;d be happy to label myself as
"responsible".
On Fri, Jul 3, 2015 at 12:50 PM, Neil Toronto mailto:neil.toro...@gmail.com>> wrote:
On 07/02/2015 08:37 PM, Benjamin Greenman wrote:
On Thu, Jul 2, 2015 at 11:23 AM, Neil Toronto
mailto:neil.toro...@gmail.com>
On 07/04/2015 05:26 PM, Neil Van Dyke wrote:
Any plans for new interesting GC/memory features in Racket?
For example, being able to inhibit GC for a time, being able to adjust
the GC trigger parameters dynamically, different ways to minimize GC
pauses or slowdown in the app behavior, real-time c
On 07/03/2015 12:32 PM, John Carmack wrote:
I am using a “cmd-name!” naming format for functions that are adding to
the command list that will be communicated to the host program.
(cmd-sound! WAV-FILE)
(cmd-set-position! pos yaw-radians)
Etc.
I am considering using a terser naming convention,
On 07/02/2015 08:37 PM, Benjamin Greenman wrote:
On Thu, Jul 2, 2015 at 11:23 AM, Neil Toronto mailto:neil.toro...@gmail.com>> wrote:
rounded ends are the only kind that compose nicely when drawn that way
Oooh, that's interesting. After sending the first email I'd actuall
On 06/24/2015 01:31 PM, Benjamin Greenman wrote:
I'd like to change the pen cap on my racket/plot images from the default
'round to 'butt. What's the easiest way to do this?
This is a little embarrassing, but there's not a way to do this.
If there *were* a way to do this, it would apply only t
On 07/02/2015 08:49 AM, Gabriel Laddel wrote:
[classification of Lisp hostiles]
Choose a stack for the initial "win" and DO NOT DEVIATE FROM IT. Select specific versions of
android, linux, OpenGL, racket, editor + required Unity/C++/etc you will support internally. When your
#1s decide that t
On 07/01/2015 10:47 AM, John Carmack wrote:
S-expressions actually are one of the core wins from my use of lisp so far --
embracing read/write (and the associated bandwidth cost) as a wire protocol
over yet another hand crafted binary format has been a significant win
(however, the flexibilit
On 06/30/2015 07:27 PM, 'John Clements' via Racket Users wrote:
On Jun 30, 2015, at 3:43 PM, George Neuner wrote:
that's just semantics.
XD
Let me expound a bit on John's pure-functional snooty-poo reply.
Semantics - what programs mean - is everything. Exactly how they're
compiled, inte
On 06/23/2015 08:32 PM, John Carmack wrote:
Here is the overview of the work that I recently sent out internally.
I started out with a pure-functional scripting interface, but it very rapidly became
imperative, and it is in heavy flux. The sample scripts do capture the general
"flavor" that I
On 06/23/2015 07:36 PM, John Carmack wrote:
The intersection of Gear VR owners and Racket users may consist of just
me at the moment, but if anyone else here is interested in discussing
the work I am doing with driving VR by Racket/Scheme, I would welcome
the input. Would that be an appropriate
On 06/22/2015 08:25 AM, Matthew Flatt wrote:
At Thu, 21 May 2015 07:15:14 -0600, Matthew Flatt wrote:
Otherwise, be prepared for me to come back in a few
weeks and lobby for moving to a new macro expander.
Here's the proposal: let's switch on July 16. "Switch" means that I'd
merge the new macr
Robby has just pushed an evil hack that makes plots and pict3ds
interactive again.
In the future, there will be a transition to a different "interactive
values" API, but it'll go a lot smoother.
Neil ⊥
On 06/21/2015 12:34 PM, Neil Toronto wrote:
It's bec
On 06/21/2015 02:54 PM, Alexis King wrote:
I guess I could add a close-on-stop clauses for programmers
such as your son but it sounds almost like he's ready to move
on to racket proper, as in use the Windowing API directly.
FWIW, despite big-bang’s position as a teaching tool, I much prefer it
On 06/19/2015 11:19 PM, Ryan Culpepper wrote:
* A `--clone` option for `raco pkg install` or `raco pkg update`
facilitates Git-based package development. If a package X has a Git
repository source, installing and updating the package pulls from the
repository in a read-only mode. Using
It's because of this:
https://groups.google.com/forum/#!topicsearchin/racket-dev/subject$3Asnip/racket-dev/Sqoeg1JX-wM
(If anyone knows of a nicer way to link to Google Groups posts, I'd love
to know what it is.)
