Hey all,
I decided to start learning Julia over the weekend and am having fun so
far. I implemented the wikipedia single layer perceptron algorithm as well
as kendall's tau to see what it would be like to develop a medium sized
package in the language. Link to the repo is below (the title just
Thanks John! Another reason why I brought up the last question is the fear
that following an R-style implementation will produce a Julia package that
is riddled with sub-optimal legacy code. But I guess Julia is not mature
enough that one could make such conclusions.
On Sunday, March 23, 2014
Thanks Jake! I'll also ask if they are willing to participate in the Julia
community by implementing a Julia version too! :)
On Sunday, March 23, 2014 6:14:33 PM UTC-7, Jake Bolewski wrote:
Another strategy is to contact the authors directly and ask them if they
would consider relicensing
I like the unified interface for differentiation. My only qualm is with
flattening out the hierarchy of packages by including DualNumbers. There
was some discussion on this here:
https://github.com/johnmyleswhite/Calculus.jl/pull/44
To start out, what is the intended scope of Calculus.jl? Once
Is this question not clear or just uninteresting?
On Monday, March 24, 2014 03:02:37 AM RecentConvert wrote:
Is this question not clear or just uninteresting?
You're not showing how you're actually calling the constructor. If I
copy/paste your type definition, and then say Status([1:12]), it works just
fine
for me. What version of Julia are
Sorry that you did not get any response, I did not comprehend what you were
trying to do last time.
The code you posted seems to work fine for me on 0.2.1 and 0.3-prerelease.
How did you trigger the error?
As a side note if efficiency is important, I would recommend that you use
Thanks for the quick replies.
*Purpose:* Given a double, convert it to a collection of boolean values
representing the statuses of various valves and settings.
I'm still torn about whether I want to input an array of values and store
arrays of statuses in one type or create an array of the
On Monday, March 24, 2014 03:56:08 AM RecentConvert wrote:
statuses = Status(vector(Dstc[StatusW]))
That's still not very helpful, because we have no idea what
vector(Dstc[StatusW]) yields. Does Status([1:12]) work? If so, the problem
is in the particular inputs you're supplying. If not, then
Maybe the pmap example from the doc can be useful, it feeds work to other
processes:
http://julia.readthedocs.org/en/latest/manual/parallel-computing/#synchronization-with-remote-references
Instead of asking the package authors to do extra work, it might be
better to offer to convert their package to a Julia package. Then, you
can ask the authors if the converted package could be released with an
MIT license.
On Mon, Mar 24, 2014 at 2:18 AM, Ted Fujimoto tftur...@gmail.com wrote:
Hi!
I'm trying to construct a 3 dimensional array from a number of 1
dimensional arrays. Essentially what i would like to do is
a = [f(i, j) for i in 1:n, j in 1:m]
where f(i, j) is a function that returns an array (note, f has to construct
the entire array at the same time). The code above
The updated code works the same with Status([1:12]) as it does with
vector(Dstc[StatusW]).
type Status
Valve1::Vector{Bool}
Valve2::Vector{Bool}
Valve3::Vector{Bool}
Valve4::Vector{Bool}
Valve5::Vector{Bool}
Valve6::Vector{Bool}
Valve7::Vector{Bool}
Valve8::Vector{Bool}
I'm definitely not an expert but I thought I would chime in on your arrays of
arrays vrs matrices question.
I recently developed a project where I started out using:
Array{Array{Float64,1},1} as a container for a set of state vectors in an ODE
flow. This seemed most natural but I figured once
I think comparisons between those two will depend a lot on context. If you need
to use linear algebra functions, the Array{Array{Float64, 1}, 1} approach won’t
work at all, so it’ll be infinitely slow. If you’re constantly just grabbing
columns stored that way, it might be faster since you
Yep, that was my situation: no linear algebra but a lot of grabbing columns
within for loops. Looking forward to non-copying array slices:)
Thanks,
Ethan
Yes, we need this ability. Externally terminating and otherwise interacting
with tasks is a good way to deal with things like timeouts and cancelling
distributed work.
On Mon, Mar 24, 2014 at 1:01 AM, Amit Murthy amit.mur...@gmail.com wrote:
I think currently the only way to interrupt a task
Just for the record. To convert from Array{Array{Float64, 1}, 1} to
Array{Float64,2} you can use hcat(a...)
Ivar
kl. 15:50:36 UTC+1 mandag 24. mars 2014 skrev Ethan Anderes følgende:
Yep, that was my situation: no linear algebra but a lot of grabbing
columns within for loops. Looking
I probably was not clear in my response to Jake but what I meant was that I
would ask the authors if they wanted to use the GPL because they felt that
license was most appropriate. If not, I would then give them the choice to
*assist* me at any level they choose with a Julia version of their
I probably was not clear in my response to Jake but what I meant was that I
would ask the authors if they wanted to use the GPL because they felt that
license was most appropriate. If not, I would then give them the choice to
*assist* me at any level they choose with a Julia version of their
I think Tom’s point is that most people prefer that you assist them rather than
offer them the chance to assist you.
