Has anyone considered an application to calculate with systems of
units, such as SI? I understand that it would be difficult to include
in the primitives, but as an application it would be extremely useful
a lot of the time. It would attract a lot of users. MathCad is a good
example, but MathCad is
> Has anyone considered an application to calculate with systems of
> units, such as SI?
I know you asked the question in the J Forum and you expect solutions in J,
which I cannot provide. But a few years ago I bookmarked this link:
http://futureboy.homeip.net/frinkdocs/
The program is good and it
On 10/24/07, Frank Hamilton <[EMAIL PROTECTED]> wrote:
> Has anyone considered an application to calculate with systems of
> units, such as SI?
Here's an attempt at tracking dimensions:
units=:3 :0"0&;:
assert._1-:nc y ['new unit name must have no other meaning'
L1=. 'assert.0=#$0+n [''unit e
I'm wanting to produce screen graphics (e.g. contour plots)
and also equivalent high-quality output files to include in
documents & posters that are typically produced using pdfLaTeX.
NB. it's easy to produce TeX text separately and overlay it on the plot.
Unfortunately, files created by plot etc
Mr. Shaw -
you can save arbitrarily large plots by specifying (width height) when
saving as a bitmap, e.g.
pd 'save bmp \amisc\bigpic.bmp 2000 2000'
(you do have to "pd 'show'" before saving as I just discovered.)
The EMF format seems to work in J6.01 for the simple test I just did. This
allo
At APL2007, from which I just returned, Guy Steele spoke about a language
called "Fortress",
on which they're working at Sun, that allows numbers to be specified with
units attached to them.
Of course this doesn't help you in J - and probably not for some time even
in that language as it's
still un
It occurs to me that sometimes you might need to multiply or
divide by dimensionless constants.
dimensionless=:1 :0
'';m;i.0
)
Example use
10 dimensionless *uni 3 m 2
You might want to pick a shorter name.
I did not support ^ but you could work around that for
the easy cases using an expre
[This is a belated follow-up to posts by Bill Harris & Mike Day, Aug 30th &
31st]
I think Mike Day's probably right in recommending following up links between J,
R & BUGS.
Note also the recently published (August 2007) paperback "Bayesian Computation
with R"
by Jim Albert - but beware of mis
Also,
(-"(1 1)<./)m
On 10/23/07, Raul Miller <[EMAIL PROTECTED]> wrote:
>
> On 10/23/07, Arie Groeneveld <[EMAIL PROTECTED]> wrote:
> > But I needed the same for columns. I didn't found it
> > in the J-house, but may be I overlooked it :-)
>
>(-"1 <./)m
> is equivalent to (-<./"1)&.|:
>
> -
I thought of something.
The first step is to perform all arithmetic functions given units, the
second is to convert from one unit to another.
So first, take 24 gm results from 4 m3 times 6 gm/m3
24 1 0 0 =4 0 3 0 * u 6 1 _3 0
The first number (24 4 6) in each list is a dimensionless multiplier,
Many thanks. I can convert the BMP files to PNG using Paint Shop Pro,
so (space willing) it's a good alternative to producing PNG directly,
though I'd still prefer some form of vector graphics format.
The EMF files produced by plot still look low resolution (e.g. dashed lines
have individual segm
On 10/24/07, Devon McCormick <[EMAIL PROTECTED]> wrote:
> Also,
> (-"(1 1)<./)m
-"1 b. 0
1 1 1
-"(1 1) b. 0
1 1 1
--
Raul
--
For information about J forums see http://www.jsoftware.com/forums.htm
Here's an updated instance of that code -- this time dealing with
subtraction (thanks to Dan Bron).
Note also that perhaps I should instead just define replacement
operators for + - * % but this approach works:
units=:3 :0"0&;:
assert._1-:nc y ['new unit name must have no other meaning'
L1=. 'a
> Date: Wed, 24 Oct 2007 09:14:37 +0200
> From: "Frank Hamilton" <[EMAIL PROTECTED]>
> Subject: [Jprogramming] units dimensions (gm,gm,s)
>
> Has anyone considered an application to calculate with systems of
> units, such as SI? I understand that it would be difficult to include
> in the primitive
Can someone explain whether:
6!:0 "0<''
|rank error
| 6!:0"0<''
is an accident, or on purpose? Why would the function depend on its
argument?