Getting this (and Pict3D) working again on master is next on my to-do list.
Nei
e it a lot. Is there someway to check it out ahead of time?
My main concern is with my plots that are embedded in various GUI
elements. I sometimes did some weird things there,
On Tue, Mar 17, 2015 at 10:33 AM, Neil Toronto mailto:neil.toro...@gmail.com>> wrote:
Plot has been converted
Submit a bug report, because that number is obviously false. (Or you've
misunderstood how to use it, in which case the documentation probably
needs work. :D)
The problem is that first-order polymorphic contracts are O(n) in the
size of the data. See my other, much, much longer reply to Matthia
Your preferences are my command. :)
Actual Performance Bottlenecks (and Workarounds)
(1) Plot's sending of `snip%` instances from untyped to typed code made
them so slow that they were unresponsive. I got around it by making
helper functions to create the snips, and inserting their
On 04/29/2015 12:06 PM, 'John Clements' via Racket Users wrote:
TL;DR. All OK.
Only if you’re interested, a brief status report on the transition to Google
Groups:
- all old users invited.
- google groups still quarantines some things I wish it wouldn’t (just approved
2 posts from sketchy-sou
On 04/26/2015 02:39 PM, Matthias Felleisen wrote:
Once again, this is an instance where you'd really like to abstract the library
over the language into which its exports are imported. This is a constant
struggle for me, and I'd like to solve it.
Typed Racket has a good solution in the small
On 03/19/2015 10:00 PM, Neil Toronto wrote:
On 03/19/2015 02:09 PM, Raoul Duke wrote:
Currently, the vertex data for frozen shapes is transferred every
frame. The
3D engine is saturating your AGP bus.
the year 2003 called and wants its technology back. :-)
The year 1861 sent you a telegraph
On 03/19/2015 02:09 PM, Raoul Duke wrote:
Currently, the vertex data for frozen shapes is transferred every frame. The
3D engine is saturating your AGP bus.
the year 2003 called and wants its technology back. :-)
The year 1861 sent you a telegraph: they want their insult back. :p
Anyway... t
])
(freeze (set-emitted
(cylinder (pos i 0 0) (pos (+ i 1/2) 1/2 1/2) #:segments 2000)
(emitted "lightgreen" 2))
(define (on-frame s n t)
(displayln (- t s))
t)
(define (on-draw s n t)
p)
(big-bang3d 0 #:on-frame on-frame #:on-draw on-dra
Welcome!
Thank you for your past work. Trying to emulate it concretized and
motivated almost all of my high school and undergraduate math classes.
On 03/18/2015 02:59 PM, John Carmack wrote:
...
I have a specification for a VR related file format that is headed towards
JSON, but I am seriou
for
https://github.com/florence/convex-hulls, which pulls a bitmap% from the
snip% to render it as a gif. As long at the Plot object can get me a
bitmap% or its underlying vector, I would love the new interface.
or maybe I should just be using `plot-pict`...
On Tue, Mar 17, 2015 at 12:35 PM Ne
Plot has been converted to Typed Racket in the upcoming Racket 6.2.
I'm strongly considering taking this opportunity to improve the API. The
change is backward-incompatible, however, so I need input from those of
you who use Plot a lot.
In particular, recent experience with Pict3D makes it cl
se?
On Mar 16, 2015, at 7:12 AM, Neil Toronto wrote:
It should work fine for what you want to do with it. (It's exactly what I
thought of when I read your spec for it.) The only possible thing that can go
wrong with affine transformations is unwanted shear [1], and `point-at` never
produc
ict1 (basis ‘b1 t1)) ‘(b1)
(combine pict2 (basis ‘b2 t2)) ‘(b2))
could be replaced with
(combine pict1 (transform pict2 (from-to t2 t1)))
Would that make sense?
On Mar 16, 2015, at 7:12 AM, Neil Toronto wrote:
It should work fine for what you want to do with it. (It's exactly what I
thought o
On 03/15/2015 03:31 AM, Dr. C. SHUNMUGA VELAYUTHAM wrote:
I tried first glxinfo | grep "version" on my ubuntu machine and found that
openGL version is 1.4.
