It occurred to me yesterday, though I haven’t coded it, that you can work
through twice, first for the minimum suitable spanning box, and second for that
box extended one row up and down and one column left and right. The inner
regions are those whose size doesn’t change. Probably pretty ineffic
Thank Heavens Ken and Roger avoided all those APL glyphs
Mike
> On 14 Dec 2018, at 16:08, Raul Miller wrote:
>
> I think this might be at least partially a font issue.
>
> If I am reading your current message right, I probably read 5” as 5’’
>
> And, in the environment I am currently working
Well, we’ve been calling our times gmt and bst (British Summer T) throughout
membership of the EU, and that’s bound to continue; however, our
synchronisation with Europe on the changeover dates might change in the future,
perhaps.
Perhaps brexit should be a time-zone acronym, left as an exerc
... this thread popped up over breakfast, so to speak.
Playing with Roger’s solution, I noticed this variant which happens to solve a
more specialised requirement, to indicate doubletons only:
~:~:~:&.|.
as in
(~:~:~:&.|.)t
1 1 0 1 1 1 0 0 0 1 0
... so the 2, which occurs 3 times is not f
You often see this sort of thing, returning pairs of indices of all occurrences:
5 ($@] #.inv I.@,@:=) |: 1 2 3 4,. 2 3 4 5,. 5 4 3 2 ,. 2 3 5 4
1 3
2 0
3 2
You can obviously get the row indices using {:”1 or some such, and you can of
course make the bracketed code a named dyadic verb,
Cheer
Pascal Jasmin’s power verb looks neat, but I don’t think one pass does quite
what Brian’s foo does:
one pass of foo modifies x with bar1 before changing y with bar2 using the new
x.
eg,
x1 =. x bar1 y
y =. x1 bar2 y
x =. x
I _think_ (bar1 ; bar2 ) &>/ x0;y0
returns
(x0 bar1 y0); x
Not sure who Martin was (as mentioned below), I eventually found
https://code.jsoftware.com/wiki/Guides/Jupyter, contributed by "Martin
Saurer"
This is fine, but the download/jupyter link on that page refers to
zipped j805 packages,
with the Windows version apparently only available in 3
Occasionally I get this sort of thing happening. I've (usually?) used debug
earlier in the session for tracing through a verb or three:
Today:
load 'c:/d/j807/user/myscript.ijs'
|stack error: mpart
... so I try again, hoping it disappears (!)
load 'c:/d/j807/user/myscript.ijs'
|stack error: m
done anything wrong yet. It want to
> leave the stack for you to look at. It's a bit inelegant not to be able to
> execute any name at all, I admit. If going out of debug doesn't fix it, give
> me an example I can reproduce the problem with.
>
>
> Henry Rich
>
> are executed.
>>>
>>> If you are in debug, the system hasn't done anything wrong yet. It want to
>>> leave the stack for you to look at. It's a bit inelegant not to be able to
>>> execute any name at all, I admit. If going out of debug doesn&#x
Paolo has just beaten me to it, but I'll post this anyway.
b NB. shorter than a, just to avoid line-wrapping
1 10 100 1000 2 20 200 2000 3 30 300 3000
Monadic, with 4 and '000' embedded:
(,@:((' ',~_4{.'000',":)"0)) b
0001 0010 0100 1000 0002 0020 0200 2000 0003 0030 0300 3000
Dyad
Yes, of course it was x. !
M
Sent from my iPad
> On 5 Feb 2021, at 02:17, chris burke wrote:
>
> Thanks, fixed now.
>
> The code dates from the time when x. was the left argument.
>
> On Thu, Feb 4, 2021 at 4:00 PM 'Michael Day' via Programming
> wrote:
>>
>> Having a look at the scripts i
Assuming what I can now see is the latest version, line 174 still looks wrong:
if. coeffs=. -: '' do. '0&p.' return.
should be
if. coeffs -: '' do. '0&p.' return.
