approachable
tutorial.
- Original Message -
From: Henry Rich
To: programm...@jsoftware.com
Cc:
Sent: Sunday, September 7, 2014 11:07 AM
Subject: Re: [Jprogramming] J Kernel
J By Example is interesting, but I think you should remove the K, which
will only be confusing. But it's no
I was intrigued by Ian's comment about adding a list of coding task
examples, but like Henry, was not inspired by the python.org
SimplePrograms. My inclination (and perhaps Ian's as well) is much more to
think in terms of rosettacode.org tasks. For me, a disappointing aspect of
the rosettacode.org
er 07, 2014 12:09 PM
To: Programming forum
Subject: Re: [Jprogramming] J Kernel
Note that the https://wiki.python.org/moin/SimplePrograms examples do not
actually work.
It's not that they are incorrect - it's that they assume various things about
the environment which a beginner has to
Note that the https://wiki.python.org/moin/SimplePrograms examples do
not actually work.
It's not that they are incorrect - it's that they assume various
things about the environment which a beginner has to overcome before
they can run them. (You need to install python, you need to know how
to get
om
Cc:
Sent: Sunday, September 7, 2014 5:35 AM
Subject: Re: [Jprogramming] J Kernel
Minimal Beginning J fills an important gap. One I had on my list to fill
urgently -- but Devon's got there first, with a surprisingly simple starter
set. Good Work, Devon!
Initially I was tempted to second
] J Kernel
Minimal Beginning J fills an important gap. One I had on my list to fill
urgently -- but Devon's got there first, with a surprisingly simple starter
set. Good Work, Devon!
Initially I was tempted to second-guess Devon by tweaking his list. Soon I
was convinced that if somebody
Minimal Beginning J fills an important gap. One I had on my list to fill
urgently -- but Devon's got there first, with a surprisingly simple starter
set. Good Work, Devon!
Initially I was tempted to second-guess Devon by tweaking his list. Soon I
was convinced that if somebody could improve upon i
Nice work, Devon.
One of the things I would like to do eventually is a sort of "J for
Matlab/R programmers." I figure J is vastly more useful as a general
purpose language than these, but it is also first rate for all kinds of
numerics and mathematical applications. There is a large population
Fair enough- I was just entering comments from my perspective-
Don Kelly
On 02/09/2014 8:14 PM, Devon McCormick wrote:
Not to be curt, but I put this page under my name because it's my own view
of the most basic parts of J.
Everyone is welcome to do the same. Please do so and feel free to inclu
Not to be curt, but I put this page under my name because it's my own view
of the most basic parts of J.
Everyone is welcome to do the same. Please do so and feel free to include
links to and from this page and others. You may wish to link to your own
minimal set at the bottom of the relevant s
Some beginners do have math beyond +.-.*.%.
If one knows what a logarithm is, and the assumption behind**monadic*^.*
is the natural log-then why not*^* as it is related?
Just put ^1 is 2.71828
If they don't know, then they are may not be interested in logarithms
-certainly not for multipl
Henry - I intend to link it into the beginner resources once I've settled
on how it should look.
Alex - I left out monadic ^ for lack of a good word. I'm not sure that
"Exp(x)" or "exponentiation" is worth the clutter.
On Tue, Sep 2, 2014 at 6:44 PM, Alex Giannakopoulos wrote:
> Just a teeny
Just a teeny thing, but if you are going to have both the monadic and the
dyadic definitions for ^. then shouldn't you have the same for ^ ?
Less confusion that way, plus a better insight into the way J uses dyads.
On 2 September 2014 22:14, Henry Rich wrote:
> What I meant was, arrange so G
What I meant was, arrange so Getting Started and NuVoc point to your
page. Beginners should be able to make their way to one of those pages.
Henry Rich
On 9/2/2014 4:47 PM, Henry Rich wrote:
Please link NuVoc, and Getting Started, to this.
Henry Rich
On 9/2/2014 12:36 PM, Skip Cave wrote:
Please link NuVoc, and Getting Started, to this.
Henry Rich
On 9/2/2014 12:36 PM, Skip Cave wrote:
Devon, nice job of putting together a reduced set of primitives for rhe
beginner. The only issue I see is the name. As a beginner, I would never
think to find a set of most-commonly-used primitive
Nice work Devon,
I think that I would go with your instincts and leave } out, since it is
considerably more complicated than the other parts of speech that you have
included. It would complete the pair in a typographic sense, but I don't think
that is a strong argument to include it. It also is
Yes - in R, negative indexes remove the item with that (positive) index,
e.g. from this R session (where ">" is the input prompt):
> vv<-(1:5);
> vv
[1] 1 2 3 4 5
> vv[-3];
[1] 1 2 4 5
> vv[c(-2,-5)];
[1] 1 3 4
On Tue, Sep 2, 2014 at 3:23 PM, Vijay Lulla wrote:
> Yes, that's what I meant. Tr
Yes, that's what I meant. Try selecting first and last n rows from data
frame. Actually R's indexing ([) is very lax and can trump people (at least
it has me) in strange ways. http://adv-r.had.co.nz/Subsetting.html How
about subsetting with floats? J raises 'domain error'...R
does...Numeric values
I think he means this by "mixing +ve and -ve":
0 1 _2 _1 { i.10
0 1 8 9
On Tue, Sep 2, 2014 at 2:50 PM, Joe Bogner wrote:
> I also use { extensively (dyadic). I appreciate the challenge of
> coming up with a minimal list. One criteria may be: can it be done
> relatively easily with one of th
I thought of including { and probably will. The only thing that deterred
me was thinking that I probably should also include } as well, to be
complete, and this is a little more complex.
On Tue, Sep 2, 2014 at 2:39 PM, Vijay Lulla wrote:
> Just out of curiosity, why is { not included? I use i
I also use { extensively (dyadic). I appreciate the challenge of
coming up with a minimal list. One criteria may be: can it be done
relatively easily with one of the other operations?
For {, it's fairly easy to use {. and }
For example: {. 3 }. 0 1 2 3 4 5
With a trivial case, the performanc
Just out of curiosity, why is { not included? I use it extensively for my J
explorations. Also, it is much more regular and useful(flexible?) than
indexing in other languages. For e.g., You cannot mix +ve and -ve indexes
in R but it works as expected (at least for me) in J. Regardless, nice work.
Based on Skip's suggestion, this page is now here -
http://www.jsoftware.com/jwiki/DevonMcCormick/MinimalBeginningJ - and is
titled "Minimal J for Beginners".
On Tue, Sep 2, 2014 at 1:10 PM, Devon McCormick wrote:
> Good point - I picked up the "J Kernel" label from the discussion.
>
>
> On Tu
Good point - I picked up the "J Kernel" label from the discussion.
On Tue, Sep 2, 2014 at 12:36 PM, Skip Cave wrote:
> Devon, nice job of putting together a reduced set of primitives for rhe
> beginner. The only issue I see is the name. As a beginner, I would never
> think to find a set of most
Devon, nice job of putting together a reduced set of primitives for rhe
beginner. The only issue I see is the name. As a beginner, I would never
think to find a set of most-commonly-used primitives under the name "J
Kernel" That actually sounds like a discussion of the internals of J, which
is what
Based on some feedback from Greg Borota last year on his experiences
learning J, I've put together a page on the J Wiki -
http://www.jsoftware.com/jwiki/DevonMcCormick/JKernel - that has a few
selected things from J on which a beginner can concentrate to avoid being
overwhelmed by the language in f
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