Quick followup. I realized you don't have to mess with (somewhat
awkward) AV File Manager to see files in Android/data. I finally looked
at J documentation at wiki/Plot/Commands/Output commands and saw pdf
[file w h]! Never knew you could direct the plot to any desired folder.
So I just
igure out the correct locations of the
data files and scripts I want to use ...
Best regards, Patrick
On 11/8/23 11:50 AM, 'Kenneth Lettow' via Programming wrote:
The apk for android is available here:
https://www.jsoftware.com/download/j9.5/install/ .
On Wed, Nov 8, 2023 at 11:37 AM J. Patrick Harri
...
Best regards, Patrick
On 11/8/23 11:50 AM, 'Kenneth Lettow' via Programming wrote:
The apk for android is available here:
https://www.jsoftware.com/download/j9.5/install/ .
On Wed, Nov 8, 2023 at 11:37 AM J. Patrick Harrington wrote:
Hello all,
While I've not posted for a while, I've been
Hello all,
While I've not posted for a while, I've been a J user for many decades.
At present I'm running j9.4 and j9.5 on a mac mini and my Dell xps 13
under Ubuntu 22.04. I generally use jqt. All this is good.
What I'm seeking help with is J for android. Back in Jan 2022, I
acquired a
wrote:
Your 9.4 file looks fine.
I'm guessing your desktop manager does not like the name with the extra dot.
What Desktop manager are you running?
Try renaming the Desktop/jqt9.4.desktop to replace the . with dot.
On Wed, Apr 12, 2023 at 1:23 PM J. Patrick Harrington wrote:
Yes, I ran
not work, but could
give hints to the problem.
load'pacman'
shortcut_jpacman_'jc' NB. 'jhs' and 'jqt'
On Wed, Apr 12, 2023 at 12:48 PM J. Patrick Harrington wrote:
I have just reinstalled j9.4 on my Dell XPS13 laptop running linux -
Ubuntu 20.04.6 LTS.
The install seemed normal. I can start
I have just reinstalled j9.4 on my Dell XPS13 laptop running linux -
Ubuntu 20.04.6 LTS.
The install seemed normal. I can start and run J with a "j9.4/bin/jqt &"
command. But the J icons never appeared on the desktop as they have in
the past. Any pointers on what went wrong and how to fix it?
I've found a two argument arctan indispensable and have always had these
in my startup:
atan2=: 13 : '2p1|((0>1{"1 y)*1p1)+2p1+_3 %/"1 y' NB. arrays OK,
0{:"1 y)*(*{."1 y)'
NB. _1p1
For example:
(180%1p1)* atan2 1 1
45
(180%1p1)* atan2 _1 _1
225
(180%1p1)* atan3 1 1
45
a .wav reader/writer here:
https://github.com/mlochbaum/JSound/blob/master/wav.ijs
It only works on fairly basic files, and I'm not maintaining it any
more, but it could be worth a try.
Marshall
On Sun, Apr 03, 2022 at 02:19:48PM -0400, J. Patrick Harrington wrote:
I have been investigating some dat
And still further,
load 'media/wav/view'
wavview 'name.wav'
works under Ubuntu Linux for the test1.wav file (opens viewing window,
etc.) but fails for my file -- maybe a size issue.
Yes, because it does work for my "black-2x,wav' file. Which has a size
of 1222011. And 2 wavfile loads the
. It's possible
there are nonstandard chunks in the file which are messing the parser
up. Try running e.g. 'ffmpeg -i x.wav y.wav', if your file is x.wav,
and see if you have better luck processing y.wav.
-E
On Sun, 3 Apr 2022, J. Patrick Harrington wrote:
I have been investigating some data
. It's possible
there are nonstandard chunks in the file which are messing the parser
up. Try running e.g. 'ffmpeg -i x.wav y.wav', if your file is x.wav,
and see if you have better luck processing y.wav.
-E
On Sun, 3 Apr 2022, J. Patrick Harrington wrote:
I have been investigating some
I have been investigating some data in the form of .wav files taken with
a compact digital audio recorder. In the addons I found the tools by
Oleg K under media/wav. One limitation is that they seem to work only
under windows. I normally work under Ubuntu linux or even Mac OS. I do
have a PC
Thanks for the explanation & the rationale behind the change. I have
been running Ubuntu 16.04 for longer than I realized. Installing a new
Ubuntu always comes with some broken features which take time to fix.
