That is pretty cool! Thanks.
On Sunday, July 20, 2014 7:41:18 PM UTC-4, Pierre-Yves Gérardy wrote:
I don't think it is supported out of the box, but you can achieve that
with a macro.
julia macro as(Typ, names...)
res = quote end
for n in names
Transposing is fine! Thanks for that!
On Sunday, 20 July 2014, Odd Andersen odd.ander...@gmail.com wrote:
Sparse matrices in Julia are to my understanding stored as compressed
sparse columns. So it is very easy to get the nonzero elements for a given
column, but not so easy for rows.
To
I have it in the following way
:app [(:lt.objs.style/set-skin dark)
(:lt.objs.langs.julia/julia-path C:\\Julia\\bin\\julia.exe)
]
and it works
On Sunday, 20 July 2014 22:15:15 UTC-4, Diego Tapias wrote:
Thank you @Joshua. That's what I got (I have followed the
Your version of julia may be too old. How did you install julia?
On Sun, Jul 20, 2014 at 4:12 PM, Diego Tapias dandrove...@gmail.com wrote:
I have got the following error whenever I try to run a Julia Script with the
editor LightTable:
Couldn't connect to Julia
ERROR: REPLCompletions not
1. It clearly isn't.
2. It will not cause any overhead in the common case (because it would be a
separate method in Julia). The question is whether this is a case where we
should guess what the user intended, or force the user to fix a potential
problem.
Not sure what we could do about this
Great write up! After some experiments I was able to reduce GC time from
65% to only 15% and see opportunities to do even better. Most important
things for me were:
1. Some BLAS functions (especially gemm!, which is pretty flexible).
2. Manual devectorization (@devec didn't work for my case).
On Monday, July 21, 2014 02:33:26 PM Andrei wrote:
I see one disadvantage of using these tools, however - they are much harder
to read. Are there any plans for automatic code optimization on compiler
level?
There are already many optimizations in place. But there's always more you
could do.
On Saturday, January 25, 2014 8:41:08 PM UTC+1, Johan Sigfrids wrote:
On Saturday, January 25, 2014 9:24:17 PM UTC+2, Jason Merrill wrote:
mma data = RandomReal[1.,1*^7]; min = .2; max = .3;
mma Total@Unitize@Clip[data,{min,max},{0,0}]
I claim that it takes *a lot* of experience to
Could you please point me to where these optimizations take place? I see
some other transformations (like escape analysis, for example) happening in
codegen, are there any other places I should look at?
On Mon, Jul 21, 2014 at 2:43 PM, Tim Holy tim.h...@gmail.com wrote:
On Monday, July 21,
Julia-syntax.scm (code lowering to ssa form) and type inference in base (type
propagation, data flow analysis, inlining) are other places where julia
performs compiler optimizations.
codegen is a big one, as are inference.jl, gf.c, and cgutils.cpp. But there
are optimization sprinkled throughout (e.g., ccall.cpp).
You might be interested in this:
https://github.com/JuliaLang/julia/issues/3440
Most of the optimizations so far are low level; most of the higher-level stuff
InplaceOps.jl is another package that can help: it substitutes some
matrix operations with their mutable BLAS-based equivalents.
On 21 July 2014 10:10, Tim Holy tim.h...@gmail.com wrote:
codegen is a big one, as are inference.jl, gf.c, and cgutils.cpp. But there
are optimization sprinkled
I agree that the `[a b c]` vs `[a, b, c]` syntax is something
likely to catch new-to-Julia users. I have personally watched people
struggle with that. Programmers familiar with other languages take a bit to
understand the vectors vs row-matrixes thing, when they were just expecting
a list/array
Hello colleagues,
i just filed an issue to Gtk (because a basic functionality; getting the
cairo context for a canvas; somehow doesn't work, at least in my
environment, and it did in former times) and i'd bet a bottle of tomato
ketchup on it: For sure it will be solved by git pulling the
Your guess was right @Keno, my version of Julia was very old. I updated to
the version 0.3.0 -rc1 and the problem was fixed.
