works in J7 too
(152{a.)~
0 1 2
3 4 5
6 7 8
- Original Message -
From: Raul Miller
To: Programming forum
Cc:
Sent: Friday, September 12, 2014 10:09 PM
Subject: Re: [Jprogramming] wait, what?
I was using jqt 802 on desktop.
FYI,
--
Raul
On Fri, Sep 12, 2014 at 9:09 PM, bill la
I got it to work! In under 5 minutes it creates R with 300 items that is
then decoded into S and reproduces the original image. It's chances of
doing that by chance is about 1 in 1.5 trillion.
load 'viewmat'
GRB256=:1 0 2({"1) 256 256 256#:i.256^3
Q=:?(300 300)$ 16777216x
R=:16777216 #. Q
S=:(
Thanks for the report. It seems android got a bug that it should raise
error for indirect assignment to an illegal utf8 name. (152{a.)
On Sep 13, 2014 10:27 AM, "Raul Miller" wrote:
> I get an ill-formed name error.
>
> Thanks,
>
> --
> Raul
>
> On Fri, Sep 12, 2014 at 10:25 PM, bill lam wrote:
Looking for other examples:
(128}.i.65536)#~_2 wrote:
> May be you can try this,
>u:955
> λ
>(a=.utf8 u:955)=. i.2 3
>a
> λ
>a~
> 0 1 2
> 3 4 5
>λ
> 0 1 2
> 3 4 5
>λ * 2
> 0 2 4
> 6 8 10
>
> I cannot type lambda, the lambda was copied from the output in j session.
> Tes
I get an ill-formed name error.
Thanks,
--
Raul
On Fri, Sep 12, 2014 at 10:25 PM, bill lam wrote:
> May be you can try this,
>u:955
> λ
>(a=.utf8 u:955)=. i.2 3
>a
> λ
>a~
> 0 1 2
> 3 4 5
>λ
> 0 1 2
> 3 4 5
>λ * 2
> 0 2 4
> 6 8 10
>
> I cannot type lambda, the lambda w
May be you can try this,
u:955
λ
(a=.utf8 u:955)=. i.2 3
a
λ
a~
0 1 2
3 4 5
λ
0 1 2
3 4 5
λ * 2
0 2 4
6 8 10
I cannot type lambda, the lambda was copied from the output in j session.
Tested on android only.
On Sep 13, 2014 10:11 AM, "Don Guinn" wrote:
> Well it defined it in W
Oh yes! This was in JQT 802.
On Fri, Sep 12, 2014 at 8:09 PM, Raul Miller wrote:
> I was using jqt 802 on desktop.
>
> FYI,
>
> --
> Raul
>
>
> On Fri, Sep 12, 2014 at 9:09 PM, bill lam wrote:
> > J implementation only allows 7 bit ascii alphabets for name. This is
> > relaxed in the unofficial
Well it defined it in Windows 7 version of J, but couldn't access it.
(152{a.)=: i.3 3
(152{a.)
�
names 0
aspect filler filter_size g gussian kernel_size
m n r2 rho zks �
�
|spelling error
| �
| ^
It showed up as a b
I was using jqt 802 on desktop.
FYI,
--
Raul
On Fri, Sep 12, 2014 at 9:09 PM, bill lam wrote:
> J implementation only allows 7 bit ascii alphabets for name. This is
> relaxed in the unofficial android jqt.
>
>(a=.152{a.)=. i.3 3
>a~
> 0 1 2
> 3 4 5
> 6 7 8
>水=.i. 2 2
>水
> 0 1
Here's what I notice:
In your first example, the largest possible value in Q was 9, and you
referred to GRB256 even though you had not yet defined it.
In your second example, the largest possible value in Q was greater than 999.
Inspecting samples of the data (try 3 3 {.Q and 3 3 {. S) should ma
J implementation only allows 7 bit ascii alphabets for name. This is
relaxed in the unofficial android jqt.
(a=.152{a.)=. i.3 3
a~
0 1 2
3 4 5
6 7 8
水=.i. 2 2
水
0 1
2 3
йцфы=.i.3 3
йцфы
0 1 2
3 4 5
6 7 8
On Sep 13, 2014 8:38 AM, "Raul Miller" wrote:
> Apparently this is legal
Linda
10 #. Q will convert a list of decimal digits to a number
http://www.jsoftware.com/jwiki/Vocabulary/numberdot#dyadic
Q in your second example is a list kf numbers of varying digits. Is your
goal to combine them like your first usage? If so, I dont think it will
work since the numbers have
Apparently this is legal:
(152{a.)=: i.3 3
I was surprised.
--
Raul
--
For information about J forums see http://www.jsoftware.com/forums.htm
This is the real problem I'm working on. Here's what works.
load 'viewmat'
GRB=:1 0 2{"1 ( #:i.8){0 255
p=: 13 :'?.(y,y)$y'
]Q=:p 10
]R=:10 #. Q
]S=:(10$10)#:R
Q-:S
GRB256 viewmat Q;'Q'
GRB256 viewmat S;'S'
Q is a random array of data which has a corresponding color image.The da
Here's a few examples that relate to how I think of A. ...
(i.6) A. i.3
0 1 2
0 2 1
1 0 2
1 2 0
2 0 1
2 1 0
The number of permutations is the factorial of the number of items
being permuted.