But I did install Ubuntu 20.04 a few days ago. First, all the icons on
the desktop
I just did the upgrade from j903-beta-h (or whatever the previous beta
was) and while it
seemed to upgrade OK, now j903 fails:
jph@jph-XPS-13-9300:~$ cd j903/bin/
jph@jph-XPS-13-9300:~/j903/bin$ ./jqt
Load library /home/jph/j903/bin/libj.so failed:
jph@jph-XPS-13-9300:~/j903/bin$ ./jconsole
I sent this message from an account which I think is unknown to the j
forum. Hope it doesn't appear twice.
Forwarded Message
Subject:Fwd: read failure on Mac j903 beta-h
Date: Fri, 9 Apr 2021 14:14:33 -0400
From: JAMES PATRICK HARRINGTON
To:
I was wondering about the rational for the choice of the cube root
returned for a negative number. I expected the real root to be returned,
e.g., (_8)^(%3) --> _2 but J gives 1j1.73205. This is the case in other
languages as well, so no doubt there is a mathematical justification for
this. In
Thanks Chris,
All is good now. Glad to help squash a bug.
Patrick
On 8/5/20 10:47 AM, chris burke wrote:
Thanks, this should be fixed now.
On Tue, Aug 4, 2020 at 9:02 PM J. Patrick Harrington wrote:
I have little routine to plot a compass circle and a line showing the
heading to a radio
I have little routine to plot a compass circle and a line showing the
heading to a radio source. I want to plot the letters N, E, S, W and a
legend giving the distance to the source. Here's a bit of the code:
xc=. }: 1p1*int01 2000
sx=. 0.85*sin xc
cx=. 0.85*cos xc
pd 'reset'
pd options
pd
which is 66 times slower. Both give same results.
Patrick
On Sat, 8 Feb 2020, J. Patrick Harrington wrote:
And a little more noise:
u=. 1e6 3$rand 3e6
v=. 1e6 3$rand 3e6
ts'z1=. u cross"(1 1) v'
0.88737 3.35571e7
ts'z2=. u cp"(1 1) v'
2.12978 3.3558e7
ind=. 3e5+ i. 4
i
_0.294769 0.605469 _0.617259
ind{z2
_0.0415101 0.458711 _0.371054
_0.0240905 _0.0474326 0.0622632
0.108878 _0.558303 0.207895
_0.294769 0.605469 _0.617259
So u cross"(1 1) v is faster.
But u cross v is broken.
Will look into that :-(
On Sat, 8 Feb 2020, J. Patrick Harrington wrote
Oh-oh. I've screwed something up.
We can get correct results for arrays thus
u cp"(1 1) v
which agrees with
u cross"(1 1) v
but seems *not* to agree with my
u cross v
I'll need to look into this! And into timings.
Sorry for the noise...
Patrick
On Sat, 8 Feb 2020, J. Patrick
of vectors as part
of Monte Carlo scattering computations, so it must be fast.
Patrick
On Sat, 8 Feb 2020, R.E. Boss wrote:
https://code.jsoftware.com/wiki/Phrases/Matrices#Vector_cross_product
R.E. Boss
-Oorspronkelijk bericht-
Van: Programming
Namens J. Patrick Harrington
Verzonden
Note that the Complete Tensor formula gives a left-handed result,
i.e., x-axis cross y-axis = negative z-axis
CT =: C.!.2 @ (#:i.) @ $~
ip=: +/ .*
crossCT=: [ ip CT@#@[ ip ]
1 0 0 crossCT 0 1 0
0 0 _1
while
cross=: ((1: |.[)*(_1: |. ]))-((_1: |.[)*(1:|.]))
1 0 0 cross 0 1
Something I've used on big arrays is this:
cross=: ((1: |.[)*(_1: |. ]))-((_1: |.[)*(1:|.]))
E.g.
v=. 2 1 7
u=. _3 4 _1
u cross v
29 19 _11
rand=: ?@# 0:
u=. 1e6 3$rand 3e6
v=. 1e6 3$rand 3e6
ts'z=. u cross v'NB. time & space
0.054138 1.00665e8
$z
100 3
Give it
I assumed it should have been
'upgrade' jpkg 'jengine'
and that worked for me.
Patrick
On Tue, 3 Dec 2019, 'Mike Day' via Programming wrote:
I hadn't noticed the new method, and used the old one, same as you -
but now you mention it, Eric's advice looks strange in Thunderbird, with
only
Bill,
Thank you for an impressive display of detective work!