... but perhaps that’s already been done in another incarnation.
Cheers,
Mike
Sent from my iPad
> On 7 Feb 2021, at 15:18, chr
Thanks, Ric.
I think I’d prefer to continue offering public comments open to criticism and
correction in this and perhaps other forums/fora.
Cheers,
Mike
Sent from my iPad
> On 13 Feb 2021, at 23:20, Ric Sherlock wrote:
>
> Hi Mike,
> I've made the suggested change and pushed to GitHub
Oops!
Sent from my iPad
> On 18 Feb 2021, at 11:38, R.E. Boss wrote:
>
> In my first message (far below) I wrote:
>
I could only find it in \j64-602\addons\tables\csvedit
>
>
> R.E. Boss
>
>
> -Original Message-
> From: Programming On Behalf Of
> 'Michael Day' via Programm
Henry’s pointed out that 13 : ... has bugs. It’s very useful for quick
tacitisation, but
it’s always advisable to check the resulting verb.
Mike
Sent from my iPad
> On 15 Mar 2021, at 12:00, 'Bo Jacoby' via Programming
> wrote:
>
> Hi Bob
> Thank you very much!
> Bo.
>
>Den søndag den
OK...
here’s what I should have sent earlier:
1. The required number includes all nn = n raised to n for which n are
multiples of 3.
2. It also includes all nn for which n are already powers of 3
3. But we need to avoid double-counting nn for which both 1 & 2 apply.
So:
qprob =: 3 : 0
N =. y
... Skip’s t had a trailing zero, but you can’t take that as given, so need to
append in case the last entry is 1
Sent from my iPad
> On 30 Mar 2021, at 06:29, Raul Miller wrote:
>
> The ,0 is at the end because Skip specified that the list was zero
> delimited, and verbs of the form u;._2 ar
My variant:
j =. 1
'mevema' {~ 0 1 + +: j
ve
I use {~ quite often, possibly thanks to nostalgia for [i] !
Mike
Sent from my iPad
> On 13 Apr 2021, at 09:14, HH PackRat wrote:
>
> Hello, all!
>
> I'm stumped and need to know why the following "from" problem occurs
> and how to do wha
Sent from my iPad
> On 15 May 2021, at 04:13, HH PackRat wrote:
>
> Hello again!
>
> I'm thinking, for example, of a table of boxed data in its transposed
> horizontal position that has, say, 3 rows of, say, 1000 *boxed* values
> each. My goal is to amend *all* of the boxed values to their s
Sorry... another early send!
You’ve already had some helpful, constructive, replies. All I’ve got to add is
to wonder why you’re working with boxed data if your data are as regular as
your example suggests.
If you really do have m rows of n boxed numeric values, why not just open it
up w
That’s what I was thinking too, or even take all 3-digit numbers & insert,
pretend, append triples...
again, it’s better if you’re happy with quads etc.
Cheers,
Mike
Sent from my iPad
> On 4 Jul 2021, at 08:50, Jan-Pieter Jacobs wrote:
>
> Not using cut here, but I took a generative approa
... prepend ..., thanks to iPad spell correction!
M
Sent from my iPad
> On 4 Jul 2021, at 09:24, Mike Day wrote:
>
> That’s what I was thinking too, or even take all 3-digit numbers & insert,
> pretend, append triples...
> again, it’s better if you’re happy with quads etc.
>
> Cheers,
>
>
Here’s one implementation of what I’d suggested for construction from all
3-digit representations of 0-999, working in characters rather than numerals.
Staying in characters saves time and space, not shown here, compared to
evaluating the representations. Also, I’m pre-evaluating the 3-digit
=: (i.4) |. rtbl 0 1 , rtbl 1
> clean2 =: ~.@: #~ %~@i.&'0'"1
>
> and finally, check if everything worked out fine:
>
> (noi,6) -: $ clean2 d3a exp2 tripsa
>
>
>> Am 07.07.21 um 12:15 schrieb 'Mike Day' via Programming:
>> Here’s one
... or even <> a la APL!?
