hi,
I'm trying out matrices (without typed racket, though I read the performance
caveat -- I'm not worried about performance at the moment) and am trying to
find the best idioms for a small function I'd like to build.
Q1: is there an elegant away to assemble a matrix column-wise? (my first
On Friday, March 23, 2018 at 8:39:52 AM UTC-7, HiPhish wrote:
>
> I might reconsider the rentals part, but that's not relevant at the
> moment. My
> problem is that even though the three panes don't need to know anything
> about
> each other, they need to know about their parent (the main tab
Hi Tim,
Here is one way to do it:
#lang typed/racket
(require math/matrix math/array)
(: columns->matrix (All (A) ((Listof (Matrix A)) -> (Matrix A
(define (columns->matrix cs)
(define m (matrix-num-rows (first cs)))
(define n (length cs))
(: has-m-rows? : ((Matrix A) -> Boolean))
I’m fixing problems related to documentation on the libgit2 package, and it
appears there are a number of issues to fix, but the first one was that the
package was written with a main scribblings file called “manual.scrbl”. It
turns out this is a bad idea, and in fact this is mentioned in the
Hi All,
I'm not sure if it just happened after installing 6.12 but after working on
a program of some length I noticed I can't scroll any windows in DrRacket
with the scroll wheel (grabbing a scrollbar works). Even the Help -> About
DrRacket window won't scroll.
I'm using an external
> On Mar 25, 2018, at 12:25, Nadeem Abdul Hamid wrote:
>
> I had a student in class the other day also complaining about sluggish
> scrolling in DrRacket (while all other applications work fine), but I think
> he was using 6.11 on Mac OS X.
> — nadeem
FWIW, I think these are
While we're (sort of) on the subject of badges on pkgs.racket-lang.org: the
"This package needs documentation" badge is mostly great, both as a
producer and consumer of packages.
I've encountered at least two types of cases, though, where packages may
intentionally and justifiably lack
I had a student in class the other day also complaining about sluggish
scrolling in DrRacket (while all other applications work fine), but I think
he was using 6.11 on Mac OS X.
--- nadeem
On Sun, Mar 25, 2018 at 1:20 PM, Stephen Smith
wrote:
> Hi All,
>
> I'm not
http://pasterack.org/pastes/59894
for your desktop (4k monitor) :
(require plot)(plot-new-window? #t)
(plot(polar
(λ(θ)(+(exp(sin θ))(*(cos(* 4 θ))-2)(expt(sin(/(-(* 2 θ)pi)24))5)))
-99 99 #:samples 9)#:width 3870 #:height 2170)
On Friday, March 23, 2018 at 5:17:03 PM UTC-4,
http://pasterack.org/pastes/84326
(again - for your desktop)
(require plot)(plot-new-window? #t)
(plot(polar(λ(θ)
(*(+(*(cos(* 8 θ)).9)1)
(+(*(cos(* 24 θ)).1)1)
(+(*(cos(* 200 θ)).05).9)
(+(sin θ)1)))
(* pi -1) pi #:samples 9)#:width 3870 #:height 2170)
On Friday,
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