-Patrick
--
For information about J forums see http://www.jsoftware.com/forums.htm
a CID font such as
pd 'captionfont MSung-Light 15'
Then plot will encode the text as 16-bit ucs unicode which is
the encoding expected by acrobat and output is ok.
Thu, 13 Jun 2019, J. Patrick Harrington написал(а):
I generated a pdf file of the plot using j807 in Ubuntu and find it also
produces a plot
I generated a pdf file of the plot using j807 in Ubuntu and find it also
produces a plot with the 1/4 character -- and again pd 'show' displays the
figure with μ correctly. At this point, I haven't a clue ...
On Thu, 13 Jun 2019, J. Patrick Harrington wrote:
Bill,
Ubuntu does use evince
support. On
Ubuntu it may use evince as pdf reader, you can try another pdf reader to
open the ~/temp/plot.pdf to see if it works.
On Wed, Jun 12, 2019, 11:49 PM J. Patrick Harrington
wrote:
I would like to put a Greek \mu (μ) in the y-axis label of a plot. If I
just cut & paste the sy
On Wed, 12 Jun 2019, Brian Schott wrote:
I find that does produce the μ for pd 'show', but I still get that
1/4 character in the pdf file generated by pd 'pdf'.
When I entered the result of the following line (shown) into vim, it
produced µ .
'ycaption Polarization (-Q/I) for ',(5 u: 'µ'),'
dcopy to print it, the result shows an upside
down ? in the pdf preview where the µ was. But if I copy that line in
vim and use vim's r for replace and enter µ, the copied line prints
correctly while the original has inverted ?.
Mac OS.
On Wed, Jun 12, 2019 at 11:49 AM J. Patrick Harrington
wr
I would like to put a Greek \mu (μ) in the y-axis label of a plot. If I
just cut & paste the symbol it looks OK in the pd command
pd 'ycaption Polarization (-Q/I) for μ = 0.1'
and when I do pd'show' or pd'jpg' the result is fine, but pd'pdf' gives
a 1/4 character instead of μ. Any
I use splines all the time for various puposes. You can find a bunch
of variations on my web page at http://www.astro.umd.edu/~jph/splines.ijs
There is also a least squares spline routine on my page
(http://www.astro.umd.edu/~jph/J_page.html) down at the bottom.
I've not compared these with the
Just a note on my experience with Jupyter. My main computer
is a Dell XPS-13 running Ubuntu 18.04.1 (upgraded from the
16.04 that was factory installed). Python is version 3.6.3.
I had installed Jupyter over a year ago for an "astropy"
workshop, so all I needed to do was put "jkernel" in
Hey! I have had this plot problem with 807 on my mac mini (novax).
Never had time to run it down, thought it was my code.
But this fixed it! Thanks indeed!
Patrick
On Tue, 22 Jan 2019, Joey K Tuttle wrote:
After update, nonavx and avx versions produce expected plot results - thanks
for the
Just installed beta-g
JVERSION
Engine: j807/j64/linux
Beta-g: commercial/2018-07-02T12:43:58
Library: 8.07.16
Qt IDE: 1.7.1/5.5.1
Platform: Linux 64
Installer: J807 install
Most things I've tried seem OK.
But the Fast Fourier Transform lab still crashes as before.
Does anyone know how to
to correct the cd usage.
One possibility is to step through 807 side-by-side with 806 and see where
things go bad.
On Wed, May 30, 2018 at 11:53 AM, J. Patrick Harrington
wrote:
My last message about my linux (Ubuntu) laptop with missing labs was my
error -- I had somehow started the j805
take a few
seconds to run.
)"
and then crashing.
FYI,
Mike
On 29/05/2018 21:57, J. Patrick Harrington wrote:
>
> Just installed j64-807 (nonavx) on an old windows machine.
> Trying some things, I ran the Fast Fourier Transform lab. As soon as it
> got to the part where
did not try on windows.
Ср, 30 мая 2018, bill lam написал(а):
sorry, this had been reported previously but no time to look then. I'll
take a look .
On Wed, May 30, 2018, 4:57 AM J. Patrick Harrington
wrote:
> Just installed j64-807 (nonavx) on an old windows machine.
> Trying some things,
Just installed j64-807 (nonavx) on an old windows machine.