Mike
Sent from my iPad
> On 27 Jul 2021, at 02:18, Henry Rich wrote:
>
> I don't see much downside to implementing a sentence delimiter, except for a
> nagging feeling that the good Lord left that space for you to put commentary
> in.
>
> Take a moment to consider w
Except <> is a valid train, so would need special treatment.
I suppose the user could set a separator string or strings of their choice,
probably in a config file.
Cheers,
Mike
Sent from my iPad
> On 27 Jul 2021, at 09:48, Mike Day wrote:
>
> ... or even <> a la APL!?
> Mike
>
> Sent f
Nice work, especially persuading 13 : to return a tacit version.
I had reached the same solution as Pascal Jasmin’s, so not worth a comment in
itself.
However, it is just about worth pointing out that the filtering approach gets
expensive for larger values of y; eg 3 Smps 20 would entail fi
gt;> corrected variances of all samples is equal to the bessel corrected variance
>> of the population.
>>
>>E =. +/%# NB. mean
>>
>>Va =. E@:*:-*:@:E NB. Variance
>>
>>Bc =. -.&.:%@#*Va NB. Bessel corrected variance
>>
>>
NB. No history in this comment - side-effect of using iPad away from home WiFi
My farthingsworth:
Suppose you’ve got one canonical solution in the form of an array of m-hands
compatible (in some way) with one canonical n-hand. (Devon asked for all
5-hands given 1 (or 6 permutations of 1) 4-han
But are they all evaluated in one go, or are you already buffering the data,
as suggested by several correspondents? If the latter is the case, different
buffers might give rise to “different” values...
But we haven’t seen your data. Can you reproduce the apparent error on an
example that’
a 20160627.070001.177063283 0 0 18634 0:e4b700 18546 124.7
>> 6384 125 18546 124.7 7384 125
>>
>> TopOfBookDelta 20160627.070001.177063284 0 0 18634 0:e5e000 18546 124.7
>> 7384 125 18546 124.7 7474 125
>>
>> TopOfBookDelta 20160627.070001.177063285 0 0 18634
Sending to Beta AND Programming- sorry if wrong!
Just tried it, in Windows 10
Unfortunately, Jqt doesn’t start up.
Running J console’s batch file with an added (by me) pause line shows:
“ load library c:\\bin\j.dll failed. The specified module could not be
found. “
I can confirm tha
Yes, a good point.
As I said, I have a need for this facility occasionally, but not for
production code. Most of my programming is recreational problem-solving.
I think I used the block comment method a week or so ago in solving a numerical
Times Listener crossword, number 4673, 21 August
This rings a bell ... I think this might have been a problem with an early
beta, forget which version. Later correspondence shows you’re in release beta
901-a, so likely to have been buggy, perhaps.
Cheers,
Mike
Sent from my iPad
> On 14 Sep 2021, at 14:59, Jon Quant wrote:
>
> Dear all,
I’d noticed the unmatched bracket, thought it was deliberate, so didn’t
comment. Sorry, could have saved you some time!
Mike
Sent from my iPad
> On 16 Sep 2021, at 14:07, R.E. Boss wrote:
>
> OK. I see the mistake I made, left paren was missing, so J gave a length
> error on 0 0 0 1,: _ _ d
Similar approach, essentially, to Ric’s, using a table of indices of the
ones:
ix =: $#:I.@,
ix map
0 0
0 3
1 1
1 2
({&m@:{."1)ix map
aabb
({&m@:{."1,. {&n@:{:"1)ix map
aA
aD
bB
bC
Somehow, though, I think you’re after something more elegant.
Sorry, the display is probably poor a
FWIW, I compared my suggestion (based on I. on the ravel) with Igor’s on a
3000x4000 Boolean, with about 3% ones. Igor’s was far better, in space and
time.