I also tried your racket code but it gave the following error
?: unbound identifier in module in: ?
The \lambda must have gotten mangle
v2 dv2) ; equivalent to (my-point-at v1 (pos+ v1 dv1) v2
(pos+ v2 dv2))
On Mar 15, 2015, at 5:58 PM, Neil Toronto wrote:
I'd generate a few different kinds of segments and then transform them into
place. Don't use `rotate` for that, though - there's an easier way.
Transfor
On 03/15/2015 04:54 PM, Alexander D. Knauth wrote:
On Mar 14, 2015, at 11:51 PM, Neil Toronto wrote:
What you need is to 1) create and combine the necessary Pict3Ds as much as
possible before the game starts; and 2) reuse them as much as possible during
the game.
You can even make the
On 03/14/2015 10:27 PM, Alexander D. Knauth wrote:
On Mar 8, 2015, at 10:53 PM, Neil Toronto wrote:
If you've ever had the slightest hankering to do some real 3D but avoided it
because of the pain that usually goes with it, try Pict3D. (If it fails to
work, please submit a bug repo
You're not doing anything wrong. Pict3D requires OpenGL version 3.0 or
higher to function, and it looks like your computer doesn't have it.
To find out for sure, here's what you can do:
* Mac OS X: Check the OS version number. You need 10.7.5 or higher.
* Linux: Run
glxinfo | grep "ver
This is what I ended up doing, as well as disabling mouse look on OS X.
I used Firefox's autoscroll as inspiration, and I think I've made it
usable enough. Let me know what you think.
Neil
On 03/11/2015 01:50 AM, Neil Van Dyke wrote:
John Clements wrote on 03/11/2015 01:38 AM:
Maybe simpler:
On Mar 10, 2015, at 9:34 PM, Neil Toronto wrote:
Robby was afraid that might happen on OS X. The weird thing is that I don't
have reports of it from any other OS X users.
It looks like we'll need alternative input methods for movement as well. (Turns
out that WASD aren't nece
On 03/10/2015 09:35 AM, Konrad Hinsen wrote:
Neil Toronto writes:
> Pict3D is finally ready for public consumption. You can install the
> package either in DrRacket using "File -> Install Package..." or from
> the command line using
>
> raco pkg inst
r 10, 2015 at 6:35 AM, Konrad Hinsen
mailto:konrad.hin...@fastmail.net>> wrote:
Neil Toronto writes:
> Pict3D is finally ready for public consumption. You can install the
> package either in DrRacket using "File -> Install Package..." or
from
> th
lix` example.
An easier-to-use solution would probably derive the first and second
derivatives from samples of the center position.
Neil ⊥
On 03/09/2015 03:37 PM, Alexander D. Knauth wrote:
Is there a good way to draw a smooth curved cylinder?
On Mar 8, 2015, at 10:53 PM, Neil Toronto wro
Pict3D is finally ready for public consumption. You can install the
package either in DrRacket using "File -> Install Package..." or from
the command line using
raco pkg install pict3d
The GitHub page is here:
https://github.com/ntoronto/pict3d
All features are documented. The API is
On 02/24/2015 01:11 PM, Konrad Hinsen wrote:
On 24/02/2015 16:41, Laurent wrote:
I've discovered a rather troubling behaviour when using `in-range` with
floating point numbers, which I think is worth knowing in case you
hadn't consider the issue before:
On my machine, I get the following:
(le
TR isn't really good about finding precise types for range sequence
elements. The macro-expanded code is too complicated.
When I write a loop with an index that needs to have a specific, narrow
type, I either use an assertion, as in
(for/list : (Listof Byte) ([b (in-range 256)])
(asser
Awesome! It's great to have you with us.
On 02/04/2015 05:28 AM, Marmaduke Woodman wrote:
[...]
1) The plotting library doesn't seem to have the equivalent of
MATLAB/MatPlotLib's imagesc/imshow, which simply plots a rectangular
colormap of the matrix. [1]
You can use Plot and `images/flomap`
You can do it if you have `flatten` also accept a predicate for A; i.e.
an (-> Any Boolean : A). Be aware that such functions can't be exported
to untyped Racket, though.
Neil ⊥
On 02/03/2015 08:31 PM, J. Ian Johnson wrote:
What if A is (Listof Integer)?