(0,~.!i.6) A. i.6
0 1 2 3 4 5
0 1 2 3 5 4
0 1 2 4 3 5
0 1 3 2 4 5
0 2 1 3 4 5
1 0 2 3 4 5
Permutat
Brian Schott wrote:
> 1 A. b transposes the last two items of b
A. is really cool. The problem with using it is coming up with the correct
left-hand argument (code) for the permutation you want. A few special ones
are easy to remember (particularly 0 for "do nothing", _1 for "reverse",
and 1 for
Yes it is column-major order. To supplement Chris's point:
http://www.mathworks.com/help/matlab/math/multidimensional-arrays.html
On Fri, Sep 12, 2014 at 12:33 PM, Roger Hui
wrote:
> > For example, if an array has shape 2 3 4, then Matlab treats this as 4
> > matrices, each 2x3, while J treats i
Linda, thanks. This would be a good addition to add to the wiki as
art. See
http://jsoftware.2058.n7.nabble.com/Replace-one-item-of-a-list-tt63230.html#a63317
for reference
On Fri, Sep 12, 2014 at 11:27 AM, Linda Alvord wrote:
> Install J. Start J. Copy and paste code into a jqt new temp. Run
> For example, if an array has shape 2 3 4, then Matlab treats this as 4
> matrices, each 2x3, while J treats it as 2 matrices, each 3x4.
This leads me to the conjecture that Matlab stores arrays in column-major
order, like FORTRAN. J and APL stores arrays in row-major order.
On Fri, Sep 12,
Thanks very much, Dan, and thanks for the advice on verb swap. I renamed
clear to clstk.
--Kip
On Friday, September 12, 2014, Dan Bron wrote:
> Kip,
>
> The adverb is what you think it is, except you need to use a little trick
> to workaround some limitations in the interpreter. Thus:
>
>
>
Matlab has a different notion of multidimensional array than J.
For example, if an array has shape 2 3 4, then Matlab treats this as 4
matrices, each 2x3, while J treats it as 2 matrices, each 3x4.
I don't think it helps to try to enforce Matlab thinking on J.
Also, you should try to set up data
Dan,
Your swapping note is an eye opener for me. (I also appreciated your answer
regarding the RPN calculator.
The following link suggests one particular swap using A. that might be
handy, also. "1 A. b transposes the last two items of b,"
http://jsoftware.com/help/dictionary/dacapdot.htm
On F
Install J. Start J. Copy and paste code into a jqt new temp. Run code.
load 'viewmat'
GRB256=:1 0 2({"1) 256 256 256#:i.256^3
Q=:?(1000 1000)$ 16777216x
GRB256 viewmat Q;'Q'
1000*1000*256x^3
Here's the result in the terminal:
load 'viewmat'
GRB256=:1 0 2({"1) 256 256 256#:i.256^3
Thank you all for your responses. I think I found a solution that helps me
get the shape of the result I expect by specifying at the beginning of the
J sentence the shape of the result I want. For example, if I want to add
the columns of the expression below and I expect a 2 by 1 vector as a
result
Kip wrote:
> NB. swap?
Oh, I meant to mention, the most fun way to swap things in J is using C. :
(<0 1) C. 'AbCdEfGhI'
bACdEfGhI
(<4 5) C. 'AbCdEfGhI'
AbCdfEGhI
-Dan
--
For information
Kip,
The adverb is what you think it is, except you need to use a little trick
to workaround some limitations in the interpreter. Thus:
op1Arg =: adverb def 'y],.STACK =: (_1 }. STACK), u _1 {. STACK'
op2Arg =: adverb def 'y],.STACK =: ( _2 }. STACK), u/ _2 {. STACK'
I'm proud of the Reverse Polish Notation calculator shown below (think HP
50g in rpn mode). My question is, can you devise an adverb monad so that
sqrt =: %: monad
produces the sqrt verb below?
Examples
clear'' NB. Initialize global vector STACK
5 2 enter''
5
2
1 dup''
5
2
2
tim
small bug --
I had
out =. (# arr) # 0
when it should have been
out =. (# y) # 0
fixed:
MAXBITLEN =: 15
makeFromLengths =: 3 : 0
NB. 1) Count the number of codes for each code length
'bll blct' =: |: ({.,#)/.~ /:~ y
NB. 2) Find the numerical value of the smallest code for each code length:
bl
bill, here is a crude algorithm that seems to replicate the logic from
section 3.2.2
It also replicates the resultfrom the rfc in TEST1
MAXBITLEN =: 15
makeFromLengths =: 3 : 0
NB. 1) Count the number of codes for each code length
'bll blct' =: |: ({.,#)/.~ /:~ y
NB. 2) Find the numerical val
Pascal Jasmin:
> insertitem =: 1 : '(u"_ {. ]) , [ , u"_ }. ]'
> the adverb argument is a verb that tells which item position
> to insert. The verb argument is dyadic, but can be a constant
> verb. Add @:] to it to just use y as the argument
> 1 2: insertitem &.|: 3 3 $ 0
> 0 0 1 0
> 0 0
Your method seems sound, so I suspect (without other evidence) that M.
is not handling the large range of values that you need.
I suggest you write an adverb to replace M. in your sentence. Use a
hashtable to store the values as you find them.
Roger recently published an essay with a great m
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