Might be different given a different starting point, such as a sparse matrix,
or index array, either/both of which Bill says he’s us
Also, there’s been correspondence in this forum over the years since Sudokus
emerged around ‘05. Many solutions were discussed. Roger Hui presented
elegant compact solvers; John Scholes produced a nice one using “direct
definition” in Dyalog APL, I forget where it’s published. My own is ty
Sorting the result suggests this amendment to save one transpose:
shist =:|:@(/:~@~.,.#/.~)
Cheers,
Mike
Sent from my iPad
> On 19 Oct 2021, at 13:00, Raul Miller wrote:
>
> ~. and #/.~ maintain the order of their argument.
>
> So this is one approach:
>
> hist=: ~. ,: #/.~
> n=:?100#
I was evolving a halfway decent approach, but yours is far, far better.
Pace J-P Jacobs, he seems to have missed your amendment; perhaps the messages
passed each other by like ships in the night...
Anyway, the ] may be dropped, at the expense of a couple of brackets:
foo =: /:(,.~3|3+*
!
Sent from my iPad
> On 22 Oct 2021, at 13:54, Ben Gorte wrote:
>
> Ha!
>
>
> (\:%) i:10
>
> 0 1 2 3 4 5 6 7 8 9 10 _10 _9 _8 _7 _6 _5 _4 _3 _2 _1
>
>
>> On Fri, 22 Oct 2021 at 20:14, R.E. Boss wrote:
>>
>> Some time ago I stumbled on an elegant solution to sort a sequence of
>> numbers
I’m almost sure you already know this idiom:
]x=. 0 4 5 e.~ i.3 3
1 0 0
0 1 1
0 0 0
where =: $#:I.@,
where x
0 0
1 1
1 2
... and you know that I.x is filling in zeros in rows 0 & 2 to match the length
of row 1,
so I’ve probably missed the point!
Sadly, Roger isn’t around to explain w
Fair point. Apologies
M
Sent from my iPad
> On 25 Oct 2021, at 13:09, Marshall Lochbaum wrote:
>
> ($#:I.@,) 0 0 1 1
--
For information about J forums see http://www.jsoftware.com/forums.htm
Devon, in your initial msg, you mentioned
“Anyway, for really simple things I do in emacs, like recalling the previous
command...”
You probably mean something else entirely, but just in case it helps, the hot
key combination ctrl-shift-up arrow goes back up previous commands;
ctrl-shift-do
>
> On Wed, Nov 3, 2021 at 10:51 AM 'Mike Day' via Programming <
> programm...@jsoftware.com> wrote:
>
>> Devon, in your initial msg, you mentioned
>> “Anyway, for really simple things I do in emacs, like recalling the
>> previous command...”
&
Also, surely the integer restriction is consistent with the “scientific
notation” that’s so pervasive in science and in computer languages.
Cheers,
Mike
Sent from my iPad
> On 8 Nov 2021, at 11:47, Raul Miller wrote:
>
> Conceptually, 2e3.4 would be 2 * 10^3.4 or approximately 5023.77
>
>
I’ve just remembered to check menu>tour>overview in jhs after updating the
addon. Yes, it launches without error.
In looking for a msg to reply to I found your (Eric’s) note nested below.
Sorry I’d overlooked it, but thanks all the same!
Seems fine in Avast - I think it’s a Chrome clone!
Yes, a 9x9 Boolean matrix with an offset 1s diagonal and an extra 1. It might
have been worth using the high-power squaring technique, if the power were
really large, but for 256 I just took the direct 256th power.
Cheers,
Mike
Sent from my iPad
> On 27 Dec 2021, at 06:17, Raul Miller wro
As I recall, a killer question until one realises there’s no need to preserve
the order; then it’s just a matter of maintaining counts, as you observe.