Generally a type variable naked in a u
On 01/31/2015 06:35 AM, Dr. C. SHUNMUGA VELAYUTHAM wrote:
Hi Everyone,
I am working in the area of evolutionary computation. I have been recently
interested in visualizing (primarily dynamic visualization) the processes
involved in Evolutionary Algorithms. Having taught SICP (with Racket) to
You can compute in log space using `log-gamma`:
(define (my-permutations* n k)
(exp (- (log-gamma (+ n 1)) (log-gamma (+ (- n k) 1)
I wouldn't trust the last four digits or so of large results, but that
may be accurate enough for what you're doing.
If not, look at "math/private/flon
Well, there is always the amazing math library. But somehow, the author
of `math/base` forgot to include a `sums` function!
There *is* a `flvector-sums` in `math/flonum`, which operates only on
flonums. If you can believe this, the documentation for that function
even *gives example code* for
On 01/22/2015 11:39 AM, Luke Whittlesey wrote:
For background, this code works::
begin working code
#lang typed/racket
(define-type Wire Symbol)
(define Wire? (make-predicate Wire))
(define-type WireVec (Listof Wire))
(define WireVec? (make-predicate WireVec))
;; dispatch based on t
On 01/17/2015 06:59 PM, Neil Van Dyke wrote:
George Neuner wrote on 01/17/2015 04:58 PM:
On 1/17/2015 1:26 AM, Neil Van Dyke wrote:
Finally, cross your fingers, and test it on target VM.
It's the "cross you fingers" part that worries me. I'd be happier if
I knew others already had done it
Is it possible to get something like this to typecheck in Typed Racket?
#lang typed/racket
(: transpose-vector-list (All (A ...) (-> (List (Vectorof A) ... A)
(Vectorof (List A ... A)
(define (transpose-vector-list xss)
(apply vector-map list xss)
Here are some options for representing lengths.
* Fixed-point numbers; i.e. a fixnum n represents n/2^k (where k = 16
for TeX). These are cheap and easy until you want to multiply or divide
them. Then they get more expensive and bit-shifty. You can forget about
doing anything else quickly. On
On 12/01/2014 11:46 AM, Mark Lee wrote:
On 12/01/2014 06:57 AM, Neil Toronto wrote:
Moved discussion to the Racket Users mailing list.
This isn't an extflonum error. Your extflonum implementation of the
fibonacci function is actually more accurate than your flonum
implementation.
Moved discussion to the Racket Users mailing list.
This isn't an extflonum error. Your extflonum implementation of the
fibonacci function is actually more accurate than your flonum
implementation.
While floating-point operations are fairly accurate, they're not (and
can't be) perfect impleme
Please, someone answer this man! I need to do the same kind of debugging
on Pict3D.
One thing I've noticed from just dumping the result of
(current-memory-use) to the terminal: sometimes memory use will
repeatedly climb until there's a major GC, and sometimes minor GCs will
be enough to keep
s, so as to know interesting
intervals where to do random testing, and possibly compute error bounds
(sometimes inf.0).
Probably not that simple I guess.
Laurent
On Mon, Oct 27, 2014 at 1:14 PM, Neil Toronto mailto:neil.toro...@gmail.com>> wrote:
This is the article I mentioned in my R
. Also, thanks to
Vincent Lefèvre (http://www.vinc17.org), Matthias Felleisen, and Robby
Findler, who reviewed it.
Neil
On 10/27/2014 06:05 AM, Konrad Hinsen wrote:
The current issue of "Computing in Science and Engineering" has a nice
article by Neil Toronto and Jay McCarthy on &q
That's what I do for superscripts. LaTeX would definitely be awesomer.
The change to allow picts would be pretty invasive. Everything that
computes sizes and baselines would have to change. I'd like Typed Racket
to prove that I haven't forgotten anything, so I'll do it after I
convert Plot to
It works now, and it is magnificent.
Neil ⊥
On 10/06/2014 10:31 PM, Robby Findler wrote:
I think I see what's wrong. I've pushed a fix. It involved a change to
the property values, so I pushed a change to TR too.
Robby
On Mon, Oct 6, 2014 at 7:37 PM, Neil Toronto wrote:
It&
It's from the "pict3d" package in my home directory.
Neil ⊥
On 10/06/2014 08:36 PM, Robby Findler wrote:
I think I need a little more help with this one. Is that from a file in
the repo somewhere?