Trying some things, I ran the Fast Fourier Transform lab. As soon as it
got to the part where it should compute a complex transform, it crashes.
That lab runs fine in under j64-806 (nonavx).
On Sat, 26 May 2018, Eric Iverson wrote:
The
Just installed 807 e on my Ubuntu-running laptop & my old mac-mini.
This was the smoothest install ever. No issues yet.
Great work guys!
On Sat, 26 May 2018, Eric Iverson wrote:
The 807 beta-e zip install packages for windows/linux/macos are available.
Henry has done a lot more work to
Thomas,
Just wanted to say that I find this very interesting. As an astronomer, I
have lots of .fits data from HST observations. I've not worked with them
for a while -- when I did I used IDL routines written by Space Telescope
staff. If I were to go back to them now, I probably would use
rver. There is no "arch" It seems
that the old Greeks had it right- as ships went off into the distance, they
didn't just shrink and remain whole but would also disappear gradually from
the bottom up. What Patrick Harrington said is at the core of what is
actually observed.
Don Kelly
On 20
The way to avoid loss of accuracy is to expand in a binomial series:
D = R - √(R²-L²) = R[ 1 - (1 - (L/R)^2)^(1/2)]
= R[ 1 - (1 -(1/2)(L/R)^2 + ...)] = (1/2) L*L/R
and thus
]D=. -:L*L%R
1.76384e_9
On Tue, 27 Feb 2018, Ian Clark wrote:
In "The Curious Incident of the Dog in the
Indeed. The (ideal) distance to the horizon (the point where your line of
sight is tangent to the spherical ocean surface) depends upon your height
above the surface of the ocean. That would have to enter into your
formula. The curvature would be easy to see from the space station...
Patrick
Eric,
I'm interested in this. Python is the fastest growing language
with astronomers -- the astropy package has really useful routines.
I don't really understand much about this, but I put j.py and j_config.py
into my python3 directory & edited the paths in j_config.py.
Starting python3,
0x1
2.71828
9!:14''
j806/j64/linux/release/commercial/www.jsoftware.com/2017-11-06T09:54:01
and same result on the nonavx version of 806 on my mac.
On Sat, 16 Dec 2017, Henry Rich wrote:
When I try it (on a couple of different J versions) I get
0x1
0
0x0
0
etc.
If your error
nded to all those
years ago.
- joey
On 2017Nov 25, at 12:14, chris burke <cbu...@jsoftware.com> wrote:
hostcmd_j_ is Joey's cover for 2!:0, e.g. see
www.jsoftware.com/pipermail/programming/2017-April/047204.html
On Sat, Nov 25, 2017 at 12:06 PM, J. Patrick Harrington <j...@astro.u
Sorry, I meant "returning with no screen output'
I am now running the full program with hostcmd_j_ for 2!:0.
It's chugging away, hasn't failed yet. :-)
On Sat, 25 Nov 2017, J. Patrick Harrington wrote:
Chris,
That test works. I just tried
hostcmd_j_ '../synmod.exe < fort.5
writes~ y
H fwrites~ ''
hostcmd_j_ F,' < ',G,' > ', H
smoutput freads H
)
foo 'hello'
On Sat, Nov 25, 2017 at 10:22 AM, J. Patrick Harrington <j...@astro.umd.edu>
wrote:
Chris,
I have finally got back to my mac to test this. I have installed
the latest j806 to make su
sion 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 A
/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 <j...@astro.umd.edu>
wrote:
Bill,
I've tried that. ../synmod.exe < fort.5 > fort.6 in a terinal
wi
, 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" <j...@astro.umd.edu> wrote:
A>>A problem has surf
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
Hi Skip,
ML (Machine Learning) is a really hot topic and we all need to know
something about it since it will more and more affect our lives.
I've been sitting in on a course here at U of Maryland called
"Machine Learning for Physicists". I can't follow it at depth, but it
is an
Not "real world", more "out ot this world". I use J for most of my
exploratory calculations in astrophysics. E.g.,
http://www.astro.umd.edu/~jph/J_page.html
Cheers, Patrick
On Tue, 10 Oct 2017, Rob B wrote:
My many trips around the J home website have given me the impression that J is
very
Eric,
I get the same results as Joey. In addition,
names_jj_ 0
PASS SERVER TAR URL
posttemplate
and PASS has the password I entered and SERVER has
192.168.0.19:65001
Patrick
On Wed, 9 Aug 2017, Joey K Tuttle wrote:
VERSION_j_
701.1 2
jj
|value error: jj
?