Thanks for the help.
2014-07-21 2:19 GMT-05:00 Keno Fischer kfisc...@college.harvard.edu:
Your version of julia may be too old. How did you install julia?
On Sun, Jul
I think this problem must be resolved by better practices among package
maintainers: in short, the goal must be that as long as you only use (the
latest) tagged versions of any packages, everything should Just Work (TM).
That means, in short, that if a package maintainer adds functionality that
Warning for 2d row vectors used in context where only a 1d column vector is
used could definelty be implemented as help when you get a MethodError.
See also https://github.com/JuliaLang/julia/issues/7512.
Ivar
kl. 16:03:46 UTC+2 mandag 21. juli 2014 skrev Leah Hanson følgende:
I agree that
I'm hoping to play around with Geometric Moment Invariants, as (greyscale)
image feature descriptors. I get the impression that these might be part of
some stats package, but I'm coming at this from the machine vision side,
and so don't really know where to look. A few simple google searches
This is probably a simple question, I've done a string splitting operation
with split(), which has given me an array of SubString types, but I want
them to be of type String so as I can feed the bits of the split up string
to some method that requires a String type. string(*substring type*)
SubString is a subtype of String, so any function accepting a String should
accept a SubString. What function are you calling where this doesn't work?
-- Leah
On Mon, Jul 21, 2014 at 11:13 AM, Ben Ward axolotlfan9...@gmail.com wrote:
This is probably a simple question, I've done a string
I'm calling the constructor go a type I made, there's a string field is
accepts to fill a string field in the type.
On Monday, July 21, 2014 5:17:25 PM UTC+1, Leah Hanson wrote:
SubString is a subtype of String, so any function accepting a String
should accept a SubString. What function are
I've just tested the constructor with a dummy example, and it works so
obvious the error is elsewhere, I'll find it and update.
On Monday, July 21, 2014 5:17:25 PM UTC+1, Leah Hanson wrote:
SubString is a subtype of String, so any function accepting a String
should accept a SubString. What
I have been using Mathematica regularly for five years now and I am a new
user of Julia. As a first serious project I have used Julia to simulate a
nonlinear optical pulse propagation problem. I originally have written the
codes in Mathematica. The simulation time in Julia was roughly eight
Nope. Would be really useful for Images.jl. Or you could create your own
package, but if so please make sure it interoperates with Images.jl.
--Tim
On Monday, July 21, 2014 08:50:13 AM Andrew Gibb wrote:
I'm hoping to play around with Geometric Moment Invariants, as (greyscale)
image feature
If we introduced Covectors and a row slice of a Matrix was a Covector, then
this wouldn't be an issue anymore since we could simply allow sorting both
Vectors and Covectors but not Matrices. There's still the open question of
what taking a slice that looks like T[1,:,1] should produce. That's a
On Mon, Jul 21, 2014 at 9:55 AM, Zahirul ALAM zahirul.a...@gmail.com
wrote:
One feature I would like to see from IJulia may be is that the input of
greek and mathematical symbol in way that looks natural, e.g. using
subscript, in division, integration etc as way to input. This will
definitely
I was wondering if there anyone had any rules of thumb for when to create
parametric types of a parametric types (if this is even possible?).
To give a concrete example, I was messing around to describe/implement
elliptic curve point addition:
# ring of integers mod P
immutable Z{P} :
So a type parameter is a placeholder, that takes that takes a value from a
(optionally constrained) set when the type is instantiated.
Thus to say immutable ECPoint{EC{P}} where EC is a concrete type does not
make sense. I get the feeling you want to parameterise ECPoint by instances
of EC.
I get the feeling you want to parameterise ECPoint by instances of EC. Is
that right?
This is exactly correct (it does look like this is triangular dispatch,
thanks for the link). At the moment, I'm sticking the EC on every point as
an attribute:
immutable ECPoint{P}
x::Z{P}
Thanks Stefan. I did find out that I can type \alphatab for Unicode α. My
point was more to do with the traditional input / output mode.
btw if I am not mistaken I think in markup mode the \alphatab does not
work. I guess not even auto complete works in markup mode when pressed tab.