— John
On Mar 24, 2014, at 8:58 AM, Ted Fujimoto tftur...@gmail.com wrote:
I probably was not clear in my response to Jake but what I meant was that I
would ask the authors
OK. How about asking if I could assist *them* on a Julia version under an
MIT license? The result is the same but I guess language does make a
difference...
On Monday, March 24, 2014 9:08:23 AM UTC-7, John Myles White wrote:
I think Tom’s point is that most people prefer that you assist them
Alternatively, might be fun to make a ccall_in_worker_thread
intrinsic which handles all of the fiddly gc details and only blocks the
local task (and/or returns a remoteref)
On Monday, March 24, 2014, Stefan Karpinski ste...@karpinski.org wrote:
Yes, we need this ability. Externally terminating
Hallo Bill; could you please explain or post some reference about that
specialised version you mention of the QL iteration to get directly the
first components of the normalised eigenvectors. As I am working with
complex, non-hermitian, symmetric eigenvalue problems it would be of great
help.
This runs fine for me, running Version 0.3.0-prerelease (2014-02-28 04:44
UTC):
f(i,j) = [i,j]
n=3; m=2
a = [f(i, j) for i in 1:n, j in 1:m]
Out[91]:
3x2 Array{Any,2}:
[1,1] [1,2]
[2,1] [2,2]
[3,1] [3,2]
On Monday, March 24, 2014 10:07:49 AM UTC-4, Linus Mellberg wrote:
Hi!
I'm
I get
julia x.Valve1
12-element Array{Bool,1}:
true
false
true
false
true
false
true
false
true
false
true
false
I even went to the trouble to build Julia 0.2.1 and test it there, too; same
result. So I can't replicate your problem. (I'm on Linux.)
How are you getting Julia?
Hi, I guess you want a 3d array instead of a 2D array containing 1D arrays.
I tried this:
arrayLength = 10;
matrixCols = 10;
matrixSlices= 10;
function arrayTest(arrayLength,i,j)singleArray =
ones(1,arrayLength)*(i+j); #each array has a unique value i+jreturn
singleArrayend
If you really want a 3d matrix and not a 2d array containing arrays, I
would have tried this :
arrayLength= 10 ;
matrixCol = 10;
matrixSlices= 10;
function arrayTest(arrayLength,i,j)
singleArray = ones(1,arrayLength)*(i+j); #each array has a unique value
i+j
return
Thinking about it, it is probably not so ... efficient.
Le lundi 24 mars 2014 19:41:14 UTC+1, Antoine Chevalier a écrit :
Hi, I guess you want a 3d array instead of a 2D array containing 1D
arrays. I tried this:
arrayLength = 10;
matrixCols = 10;
matrixSlices= 10;
function
Ok, one might be less redundant if reading the thread properly before
posting. Sorry about the noise.
Den måndagen den 24:e mars 2014 kl. 23:12:03 UTC+1 skrev Gunnar Farnebäck:
[f(i,j)[k] for k in 1:K, i in 1:n, j in i:m]
Den måndagen den 24:e mars 2014 kl. 15:07:49 UTC+1 skrev Linus
The error message I got was:
System image file C:\project\Debug\../lib/julia/sys.ji not found
This occurred when I called jl_init() with NULL. It seems that it is trying
to find files relative to the executable file location.
I tried setting JULIA_HOME environment variable but that did not
This isn't really possible right now--large, essential parts of Julia are
written in Julia, and there's not full differentiation between the core
needed just to get the language running and the other components included
in Base. Please see https://github.com/JuliaLang/julia/issues/5155 and
Hello,
On Friday, March 21, 2014 4:31:59 AM UTC+1, Jiahao Chen wrote:
I wrote a similar package long ago for Python and remember SGE array jobs
well.
If ClusterManager's addprocs_sge function doesn't respect the current
working directory in the worker processes, it would be nice to
Hi,
What is the fastest way to create a matrix containing random integers: 1 or
-1 with equal probability?
I have tried the following options but was wondering if I am missing
something.
(I also need 1, 0 or -1 with different probabilities later, which is why I
don't just use a boolean random
How about
In [186]: @time rand(-1:2:1,1,1);
elapsed time: 2.29940616 seconds (80224 bytes allocated)
No need for an extra function. This uses a range from -1 to 1 with a step
size of 2 so you only get those two numbers.