On Wed, Jul 5, 2017 at 2:59 PM, J. Patrick Harrington <j...@astro.umd.edu>
wrote:
Thank you Eric!
I've just tried j701 on my iPhone 6+. The new keyboard is a *vast*
improvement making the entry of the most common
characters much more convenient.
My phone was jailbroken for years, whic
Sorry, I didn't see the lower part of the ? notes.
Thanks.
On Wed, 5 Jul 2017, Eric Iverson wrote:
scroll to near the end of the blue ? page and you will see a section
'customize J at start up'.
Short answer. enter: je'startup'
On Wed, Jul 5, 2017 at 4:38 PM, J. Patrick Harrington &l
Eric,
Is there a file which j701 reads on startup,
or is there another way to avoid having to type
load 'my_profile'
every time?
Patrick
--
For information about J forums see
Thank you Eric!
I've just tried j701 on my iPhone 6+. The new keyboard
is a *vast* improvement making the entry of the most common
characters much more convenient.
My phone was jailbroken for years, which made it easy to
move files onto the J app, but eventually I was forced to
upgrade to
export UBUNTU_MENUPROXY= QT_QPA_PLATFORMTHEME=appmenu-qt5
inside your ~/.profile
it may need to log out and then log in again to take effect.
Ср, 24 май 2017, J. Patrick Harrington написал(а):
Bill, I just put the new lines in jqt.sh with the following results:
Starting jqt from the icon
Ср, 24 май 2017, J. Patrick Harrington написал(а):
I second this question. I run J on my laptop under Ubuntu 16.04. I have
never found a way to enter Ctrl+J to advance labs. I have to click on
Help -> Studio -> Advance. Not at all easy to go through the labs.
JVERSION
Engine: j806/j64
I second this question. I run J on my laptop under Ubuntu 16.04. I have
never found a way to enter Ctrl+J to advance labs. I have to click on
Help -> Studio -> Advance. Not at all easy to go through the labs.
JVERSION
Engine: j806/j64avx/linux
Beta-1: commercial/2017-03-09T10:14:43
Library:
jqt. Perhaps this is related Qt Library or desktop.
Вс, 08 янв 2017, J. Patrick Harrington написал(а):
I'm running jqt under Ubuntu 16.04 on a Dell XPS laptop.
I'd like to work through the labs, but the shortcut which
is supposed to be Ctrl-J has no effect on this machine. I've
tried other
I'm running jqt under Ubuntu 16.04 on a Dell XPS laptop.
I'd like to work through the labs, but the shortcut which
is supposed to be Ctrl-J has no effect on this machine. I've
tried other key combinations, but nothing seems to work.
I can use the Help>Studio>Advance menu, but that's rather
if everything is OK.
Regards,
Patrick
On Wed, 21 Dec 2016, bill lam wrote:
try install the required package from distro, e.g.
sudo aptitude install libqt5websockets5
On 21 Dec, 2016 1:03 am, "J. Patrick Harrin
Oh! that's what's going on. I have a mac-mini running the latest OS
(10.12.2) and I got the same junk from sierra-fix command. I ended up
defining executable files with contents like:
/Applications/j64-805/bin/jqt.command &
/Applications/j64-805/bin/jconsole
So how do I create a J icon for jqt? I get the jc805 and jhs805 icons, but
the only way I can start qt is to click on the jqt.command file in
j64-805/bin/ The green jqt.app icon in j64-805 does nothing and the "jqt"
file in j64-805/bin/ throws up a window that says:
Js-Mac-mini:~ jph$
I've just tried installing j64-805 on my linux box and have
run into a problem. The linux distribution we are running in
the department here is
"Red Hat Enterprise Linux Server release 7.2 (Maipo)"
When I start jconsole I get:
Juno: ./jconsole.sh
|noun result was required
| 0=1!:4
--
Raul
On Wed, Jul 13, 2016 at 12:42 AM, J. Patrick Harrington
<j...@astro.umd.edu> wrote:
That was even worse. All the LF's or CR's being removed.
I have been loading a file -- here's one last try, typed by hand :-(
-
qRot=: dy
That was even worse. All the LF's or CR's being removed.