Robby
On Monday, October 6, 2014, Neil Toronto mailto:neil.toro...@gmail.com&g
On 10/06/2014 06:58 PM, Asumu Takikawa wrote:
On 2014-10-02 18:48:32 -0500, Robby Findler wrote:
I've just pushed a change to check syntax that picks up tooltip syntax
properties in syntax objects that it sees. See the docs for
mouse-over-tooltips.
Thanks to Robby's very nice addition, I've ma
[rather later]
When can I have this wonderful thing?
As it is, I insert (ann e Void) to discover the type that TR gives `e`.
The type error is very informative.
With `case->` types, as you say, it can get tricky to find out which
combination of argument types produces which type for any give
I'm making a snip in Typed Racket. I have essentially this:
(define admin (send this get-admin))
(define editor (and admin (send admin get-editor)))
(when editor
(send editor set-caret-owner #f))
I get this error:
Type Checker: send: type mismatch
expected: an object
given:
On 07/20/2014 02:08 PM, Alexander D. Knauth wrote:
I ran into this when trying to do vector-ref on a value of type
In-Indexes from math/array.
If I do something like this:
#lang typed/racket
(: v : (U (Vectorof Index)
(Vectorof Integer)))
(define v #(0))
(ann (vector-ref v 0) Integ
On 07/16/2014 10:25 AM, Berthold Bäuml wrote:
Hi,
will there be serialization support for math/array and math/matrix in the near
future? As far as I understand in principle it should be possible at leas in a
straight forward way as there are already the routines array->list and
list->array.
There's no `array-set` yet. I didn't want to do it until I had a good
internal representation that supported efficient functional updates.
Alexander, your version of `array-set` will do fine in a pinch. Here are
a few things you might want to keep in mind.
1. If you're using strict arrays (th
You're very close. Try
(parameterize ([plot-x-ticks no-ticks])
(plot ...))
Neil ⊥
On 07/09/2014 12:04 AM, Robby Findler wrote:
Anyone know how to make a plot using 'lines' with ticks that are of my
own divising instead of the existing? The closest I've been able to
come is the below
I'm working on something like that right now, and will have something ready to
demo at RacketCon in September. The API will be similar to pict's, and
shouldn't be too hard to wrap 2htdp-style.
Neil T
Sent from my iPhone
> On Jul 2, 2014, at 12:40 PM, Kevin Forchione wrote:
>
> I took up Matt
m
>> [mailto:jensaxelsoega...@gmail.com] On Behalf Of Jens Axel Søgaard
>> Sent: sábado, 28 de junio de 2014 12:07
>> To: Jos Koot
>> Cc: Neil Toronto; Racket Users List
>> Subject: Re: [racket] FW: q about code for partitions
>>
>> Hi,
>>
>> I h
e:
Many of you have seen many emails and commits from my PhD student,
Neil Toronto, who has worked on projects like math and plot. He will
be defending his dissertation soon and we're going to stream the talk
for anyone who is interested.
The defense is Wednesday, June 11th, 2:00pm MDT and we
On 06/04/2014 12:36 PM, Jos Koot wrote:
Hi
In share/pkgs/math-lib/math/private/number-theory I find the following two
pieces of code:
line 34: (define m (/ (+ 1.0 (flsqrt (+ 1.0 (* 24.0 n 6.0))
line 39: (exact-floor m)
Obviously for finding the positive root of the equation n-k(3k-1)/2=0 f
This is one case in which Typed Racket could do better inference. I'm
not sure what the difference is between Listof and Sequenceof that makes
it treat them differently, but it does:
#lang typed/racket
;; Typechecks
(ann (list (vector 1 2 3))
(Listof (Vector Any Any (U Real False
;;
ve and raises one exception in that
cases and a different exception in the case that it gets a non-number
entirely.
Is that what you have in mind?
Robby
On Wed, May 21, 2014 at 1:17 PM, Neil Toronto wrote:
I thought there might be a contract-system-y reason; e.g. if I wanted to
change `g
On 05/21/2014 12:45 PM, Jens Axel Søgaard wrote:
2014-05-21 17:37 GMT+02:00 Laurent :
... it eats everything! (particularly exceptions)
For example, it is perfectly happy with the following:
% racket
Welcome to Racket v6.0.1.7.