-Jacob
On Mon, Mar 24, 2014 at 7:21 PM, David P. Sanders
Hi,
I can't figure out the syntax to set Qt graphics properties in PySide.jl
For example, how to translate the following Python code:
sizer.setAlignment(Qt.AlignTop)
or
pw.layout().setSizeConstraint(QLayout.SetFixedSize)
or
cw.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)
any help would
it's not completely clear to me what you're asking. julia isn't
particularly object oriented (i just checked and there's no mention of
objects or classes in the intro at http://julialang.org/)
having said that, you can store and modify (unless the type is immutable)
values in composite
It varies.
qt_enum(AlignTop) will do the first,
Qt.QVBoxLayout()[:SetFixedSize] the second, and
Qt.QFrame()[:Sunken] the third.
The qt_enum() function is basically
pyimport(PySide.QtCore)[Qt][:property_name]
which is needed to fish properties out of the Qt object, as @pyimport will
another PySide.jl question, how to set the parent to None
after removing a widget? If I attempt it I get the following error:
julia pw_prm_sizer_0[:removeWidget](wd[fieldLabel][1])
julia wd[fieldLabel][1][:setParent](None)
ERROR: PyError (PyObject_Call) type 'exceptions.TypeError'
I don't really know. This of course is an issue, as it likely won't get
garbage collected once removed. I thought setting the parent to `nothing`
would work, but it doesn't. If you find something that does work please let
me know.
On Monday, March 24, 2014 9:00:13 PM UTC-4, Samuele Carcagno
Let's say I have this composite type
julia type t
aa::ASCIIString;
bb::ASCIIString;
end
and try to fill it a la C (or Matlab)
julia tt=t
t (constructor with 1 method)
julia tt.aa=AA
ERROR: type DataType has no field aa
so bad surprise. I can't. So I have to do for
tt = t( [ for i = 1:120]... )
On Mon, Mar 24, 2014 at 9:43 PM, J Luis jmfl...@gmail.com wrote:
Let's say I have this composite type
julia type t
aa::ASCIIString;
bb::ASCIIString;
end
and try to fill it a la C (or Matlab)
julia tt=t
t (constructor with 1 method)
Thanks a lot
It would be nice to have a kind of repository for tricks where this one
would deserve a place
Terça-feira, 25 de Março de 2014 1:55:32 UTC, Jameson escreveu:
tt = t( [ for i = 1:120]... )
On Mon, Mar 24, 2014 at 9:43 PM, J Luis jmf...@gmail.com javascript:
wrote:
Let's
On Monday, March 24, 2014 09:55:32 PM Jameson Nash wrote:
tt = t( [ for i = 1:120]... )
You can also define an inner constructor and leave many/all of the fields
uninitialized.
--Tim
On Mon, Mar 24, 2014 at 9:43 PM, J Luis jmfl...@gmail.com wrote:
Let's say I have this composite type
The doc of getfield says
getfield(*value*, *name::Symbol*)
Extract a named field from a value of composite type. The syntax a.b calls
getfield(a, :b), and the syntax a.(b) calls getfield(a, b).
but when I try the a.(b) variation, it errors (or it's me who errors?)
julia gmt_modules.write
?I,?O
You need to pass a variable containing a Symbol. Try write = :write
On Mon, Mar 24, 2014 at 10:46 PM, J Luis jmfl...@gmail.com wrote:
The doc of getfield says
getfield(*value*, *name::Symbol*)
Extract a named field from a value of composite type. The syntax a.b calls
getfield(a, :b), and
After some experimentation, it looks like second way takes a symbol or
variable who's value is a symbol.
julia type MyType; a::Int; end
julia x = MyType(3)
MyType(3)
julia x.a
3
julia x.(a)
ERROR: a not defined
julia x.(:a)
3
julia b = :a
:a
julia x.(b)
3
On Monday, March 24, 2014
Thanks
So this means we cannot do the dynamic names as in Matlab (where the b is
the member name)
BTW, I needed to extract the member name as a string to compare with
another string and the only way I got it done was with
julia nomes=names(MyType)
1-element Array{Symbol,1}:
:a
julia
dynamic names can be handy, but they are also quite slow.
symbol(string(nomes[1])) === nomes[1]
On Mon, Mar 24, 2014 at 11:13 PM, J Luis jmfl...@gmail.com wrote:
Thanks
So this means we cannot do the dynamic names as in Matlab (where the b is
the member name)
BTW, I needed to extract the
On Sunday, March 23, 2014 11:29:37 PM UTC-7, Miles Lubin wrote:
I like the unified interface for differentiation. My only qualm is with
flattening out the hierarchy of packages by including DualNumbers. There
was some discussion on this here:
Thanks for the discussion and thanks to JMW for the pull request!
On Sunday, March 23, 2014 9:42:19 PM UTC-7, Ryan Gehring wrote:
Hey all,
I decided to start learning Julia over the weekend and am having fun so
far. I implemented the wikipedia single layer perceptron algorithm as well
as
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