I’m currently wondering how to acquire the tera- or peta-bytes of storage to
deal with day 22 part 2. Part 1 is easy, of course. No spoilers,
>>
>> There must be a better way, but at least this slow-coach method didn't
>> need a super-computer!
>>
>> I might inspect the efficiency, but probably not - it's taken too long
>> to find a working solution!
>>
>> Looking forward to Rau
I’d forgotten that this day was also pretty hard. My “unpack” function (snap!)
also delivered the goods for both parts. It works through the message calling
either “literal” or “operator”. literal is self-contained, returning a value
and an unused message fragment, while operator calls unpack
though the initial set of 420 "ops"
>>> generated only ~ 43000 small objects.
>>> The space actually used appears fo be ~9GB:
>>>
>>> 7!:2@] 'reboot2 data'
>>>
>>> 8721760
>>>
>>>
>>> There
Sure. Sorry, excuse my phrasing; that’s what I meant but didn’t express
clearly!
Ciao,
Mike
Sent from my iPad
> On 10 Jan 2022, at 03:21, Pierpaolo Bernardi wrote:
>
>> Il giorno 9 gennaio 2022, alle ore 20:56, 'Michael Day' via Programming
>> ha scritto:
>>
>> Chat really, but I think
Well, I was using my right hand/ lh/ 2 fingers & thumb, a la Faraday, for
insight!
Didn’t help!
Mike
Sent from my iPad
> On 10 Jan 2022, at 04:54, Raul Miller wrote:
>
> I should perhaps clarify -- since there's no actual physical
> coordinates involved here. I am using "left handed" and "ri
Perhaps we’re not talking about the same thing. I was using this bit of the
problem description:
“By finding pairs of scanners that both see at least 12 of the same beacons,
you can assemble the entire map”
So for each scanner I found its inter-beacon distances, which are independent
of th
Part 1 was relatively easy, but I was annoyed that I couldn’t see how to
exploit its cyclic nature. Here’s a comment to self from my script:
“ m10 +/\"1}."1 |: 15 2 $+/|:30 3$die
4 6 6 4 10 4 6 6 4 10 4 6 6 4
3 4 3 10 5 8 9 8 5 10 3 4 3 10
NB. Players 1 2 score 60 65 respectively every 10
For Henry I expect: as I share code between J903 on the laptop and J701 on this
iPad, I’ve been avoiding the use of {{ }} objects. (My iPad can’t support
Ian’s new J902.)
But I was just wondering about adding a routine to the J701 start.ijs script to
parse a J903 script translating direct def
% #) y'
>>
>> But this would be useless for your purposes:
>>
>>mean=: {{ {{x + y}} {{u/}} {{x % y}} {{#y}} }}
>>5!:5<'mean'
>> 3 : '{{ x + y }} {{ u/ }} {{ x % y }} {{ #y }} '
>>
>> FYI,
>>
>>
Briefly for now, as the pub quiz went on far too long & it’s midnight...
I hope my hint wasn’t too much of a spoiler; unintended if it was.
My insight was somewhat mathematical, and is similar in a way to the Moebius
transform. I worked through a 2-d analogue looking at intersecting rectangles
this into a useful algorithm.
>
> Thanks,
>
> --
> Raul
>
> On Tue, Jan 11, 2022 at 7:42 PM 'Mike Day' via Programming
> wrote:
>>
>> Briefly for now, as the pub quiz went on far too long & it’s midnight...
>> I hope my hint wasn’t too much of a
I’ve just got going on this after throwing in the towel on 23.2, though I
haven’t yet persuaded myself to crib your post on that one!
It’s one of those days where Dyalog APL’s direct definitions, where alpha and
omega are the default arguments, would have saved renaming the registers to
upper
So I’d missed the 2-moves restriction, too. That significantly reduces the
possible number of states!