(require plot)
(plot (function (lambda(x)(+ x n)))
#:x-min 0 #
hat if you wanted to take this on, Racketeers everywhere
would thank you.
Robby
On Wed, May 21, 2014 at 1:05 PM, Neil Toronto wrote:
Based on experience using Plot, I believe allowing all errors is a terrible
default.
Jay's suggestion would make it easier to ignore only some errors, especi
avior is to let the
errors thru, but that, if you turn that flag on, then it just swallows
all errors?
Robby
On Wed, May 21, 2014 at 12:18 PM, Neil Toronto wrote:
Division by zero and other math domain errors, primarily. There are two good
reasons to ignore these.
1. Plotting is for visualizing f
ere something wrong with doing that?
Robby
On Wed, May 21, 2014 at 11:09 AM, Neil Toronto wrote:
Referencing an identifier before its definition raises an
`exn:fail:contract:variable`. So that would put Plot in the weird position
of having to distinguish different kinds of contract errors, but not by
Referencing an identifier before its definition raises an
`exn:fail:contract:variable`. So that would put Plot in the weird
position of having to distinguish different kinds of contract errors,
but not by using subtypes or any other simple rule.
Maybe we should have an `exn:fail:contract:math`
t;= θ 360)(- θ 360)]
[else θ])))
Can you point me to your random real number generator, btw?
Robby
On Tue, May 13, 2014 at 9:06 AM, Neil Toronto wrote:
I can't get it to take more than on iteration, either. It's there in case I
missed something. :)
Neil ⊥
On 05/13
t of thing.
/Jens Axel
2014-05-13 1:39 GMT+02:00 Neil Toronto :
When I change it to operate on (Vectorof FlVector) instead of (Vectorof
(Vectorof Flonum)), I get this:
cpu time: 996 real time: 995 gc time: 22
1.9335
cpu time: 15387 real time: 15384 gc time: 13006
1.000
On 05/13/2014 10:26 AM, Jay Kominek wrote:
On Tue, May 13, 2014 at 9:35 AM, Konrad Hinsen
I see Racket's strength for scientific computing in a very different
aspect: the possibility to define languages tailor-made for expressing
computational models in some application domain. Scientists gener
On 05/13/2014 04:59 AM, Sam Tobin-Hochstadt wrote:
On May 13, 2014 3:38 AM, "Konrad Hinsen" mailto:konrad.hin...@fastmail.net>> wrote:
>
> Sam Tobin-Hochstadt writes:
>
> > On Mon, May 12, 2014 at 10:18 AM, Matthias Felleisen
> > mailto:matth...@ccs.neu.edu>> wrote:
> > >
> > >> If th
I can't get it to take more than on iteration, either. It's there in
case I missed something. :)
Neil ⊥
On 05/13/2014 05:59 AM, Robby Findler wrote:
Thanks, Neil!
Why is the loop needed? I can't seem to get it to take more than one iteration.
Robby
On Mon, May 12, 2014 at
He went with exact rationals. Here's another option, which preserves
inexactness:
(define (angle->proper-range α)
(let loop ([θ (- α (* 360 (floor (/ α 360])
(cond [(negative? θ) (loop (+ θ 360))]
[(>= θ 360) (loop (- θ 360))]
[else θ])))
0 0)))
(time
(let [(m (flonum-matrix-solve A b))]
(matrix-ref m 0 0)))
(time
(let [(m (matrix-solve A b))]
(matrix-ref m 0 0)))
(time
(let [(m (flonum-matrix-solve A b))]
(matrix-ref m 0 0)))
(time
(let [(m (matrix-solve A b))]
(matrix-ref m 0 0)))
2014-05-11 21:48 GMT+02:00 N
The garbage collection time is probably from cleaning up boxed flonums,
and possibly intermediate vectors. If so, a separate implementation of
Gaussian elimination for the FlArray type would cut the GC time to
nearly zero.
