 0656
>
>
> NB. Uh oh! something is wrong. Not all ones!
>
>
> datatype x:".20#'1'
>
> rational
>
>
> NB. Rational? What happened to extended precision?
>
> NB. So how do I create an integer with say, 50 onres?
>
>
> x:".50#'1'
>
> 0805019569335803527359330256945152
>
>
> NB. Nope!
>
>
>
> Skip Cave
> --
> For information about J forums see http://www.jsoftware.com/forums.htm
>
>
> --
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>
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Re: [Jprogramming] (no subject)

['Bo Jacoby' via Programming]

   +/10^i.50x
11 

Den 9:17 torsdag den 23. november 2017 skrev 'Skip Cave' via Programming 
:
 

 I want to greate an integer with all ones:

  ".10#'1'

11


  datatype ".10#'1'

integer


  ".15#'1'

111

  datatype ".15#'1'

integer


  ".20#'1'

1.1e19


NB. Drat! it seitched to floating.


    datatype ".20#'1'

floating

NB. So I need to use extended precision:

    x:".20#'1'

0656


NB. Uh oh! something is wrong. Not all ones!


    datatype x:".20#'1'

rational


NB. Rational? What happened to extended precision?

NB. So how do I create an integer with say, 50 onres?


    x:".50#'1'

0805019569335803527359330256945152


NB. Nope!



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[Jprogramming] (no subject)

['Skip Cave' via Programming]

I want to greate an integer with all ones:

   ".10#'1'

11


   datatype ".10#'1'

integer


   ".15#'1'

111

   datatype ".15#'1'

integer


   ".20#'1'

1.1e19


NB. Drat! it seitched to floating.


datatype ".20#'1'

floating

NB. So I need to use extended precision:

 x:".20#'1'

0656


NB. Uh oh! something is wrong. Not all ones!


datatype x:".20#'1'

rational


NB. Rational? What happened to extended precision?

NB. So how do I create an integer with say, 50 onres?


x:".50#'1'

0805019569335803527359330256945152


NB. Nope!



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