Cheers,
Mike
Sent from my iPad
> On 23 Jan 2022, at 19:10, Raul Miller wrote:
>
> On Sun, Jan 23, 2022 at 2:03 PM 'Michael Day' via Programming
> wrote:
>> Then I noticed: NB. I MISSED TH
Iirc, Wordle’s inventor was on the radio recently, bbc natch; he concurred
with the Mastermind attribution.
Mike
Sent from my iPad
> On 24 Jan 2022, at 14:59, Ian Clark wrote:
>
> Wordle strikes me as a variation of Mastermind / Cows & Bulls / Moo, using
> alpha instead of digits, or color
FWIW, I haven’t got into Wordle yet, although, by coincidence, neighbours
were chatting about it during yesterday morning’s rehearsal for the afternoon
concert!
Anyway, my “anag” APL workspace has become a J script with ~285000 words and
phrases, of which ~12700 are of 5 letters*. These i
Just about downloading ArrayFire for Windows 11...
I tried downloading the two exe files, one for W11, which failed, and then
W10, also a failure. The failures both reported inability to verify.
My son has just commented that it’s a common M/S feature... Anyone else seen
this behaviour?
Unfortunately, Pawel wants 2 f d to be 3 11. However, I find that 3 f d IS 3
11.
Other results are a bit strange, too:
4 f d
2 12
8 f d
|index error: f
| y({~,])x i.~+/\(i.@#~:i.~)y
I wasn’t going to post my effort, but it might interest Pawel. This version
works on the slightl
es. You will need to take some extra step to override the
> security check.
>
> On Wed, Jan 26, 2022 at 3:35 PM 'Mike Day' via Programming <
> programm...@jsoftware.com> wrote:
>
>> Just about downloading ArrayFire for Windows 11...
>>
>> I tried do
Perhaps I should point out that my verb, h (see below), uses a lot of space
for a large list, especially if there are few repeats, as it’s using an outer
product.
I later produced an even more verbose effort which runs in less space on a 10^6
long vector, but takes 3-4x the space & time o
vior like the previous version) or a list
> containing no indices (which gives an empty result).
>
> (Note also that if we were working with extremely long lists, and if
> the duplicates we were looking for were typically at the beginning of
> those long lists, it would be statistica
I did manage to install it eventually!
Other Windows users might wish to know that I found I needed to load J as an
administrator to avoid failure.
Thanks,
Mike
Sent from my iPad
> On 27 Jan 2022, at 21:07, Eric Iverson wrote:
>
> arrayfire addon updated
>
> * improved init
>
> * support
I’ve just updated the addon to Vn 2.1.6, and tried
load ‘~addons/math/arrayfire/arrayfire.ijs’
|value error: JAPP
| d=.toJ Freda. JAPP,’man.txt’
|[-56] c:\…\addons\…\arrayfire.ijs
This is in the latest J version,
j903/j64avx2/Windows
Release-b...28T04:09:50
Library: 9.03.08
...
I ran J
ain.
>
> On Fri, Jan 28, 2022 at 4:44 PM Eric Iverson
> wrote:
>
>> Sloppy release on my part. I will fix this in a few minutes.
>>
>>
>> On Fri, Jan 28, 2022 at 4:39 PM 'Mike Day' via Programming <
>> programm...@jsoftware.com&
Not a problem, just hoping for some enlightenment.
As Raul found, init_jaf_ worked with both ‘cpu’ and ‘opencl’ but not ‘cuda’.
The last didn’t surprise me, as I hadn’t downloaded cuda.
However, while ... freeall ‘’ after init ‘cpu’ (dropping the _jaf_) reported,
verbosely,
...
[0] AMD:
> On Fri, Jan 28, 2022 at 4:44 PM Eric Iverson
> wrote:
>
>> Sloppy release on my part. I will fix this in a few minutes.
>>
>>
>> On Fri, Jan 28, 2022 at 4:39 PM 'Mike Day' via Programming <
>> programm...@jsoftware.com> wrote:
>&
Sorry, iPad spell-checker rendered “mptime” as “motive”!