I have been loading a file -- here's one last try, typed by hand :-(
-
qRot=: dyad define
'u w'=. y
u=. u*sin-:w
t=. +: u cross x
x+ (t*cos-:w)+ u cross t
)
L=: +/"1 &. (*:"_)
Rats! The code I posted was mangled by the mailer.
This time I'll leave out the comments.
--
qRot=: dyad define
'u w'=. y
u=. u*sin-:w
t=. +: u cross x
x+ (t*cos-:w)+ u cross t
)
L=: +/"1 &. (*:"_)
norm=: ] % L
cross=: (([:
I don't know what I was thinking when I posted yesterday
about quaternion based rotations, but that was an old routine
that I've replaced by this one, which is simpler. Sorry to
continue a somewhat off-topic post.
--
NB. Rotate n
I do a lot of rotations, and usually use quaternions. Experts say
they do not suffer from "gimbal lock" which can occur with Euler
angles. I know this is not the form you asked about, but just to
throw this out there, here's what I use:
Same result on OS 10.10.5
2ic 1633837924 101
dcbae
JVERSION
Engine: j803/2014-10-19-11:11:11
Library: 8.04.11
Qt IDE: 1.4.5/5.4.2
Platform: Darwin 64
Installer: J804 install
InstallPath: /users/jph/j64-804
On Tue, 25 Aug 2015, 'Pascal Jasmin' via Programming wrote:
Does this result also
I've no idea how I would do that. It's been years since
I've done anything but run verbs that I developed on
my laptop and then copied over to the iPhone.
On Sat, 11 Jul 2015, bill lam wrote:
Can the new iPhone run pacman?
--
But
1000 ts '%. a
0.00203444 239040
Hmmm...
On Fri, 10 Jul 2015, J. Patrick Harrington wrote:
a=. 50 50$ rand 2500
10 ts '%. a'
0.0049867 239040
(ts=: 6!:2 , 7!:2@])
--
For information about J forums see
I've just upgraded my old iPhone 4S to a new 6 Plus.
It's still small enough to fit in my pocket, and the
extra screen real estate makes running J nicer.
Of course the new phone comes with the current version
of iOS: 8.4. Thinking it would be the easiest way to
move files in and out of J, I
/JKT_Benchmark
On Fri, Jul 10, 2015 at 1:22 PM, J. Patrick Harrington j...@astro.umd.edu
wrote:
I've just upgraded my old iPhone 4S to a new 6 Plus.
It's still small enough to fit in my pocket, and the
extra screen real estate makes running J nicer.
Of course the new phone comes with the current
Jon,
If you are looking for a standard numerical solution, here are
is the standard Runge-Kutta approach, translated to J from Fortran:
http://www.astro.umd.edu/~jph/runge_kutta.ijs
and for stiff diff-eq's:
http://www.astro.umd.edu/~jph/stiff.ijs
As applied to the classic astrophysics
(I apologize in advance for not digging into the
available documentation.)
I'm trying to make some plots for a scientific poster
without going outside J. Using the wd commands I
can do almost all I want, and with wd 'pdf', generate
a portable figure to drag into my poster. But ...
The numbers
Brian,
Thanks so much: titlefont, labelfont captionfont are
exactly what I needed.
I still have to figure out the geek characters, but I
can always spell them out :-(
Patrick
On Tue, 18 Nov 2014, Brian Schott wrote:
Patrick,
If you search on the
.
Patrick
On Tue, 18 Nov 2014, J. Patrick Harrington wrote:
When I do a. i. 'mu' (can't type the mu on this limux box),
I get 194 181
This is true on my Macbook Pro for both J602 J802.
On Tue, 18 Nov 2014, Marshall Lochbaum wrote:
To clarify, I'm working
:00PM -0500, J. Patrick Harrington wrote:
When I do a. i. 'mu' (can't type the mu on this limux box),
I get 194 181
This is true on my Macbook Pro for both J602 J802.
On Tue, 18 Nov 2014, Marshall Lochbaum wrote:
To clarify, I'm working on Linux.
Marshall
On Tue, Nov 18, 2014 at 03:09:36PM
Chris,
I saw this email and just plunged ahead to install the update on
my MacBook Pro running OS 10.6.8. Steps 1 2 went fine, though it
tool a rather long time for the download of the Qt binaries.