Neil ⊥
On 05/11/2014 01:36 PM, Jens Axel Søgaard wrote:
Or ... you co
On 05/01/2014 04:31 PM, John Clements wrote:
On Apr 28, 2014, at 8:29 PM, Neil Toronto wrote:
On 04/28/2014 05:28 PM, John Clements wrote:
The documentation for discrete probabilities goes out of its way to specified
that discrete distributions are unordered. However, it looks to me like
On 04/28/2014 05:28 PM, John Clements wrote:
The documentation for discrete probabilities goes out of its way to specified
that discrete distributions are unordered. However, it looks to me like order
is partially present; in particular, if I use ‘discrete-dist-values’ and
‘discrete-dist-probs
mething maybe helpful: when the \circ is in the string for draw-text
the text is NOT rotated 90 degrees counter-clockwise. When the \circ is
removed, the text is drawn rotated 90 degrees counter-clockwise.
...Ah, I see Kieron has uploaded an image to show. That is exactly what
I see.
Deren
On Fr
I can't replicate this problem on my machine, so I'll need more
information. Can you run the following program and reply with what you see?
#lang racket
(require racket/draw plot)
(plot (function sin #e1e-157 #e1e-156))
(define bm (make-bitmap 400 400))
(define dc (make-object bitmap-dc% bm)
On 04/17/2014 10:07 AM, Matthias Felleisen wrote:
Neil, a two-layer design, using option contracts, could be a solution here.
Interesting! So we could have both math/matrix and (say)
math/unchecked-matrix, where the former enables the option contracts
(e.g. that check matrix condition number
On 04/19/2014 09:43 PM, Alexander D. Knauth wrote:
On Apr 19, 2014, at 10:44 PM, Neil Toronto mailto:neil.toro...@gmail.com>> wrote:
That is weird. It works in the nightly build without annotating
anything but `sphere3d`, and likely in the next release as well.
Keyword arguments haven&
That is weird. It works in the nightly build without annotating anything
but `sphere3d`, and likely in the next release as well. Keyword
arguments haven't been all that well-supported in the past, so I'd try
making the arguments to sphere3d positional instead.
FWIW, the easiest way to destruct
On 04/18/2014 09:00 AM, Matthias Felleisen wrote:
On Apr 18, 2014, at 10:48 AM, Neil Toronto wrote:
Another benefit is that Typed Racket will no longer have to consider non-function letrec
bindings as having the type (U Undefined A) where A is the "real" type.
(Technically, (U U
On 04/18/2014 07:54 AM, Matthew Flatt wrote:
No one expects the # value!
Is this a... subtle... reference? [1]
Based on our experiment so far, it looks like the drawbacks probably
outweigh the benefits...
I think you meant this the other way around. :)
Another benefit is that Typed Racket
On 04/15/2014 12:59 PM, David Vanderson wrote:
Is there a way to access area's plot->dc? For this example I wanted to
ask if the mouse was within 2 pixels of any point.
There's unfortunately not. But if your plots don't have axis transforms
(i.e. have the identity transform), it's a linear f
iple repaint
requests in the queue should not be coalesced into a single paint?
Thanks,
Dave
On 04/01/2014 05:41 PM, Neil Toronto wrote:
On 04/01/2014 02:17 PM, David Vanderson wrote:
Plot is fantastic - thanks so much!
Is there a way to hook into the interactive features of plot so, for
instanc
FWIW, Jens Axel's "very close" needs quantifying: the entries are less
than 2^-52 away from comprising a non-invertible matrix. :)
But approximation error is a big deal, and quantifying and responding to
it currently has little support in `math/matrix'. We need two things to
start with. One re
umber of parameters (thats
why I wanted to put them in one mins-and-maxes argument instead of having
separate arguments for each min and max.
But I have no idea how to define something like this.
On Apr 10, 2014, at 11:27 PM, Neil Toronto wrote:
(define (sphere3
On 04/11/2014 02:04 AM, Konrad Hinsen wrote:
Neil Toronto writes:
> On git HEAD this takes about 15-20 seconds on my computer, depending on
> random sphere placement and size. It takes 5-6 seconds for 81 samples
> instead of 121. For comparison, the following takes 7-10 sec
On 04/10/2014 08:16 PM, Konrad Hinsen wrote:
Neil Toronto writes:
> It's unfortunately not. But I think there's something you can do
> instead: use `parametric-interval' to draw the circles instead.
Thanks for the example, which contains some nice tricks I'll k
On 04/10/2014 08:17 AM, Konrad Hinsen wrote:
Hi everyone,
I am trying to use (abuse?) Racket's 3D plots for molecular
visualization. It actually works out better than I expected, except
that I haven't yet figured out how to control the size of the plot
symbols in the way I want.
The documentat
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