M
Sent from my iPad
> On 30 Jan 2022, at 10:49, 'Mike Day' via Programming
> wrote:
>
> One glitch:
> man_jaf_ ‘benchmarks’
> ...
> motive 4000NB. takes sev seconds
> ...
>
&g
So ...bench/matmul.ijs now has mpx, which now calls mptime, and returns
benchmarks for f64 and f32.
It’s fairly obvious what’s meant, but I’m getting two comments comparing J and
AF results, but they don’t state which of f36 or f64 applies. I’m
copy-typing, again, so typos rule:
J and AF r
l 3 arrayfire backends for me. The fp32 differ
> on all 3 backends. I think AMD gpus also match with fp64.
>
>
>
>
>
>
> On Sunday, January 30, 2022, 05:33:08 p.m. EST, 'Mike Day' via Programming
> wrote:
>
>
>
>
>
> So ...ben
This approach, from my A-level Maths perhaps, seems far too simple compared
to that of the article, but works, on this iPad running J701 (no, it can’t run
Ian’s J902!), including when dbho or dblo throws a domain error for, eg,
dividing order 50 by order 30. I haven’t tried in J903 on the l
Sorry if I misattributed. The one time I met Roger face to face was in a
London pub when he explained the idea to a few APLers, at the time he was
collaborating with John Scholes, I think.
I haven’t explored the remainder issue, since divisibility is assured in the
cyclotomic routines.
Ye
No, no acknowledgment expected; my contribution was trivial.
taskorderu is just an adverbial form of your taskorder with “u” replacing
“cyclotomic”
Cheers,
Mike
Sent from my iPad
> On 1 Mar 2022, at 17:13, Raul Miller wrote:
>
> Yes, pDiv was largely derived from your message. I did not
I’d forgotten the start to this thread, so have just checked: it seems to have
started with Raul Miller discussing J performance for a Rosetta Code task about
repunit primes; “large” numbers, eg ~10^1200 are considered. But later
correspondence suggests interest has shifted to incorporation o
Just checked on older versions: this also fails in J902 but works fine in J901
Mike
On 18/04/2022 01:53, David Lambert wrote:
> The test fn integrate 0 10 12 evaluates to a verb rather than to
>
> 9862.950182 14
>
> I suspect this is indicates a more widely spread issue with ol
One way to obtain high precision roots is to use, say, Newton’s solution to
y = x^2 - a :
Given an estimate x(n-1), the next estimate is
xn = x(n-1) - y/(dy/dx), in Maths notation.
In J, (J701 on this iPad),
rt =: -:@] + (% +:) NB. x is number whose root is required, y an initial
guess
I should also point out that:
a) I hadn’t knowingly updated J itself or any addons during or since
yesterday’s session.
b) I’m not aware of any other changes between yesterday’s Windows or J
environment (ok for Jqt) and today’s.
Thanks,
Mike
Sent from my iPad
> On 17 May 2022, at 07:34, 'Michae
I just tried 2!:0 ‘tzutil /g’ in J503, J602 & J805, of which I still have
runnable exes on
the Windows 11 laptop. All yield ‘domain error’.
However, shell ‘tzutil /g’ works in each version, confirming Raul’s surmise.
Cheers,
Mike
Sent from my iPad
> On 12 Jun 2022, at 05:01, Raul Mille
I got confused trying to reconcile Roger’s wiki essay version and his earlier
(I think)
forum posting. So here’s a new attempt to generalise his algorithm starting
from the
wiki essay. I’ve assumed the input’s ravel is of length an exact fourth power,
n4;
n1, n2, n3 are the lower powers, an
Perhaps I was just unlucky, but I tried an iPad-type “share” to Documents,
which didn’t produce a useable file; later downloaded a pdf with the Windows
11 laptop. Copy-paste from adobe worked to the extent that multi-spaces became
single spaces,
which I then filled out by hand!