--
|\/| Randy A MacDonald | APL: If you can say it, it's done
6!:0 "0 ''
NB. blank display
6!:0 "1 ''
2007 10 24 21 24 44.715
2007/10/24, Randy MacDonald <[EMAIL PROTECTED]>:
>
> Can someone explain whether:
>
>6!:0 "0<''
> |rank error
> | 6!:0"0<''
>is an accident, or on purpose? Why would the function depend on its
> argument?
>
> -
On 10/24/07, Randy MacDonald <[EMAIL PROTECTED]> wrote:
> Why would the function depend on its argument?
To provide room for potential future enhancements.
--
Raul
--
For information about J forums see http://www.jsoftware.com/f
On 10/24/07, neville holmes <[EMAIL PROTECTED]> wrote:
> would inform design of such extension and because
> there are many traps in SI units (see, for example,
> ftp://ftp.comp.utas.edu.au/pub/nholmes/ca/nmrdys.pdf).
When I try and read this document, the adobe reader
asserts "Cannot extract the
The argument of 6!:0 is required to be an empty vector
and <'' is not an empty vector.
- Original Message -
From: Randy MacDonald <[EMAIL PROTECTED]>
Date: Wednesday, October 24, 2007 14:18
Subject: [Jprogramming] Current time: behaviour
To: Programming forum
> Can someone explain whe
Could it be clarified what is needed
- high resolution bitmap graphics (BMP, not EPS) OR
- vector graphics (EPS or PDF) with fine lines
? And what exactly is jaggedness?
For the fine vector graphics for example, in the Demo page
Studio|Demos|plot|2D-LinePatterns set
pd 'pensize 0.001'
then sav
Gosi wrote:
> 6!:0 "0 ''
>
> NB. blank display
Just to be clear, this behavior is unrelated to 6!:0 specifically.
It is exhibited by all f"0 y where 0 e. $ y (whether the "0 is, to borrow
a phrase, express or implied). Basically you're asking to operate on all the
scalars of a
I wrote:
> It is exhibited by all f"0 y where 0 e. $ y (whether the "0 is, to
> borrow a phrase,
> express or implied). Basically you're asking to operate on all the scalars
> of an array
> which contains no scalars.
For completeness, I guess I should note that 0 is not a special
I wrote:
> Further, the display, while empty, can can be
> arbitrarily tall and wide, depending on the rank
> of(f"0) 0 .
I should have written:
Further, the display, while empty, can be
arbitrarily tall and wide, depending on
the shape of f"0 {.,y .
That is, the size of t
> Date: Wed, 24 Oct 2007 17:41:21 -0400
> From: "Raul Miller" <[EMAIL PROTECTED]>
> Subject: Re: [Jprogramming] units dimensions (gm,gm,s)
> To: "Programming forum"
>
> On 10/24/07, neville holmes <[EMAIL PROTECTED]> wrote:
> > would inform design of such extension and because
> > there are many
I had the same problem but when I changed the suffix to ".ps" it loaded fine
in
Ghostscript (postscript reader).
On 10/24/07, neville holmes <[EMAIL PROTECTED]> wrote:
>
> > Date: Wed, 24 Oct 2007 17:41:21 -0400
> > From: "Raul Miller" <[EMAIL PROTECTED]>
> > Subject: Re: [Jprogramming] units dime
Sorry. That last email should have had the above
subject rather than
Re: Programming Digest, Vol 25, Issue 46
Neville Holmes, P.O.Box 404, Mowbray 7248, Tasmania
Normal e-mail: [EMAIL PROTECTED]
Sick of deleting your inbox? Yahoo!7 Mail has free unlimited storage.
http://au.docs.yahoo.
On 10/24/07, Devon McCormick <[EMAIL PROTECTED]> wrote:
> I had the same problem but when I changed the suffix to ".ps" it loaded fine
> in Ghostscript (postscript reader).
I downloaded a fresh copy a few minutes ago, on a different machine,
and it worked fine. The machine where it worked was usi
On 10/24/07, Raul Miller <[EMAIL PROTECTED]> wrote:
> I downloaded a fresh copy a few minutes ago, on a different machine,
> and it worked fine. The machine where it worked was using adobe
> reader 7.0.8. The machine where it did not work was using adobe
> reader 8.0.0. Assuming the file was the
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