But, when I tried to start jqt, I get:
[Uni:~/j64-802/bin] jph% jqt
dyld: Library not
/Vocabulary/quotem)
On Sun, Jul 6, 2014 at 3:51 PM, J. Patrick Harrington j...@astro.umd.edu
wrote:
Too bad that only works for the few constant functions:
_9: _8: ... 0: 1: ... 9:
so am=: 13 : 'x 8:`[`]}y'
3 am i. 11
0 1 2 8 4 5 6 7 8 9 10
but you can't use a general value:
am=: 13 : 'x
On my MacBook Pro, 2.4 GHz Intel Core 2 Duo:
JVERSION
Engine: j701/2011-01-10/11:25 build: Feb 6 2011 16:16:29
Library: 8.02.10
Qt IDE: 1.1.3/5.3.0
Platform: Darwin 64
Installer: J802 install
InstallPath: /users/jph/j64-802
x=: 1e6 $ ' '
y=: a. {~ ? 1e6 $ 256
%/ 100 (6!:2) '/:~x' ;
I've always liked this economy of assignment:
'e f g'=. s=. 1 2;3 4;5 6
f
3 4
e
1 2
-- but I wondered if it were possible to extend
this where the left hand side is not explicit:
abc=. 'a';'bb';'ccc'
┌─┬──┬───┐
│a│bb│ccc│
└─┴──┴───┘
I found I could make a single assignment:
(1{abc)=.
/2014 12:58 PM, J. Patrick Harrington wrote:
I've always liked this economy of assignment:
'e f g'=. s=. 1 2;3 4;5 6
f
3 4
e
1 2
-- but I wondered if it were possible to extend this where the left hand
side is not explicit:
abc=. 'a';'bb';'ccc'
┌─┬──┬───┐
│a│bb│ccc│
└─┴──┴───┘
I found I
Sorry, forgot the link!
http://www.astro.umd.edu/~jph/runge_kutta.ijs
On Wed, 7 May 2014, J. Patrick Harrington wrote:
Here is a Runge Kutta integrator (using the Cash-Karp 5th order
method) that I know works. But it is very un-J-like: I just
transcribed the Fortran from Numerical Recipes
The idea of J with APL (or APL-like) characters is a perennial topic.
Many of us (myself included) feel that there is a beauty in those symbols.
But I don't think the Jsoftware group should devote *any* time to such
a project. (And I don't think there is any danger of that.)
There are other
even shorter:
diag4=: *=@\:
diag4 9 7 5 3
9 0 0 0
0 7 0 0
0 0 5 0
0 0 0 3
Patrick
On Wed, 26 Feb 2014, km wrote:
(*0 1 =@i.@#) 1 2 3
1 0 0
0 2 0
0 0 3
--Kip Murray
Sent from my iPad
On Feb 26, 2014, at 9:35 PM, Roger Hui rogerhui.can...@gmail.com wrote:
diag=: 3 :
and a thicker line:
'pensize 4; color red' plot ...
On Fri, 14 Feb 2014, Joe Bogner wrote:
Thanks! That did it
On Fri, Feb 14, 2014 at 11:34 AM, Jan-Pieter Jacobs
janpieter.jac...@gmail.com wrote:
Same thought here!
try 'color red' plot
Jan-Pieter
2014-02-14 17:32 GMT+01:00 Joe
Great! Lapack now runs on my MacBook Pro under j64-801 qtide.
So I can start using j801 for everything. The only problem I
see is that the menu displaying the list of routines fails:
docs_jlapack_ shows a window with a list of the lap files.
)
labs_run_jqtide_ 0
── (10 of 22) LAPACK (ctd)
How do you enter ` (tie) to make a
gerund on an iPhone? It doesn't
seem to be on the keyboard.
Patrick
--
For information about J forums see http://www.jsoftware.com/forums.htm
with the iPad. For now you'll have to cut/paste or define a
name and use the name. Eventually I guess we could kludge the use of
one of the monetary symbols on the keyboard.
Are there other missing keys? Does a google search show anything?
On Wed, Jun 26, 2013 at 11:37 AM, J. Patrick Harrington
j
I continue to be surprised by the ability
of J on the iPhone to run rather substantial
programs. I have a J version of a program to
compute photoionization models of planetary
nebulae. It has a main section of 500 lines
or so and calls about 30 other verbs and data
sets. One of these (2D grids
Eric,
I just tried this method with the corrected isox.ijs, and it does
work for me, running j701 on the laptop. Nice.
Patrick
On Tue, 11 Jun 2013, Eric Iverson wrote:
There was a serious typo in the last message for updating J iOS.
The
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