May be I
Gadfly has recently gotten the ability to do contour plots unless I'm
mistaken, so hopefully that helps a bit. The \alphatab business is
actually a tab completion trick implemented in the Julia completion
backend, rather than in the IJulia/IPython/Jupyter frontend. In markdown
mode, you can use
I was interested to define ++ as operator for concatenating strings. I
can define + for this purpose, but for ++ I get
julia function ++(x::String, y::String)
x * y
end
ERROR: syntax: expected ( in function definition
I looked up // in Rational.jl, but did not
Thanks a lot for all your answers! Now I need to take a break to learn all
these cool stuff and get prepared to such a bright future :)
On Mon, Jul 21, 2014 at 11:03 PM, Stefan Karpinski ste...@karpinski.org
wrote:
Automatic, general loop fusion is something that we want to make possible
and
It is not, look at julia-parser.scm for the list of operators you are able
to define.
On Monday, July 21, 2014 5:57:41 PM UTC-4, Steve Kelly wrote:
I think the issue is that ++ is not an operator in julia.
On Mon, Jul 21, 2014 at 5:51 PM, Hans W Borchers hwbor...@gmail.com
javascript:
I've spoken twice about TypeCheck.jl in the past couple of weeks (at
JuliaCon and Midwest.io). The Midwest.io talk has been posted:
https://www.youtube.com/watch?v=mL1Ow03G8tkfeature=youtu.be
Because Midwest.io is a general programming conference, there's background
on Julia before we get into
It is not, look at julia-parser.scm for the list of operators you are
able to define.
And I thought Julia allows to define operators as users like.
Is there a special reason (inconsistency) why ++ would not not be allowed
while // is?
Could this be changed by an appropriate entry in
Julia does not allow user-defined operators. There are just a lot of
pre-defined operators. We could add ++ as an operator, but we'd have to
decide how it parses and what it's precedence is. In Haskell it's an infix
operator used for concatenation. In C it's a prefix and postfix operator
that
This was excellent and informative. Thanks for sharing!
On Mon, Jul 21, 2014 at 6:19 PM, Leah Hanson astriea...@gmail.com wrote:
I've spoken twice about TypeCheck.jl in the past couple of weeks (at
JuliaCon and Midwest.io). The Midwest.io talk has been posted:
in the REPL, would it be reasonable to have ?? be able to do an
apropos() search?
Cameron
On Fri, Jul 18, 2014 at 4:40 PM, Viral Shah vi...@mayin.org wrote:
I think that most new users are unlikely to know about apropos. Perhaps we
should put it in the julia banner.
We can say something
+1
On Friday, July 18, 2014 3:40:14 PM UTC-5, Viral Shah wrote:
I think that most new users are unlikely to know about apropos. Perhaps we
should put it in the julia banner.
We can say something like:
Type help() for function usage or apropos() to search the
documentation.
apropos()
+1. For some reason my fingers always get tied up when typing apropos
There's one complication here, which is that a single ? already changes the
mode of the REPL into help mode. So this would have to be a mode only
triggerable from inside of help mode.
-- John
On Jul 21, 2014, at 6:47 PM, Ethan Anderes ethanande...@gmail.com wrote:
+1. For some reason my
Would it be crazy to make ? just do apropos? Interestingly, I was just
thinking of making ;; trigger sticky shell mode where you have to actively
escape to get back to julia mode.
On Mon, Jul 21, 2014 at 6:48 PM, John Myles White johnmyleswh...@gmail.com
wrote:
There's one complication here,
That’s not a crazy idea. ? could do help if there is an exact match, and if
there is no match, it can just do apropos.
-viral
On 22-Jul-2014, at 7:20 am, Stefan Karpinski ste...@karpinski.org wrote:
Would it be crazy to make ? just do apropos? Interestingly, I was just
thinking of making
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