Anyway, I’ll
Ahhh... I hadn’t spotted “hexadoku” - I’d used “alphadoku”. We shall see in
due course!
M
Sent from my iPad
> On 24 Jun 2022, at 12:24, 'Mike Day' via Programming
> wrote:
>
> Perhaps I was just unlucky, but I tried an iPad-type “share” to Documents,
> which didn
Sorry, Brian. I thought I’d removed the h from solveh- the h was for Hui, but
not
relevant for the version I prepared for this example. I had another “solve” in
a larger
script.
As for the dyadic version, the line below solve =: 3 : 0 , and before the :
line, shows a
default lhs argum
Doesn’t “unsubscribe” in the subject field do the trick for you?
If you’re really sure you want to leave us...
M
Sent from my iPad
> On 11 Sep 2022, at 16:28, lb_tay...@charter.net wrote:
>
> Hello.Could you please remove me from this distribution list for
> now?Thank you.Sallie
>
>-
Confirming Raul’s observations on this iPad running J701 under iOS 12.5.5 .
viewmat shows the circle, square and intermediate shape without problem,
presumably as required, after copying from the email and pasting into the
terminal screen, so Raul probably typed correctly. Also, same result u
Getting off topic, but why don’t the new Fold primitives work in the iPad app,
given it’s J9.03 beta-k?
The info screen links to a NuVoc description. I tried the example starting
with
v=: dyad define
z=. y + 0.01
z [smoutput x ; 'v' ; y ; '-->' ; z
)
…..
Pasting into a new script and ru
that the foldr script is missing, didn't it?
>>
>> Henry Rich
>>
>>
>> On Fri, Oct 21, 2022, 6:49 PM 'Mike Day' via Programming <
>> programm...@jsoftware.com> wrote:
>>
>>> Getting off topic, but why don’t the new Fol
It’s a moot point whether this should be under programming or beta; it looks as
if it’s the j engine rather than Ian’s amazing new iOS implementation.
In Jios for iPad:
NB. A toy example
foo =: {{)n
abcd
efgh
}}
foo NB. Expecting two rows…
abcd
efgh
LF cut foo NB. And two boxes…
ote:
>
> What's in the small box? (Do you have 13{a. in foo?)
>
> Thanks,
>
>
> --
> Raul
>
>> On Sun, Oct 30, 2022 at 1:32 PM 'Mike Day' via Programming
>> wrote:
>>
>> It’s a moot point whether this should be under programming or bet
If .../bin/jbreak.bat doesn’t work, I use Task Manager to “end task”. Forgive
me if
This is blindingly obvious, but you didn’t mention it!
Cheers,
Mike
Sent from my iPad
> On 2 Dec 2022, at 10:53, Richard Donovan wrote:
>
> Hi!
>
> Is there any way to avoid the situation whereby by er
Sorry, I didn’t spot Elijah’s reply.
M
Sent from my iPad
> On 2 Dec 2022, at 11:58, Mike Day wrote:
>
> If .../bin/jbreak.bat doesn’t work, I use Task Manager to “end task”.
> Forgive me if
> This is blindingly obvious, but you didn’t mention it!
>
> Cheers,
>
> Mike
>
>
>
> Sent from
LF2 ... new to me! I was a bit thrown by the parsing of the trivial example
being different from that for the data file; however that's likely a
by-product of copy&paste on the example versus downloading the file. Anyway, I
wasn't expecting LF,LF (or LF2); the usual
LF cut ...
missed the e
I encoded both ABC & XYZ as 0 1 2 and used 3x3 score-tables, different ones
for each part,
0 _1 _2 |."0 1 ] 3 6 0 for pt 1,
0 1 2 |."0 1 ] 3 1 2 for pt 2
There was an extra item to add in each part, corresponding to the chosen play,
rock/paper/scissors, in pt 1, and the specified result, l
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