Tried to use the lab Fast Fourier Transform but the first simple example
already crashed:
fftw i.8
|domain error: cd
| 0 pick cmd cd(#shape);shape;in;out;dir;flag
both in J801 end J602.
What is the status of the addon math/fftw ?
R.E. Boss
(Add your info to http://www.jsoftware.com/j
Please give a detail bug report such as:
What are your running environment, such as OS, 32/64, version
numbers of base library and fftw addon, what errors being reported by
cder'' and cderx'', what is your DLL_jfftw_, do you have that
file in that location?
Ср, 29 янв 2014, R.E. Boss писал(а):
>
Windows 7 64
JVERSION
Engine: j701/2011-01-10/11:25
Library: 8.01.019
Qt IDE: 1.0.22/4.8.5
Platform: Win 64
Installer: j801 beta install
FFTW 1.1.8
cder''
1 0
cderx''
+---+-+
|122|The data area passed to a system call is too small. |
Thanks, now fixed, but now sure why the server did not response.
May be you can try pacman update later.
Ср, 29 янв 2014, R.E. Boss писал(а):
> Windows 7 64
>
>JVERSION
> Engine: j701/2011-01-10/11:25
> Library: 8.01.019
> Qt IDE: 1.0.22/4.8.5
> Platform: Win 64
> Installer: j801 beta instal
In trying to run the fftw-lab (and other labs) I got
error in: labsel_ok_button
smact: command not found: wd
(wd::(_)'qer') (13!:8)3
with
cder''
2 0
cderx''
+--+--+
|18|There are no more files. |
+--+--+
But I could proceed with the lab
Thanks for report. Now fixed.
smact needs jqt update.
Ср, 29 янв 2014, R.E. Boss писал(а):
> In trying to run the fftw-lab (and other labs) I got
>
> error in: labsel_ok_button
> smact: command not found: wd
> (wd::(_)'qer') (13!:8)3
>
> with
>cder''
> 2 0
>cderx''
> +--+--
With all of the mathematicians on this list, these functions have likely been
implemented before in J.
elyptic curve point add, multiplication and double
a python reference implementation:
https://github.com/warner/python-ecdsa/blob/master/ecdsa/ellipticcurve.py
the functions are: __add__ __
Here is the first invmod method
invmod=: 4 : 0
NB. inverse of y mod x (x|y)
NB. uc vc ud vd d c where d c init as x y
NB. q =. d<.@%c -- (4&{ <.@%~ {:)
a=. imw^:_ ] 1x,0x,0x,1x,x,y
if. 1~: 4{a do. 0 return. end.
if.0< 2{ a do. 2{ a else. x+2{a end.
)
imw =: ((2&{ - {. * 4&{ <.@% {:),(3&{ - 1&{
Some elliptic curve stuff; I think there is a +1 error that Roger Hui
noticed in the factorization method.
http://archive.vector.org.uk/art10007270
http://archive.vector.org.uk/art10007280
Best, Cliff
On 1/29/2014 11:35 AM, Pascal Jasmin wrote:
With all of the mathematicians on this list, th
thank you,
some exploration/toy code for eliptic curves:
CurvePoints =: 4 : 0"1 0
'p a b' =. x
p | %: (b + ^&3 + a&*) y
)
intCurvePointsX =: (] #~ CurvePoints = <.@CurvePoints)
intCurvePointsY =: ([ CurvePoints intCurvePointsX)
NB. x is prime, a, b defining curve: y^2 = x^3 +ax + b mod prime
N
For modular inverses in teaching I use
gcd2x=: 3 : 0
'r0 r1'=.y
's0 s1'=.1 0
't0 t1'=.0 1
while. r1 ~: 0 do.
q=. <. r0 % r1
'r0 r1'=. r1,r0-q*r1
's0 s1'=. s1,s0-q*s1
't0 t1'=. t1,t0-q*t1
end.
r0,s0,t0
)
invmod=: 4 : 'y| {: gcd2x y,x'
5 invmod 21
17
21|5*17
1
Best, Cliff
On 1/29
Is there a way to set the rank of the resulting verb of a conjunction? A bit
surprisingly, this workaround does not work:
t=: 2 : '(u@:v)"1'
] t+/ 3 3 $ i.9
9 12 15
result desired:
]@:+/"1 ] 3 3 $ i.9
3 12 21
Ideally, it should be possible to set rank like:
t =: 2 : 0 ("1)
...
)
I g
You forgot to bracket +/
On Jan 30, 2014 9:09 AM, "Pascal Jasmin" wrote:
> Is there a way to set the rank of the resulting verb of a conjunction? A
> bit surprisingly, this workaround does not work:
>
> t=: 2 : '(u@:v)"1'
>
>
>] t+/ 3 3 $ i.9
> 9 12 15
>
> result desired:
>]@:+/"1 ] 3 3
Interesting that your code for ec add mult and double is part of J's source
code for what I think is optimizations for q: or general factoring.
https://github.com/tavmem/j/blob/master/v2.c
- Original Message -
From: Cliff Reiter
To: programm...@jsoftware.com
Cc:
Sent: Wednesday, Ja
Seconded - try ] t (+/)
Thanks,
--
Raul
On Wed, Jan 29, 2014 at 8:21 PM, bill lam wrote:
> You forgot to bracket +/
> On Jan 30, 2014 9:09 AM, "Pascal Jasmin" wrote:
>
>> Is there a way to set the rank of the resulting verb of a conjunction? A
>> bit surprisingly, this workaround does not wo
Shared objects (.so files) have been removed from JAL addons for
Linux, in particular FFTW and LAPACK addons. Addons for Linux
will instead use libraries provided by Linux distro. Please
install the packages needed from distro if those addons fail
because of missing dependency.
arc/zip is un-affe
t2=: 13 :'+/|:y'
t2
[: +/ |:
t2 3 3$i.9
3 12 21
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Raul Miller
Sent: Wednesday, January 29, 2014 8:46 PM
To: Programming forum
Subject: R
I always preferred this to the vocabulary definition of @:
f=: 13 :'*/ x + y'
x f y
2016
f
[: */ +
It seems to me that J does too.
Linda
-Original Message-
From: programming-boun...@forums.jsoftware.com
[mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Linda
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