Re: [julia-users] Re: Any examples of using Julia with online judge systems

The tech evangelism you are talking about is akin to PR or promoting a piece of tech to attract users to it. Online judge systems have to do exclusively with education (basic, intermediate, advanced) to teach algorithmics. This is an intellectual debugger, a sort of. 2016-06-29 13:58 GMT+10:00

[julia-users] Re: Any examples of using Julia with online judge systems

This would be one form of tech evangelism. I wonder if there are any communities set up for Julia evangelism?

[julia-users] Is there a way to create a DataArray of a particular eltype (Int8 in my case) using a list comprehension or a map function?

I am trying to write a function that I can use to recode values into a new variable of Int8 type: function recode!(df::DataFrame, old::Symbol, new::Symbol, coding::Dict) df[new] = DataArray([isna(x) ? NA : coding[x] for x in df[old]]) end recode!(df,:race,:race3,Dict(1=>5,2=>6,3=>7,4=>8))

[julia-users] Re: Broken pipe when executing println on a remote worker

Answered my own question after a few more hours of sweat and tears. I had mis-understood the documentation, and what I said previously was correct. The cluster manager must maintain the stdout IO stream and pass it to the WorkerConfig.io field.

Re: [julia-users] Re: JuliaCon schedule announced

+1 On Tuesday, June 28, 2016 at 11:44:13 PM UTC+8, mmh wrote: > > Hi Viral, we have an eta on when the talks will be up on youtube? > > On Wednesday, June 22, 2016 at 11:13:25 AM UTC-4, Viral Shah wrote: >> >> Live streaming was too expensive and we did not do it this year, but we >> certainly

[julia-users] Re: Broken pipe when executing println on a remote worker

Is it the case that the cluster manager must continue to redirect stdout to the master after the master/slave handshake has been completed? I noticed this line in the documentation: - The cluster manager captures the stdout’s of each worker and makes it available to the master process

[julia-users] Broken pipe when executing println on a remote worker

I've launched workers on remote servers using my own cluster manager. It appears to be configured correctly, the workers launch, I can execute remotecall on them. But when I try to run a remote `println` command I get a broken pipe. `stdout` doesn't seem to forward to the master as I would

Re: [julia-users] jl_tuple2

On Tue, Jun 28, 2016 at 7:17 PM, Oscar Blumberg wrote: > https://github.com/JuliaLang/julia/blob/master/src/julia.h#L588 Oh, sorry, this thread fall off my reply list twice > Yichao, could you explain why this is unsafe? Yes, exactly what Oscar said. The results of

Re: [julia-users] jl_tuple2

https://github.com/JuliaLang/julia/blob/master/src/julia.h#L588 On Monday, June 27, 2016 at 2:16:01 PM UTC-4, Stephen Chisholm wrote: > > Yichao, could you explain why this is unsafe? Do you know of an > alternative which is safe? > > On Monday, 20 June 2016 16:31:29 UTC-3, Yichao Yu wrote: >>

[julia-users] Re: ERROR: LoadError: __precompile__(true) but require failed to create a precompiled cache file

It's worth discussion. Should be simple enough to find the error and submit a pull request with any proposed changes: $ git grep -n "failed to create a precompiled cache file" base/loading.jl:339:warn("require failed to create a precompiled cache file") base/loading.jl:366:

[julia-users] Re: ERROR: LoadError: __precompile__(true) but require failed to create a precompiled cache file

Sorry for the noise, but this was just a programming error of me. Back to the orignal question: Would it be possible to improve the following error message: ERROR: LoadError: __precompile__(true) but require failed to create a precompiled cache file Such that it says: Please try to restart

[julia-users] Re: ERROR: LoadError: __precompile__(true) but require failed to create a precompiled cache file

Ok, I restarted Julia, tried to include my program again. It failed again. Did another Pkg.update() and tried to include my program again. It failed again, but now with a different error: julia> include("Plotting.jl") ERROR: LoadError: LoadError: LoadError: LoadError: MethodError: `*` has no

[julia-users] dictchannel.jl example

Strangely though, if I modify the put! function as: function put!(D::DictChannel, k, v) D.d[k] = v notify(D.cond_take) Println(keys(D.d)) D end And run this I get Any[2,3,1] (I added keps in that order), i.e. This works So it seemed the function definition of keys does not

[julia-users] dictchannel.jl example

I believe you need to "fetch" the value in the RemoteRef. This should return your Dict that you can then use keys on.

[julia-users] dictchannel.jl example

Strangely makning a function function keys(D::RemoteRef{DictChannel}) keys(D.d) end Gives also error: LoadError: type RemoteRef has no field d Also, for the function put! That does work the function looks like: function put!(D::DictChannel, k, v) D.d[k] = v notify(D.cond_take)

[julia-users] Re: how to get rid of axis in Plots ?

I just found in the same time ... Thank you :) Le mardi 28 juin 2016 17:48:34 UTC+2, Henri Girard a écrit : > > I don't see any command to get rid of axis in Plots or hide them > I tried axis=false axes =false idem with none but nothing works... > >

[julia-users] Re: how to get rid of axis in Plots ?

Solved Le mardi 28 juin 2016 17:48:34 UTC+2, Henri Girard a écrit : > > I don't see any command to get rid of axis in Plots or hide them > I tried axis=false axes =false idem with none but nothing works... > >

[julia-users] Re: how to get rid of axis in Plots ?

Answering myself, after reading I noticed I wasn't using the good command : Axis was wrong... They are border =false and ticks = false x=linspace(-2,2) t=linspace(-pi/4,pi/4) f(x) = sqrt(4-x^2) g(x) = -sqrt(4-x^2)

[julia-users] Re: Extending functions in Base (or another module)

You might also want to express your perspective on why a function such as invoke is needed here https://github.com/JuliaLang/julia/pull/13123. On Tuesday, June 28, 2016 at 5:26:16 PM UTC+2, Bill Hart wrote: > > We have hit an issue that we can't seem to find a workaround for. Our only > working

Re: [julia-users] how to get rid of axis in Plots ?

Try 'ticks=nothing, border=nothing' On Tuesday, June 28, 2016, Henri Girard wrote: > I don't see any command to get rid of axis in Plots or hide them > I tried axis=false axes =false idem with none but nothing works... > >

Re: [julia-users] Re: Extending functions in Base (or another module)

There is some discussion on invoke on github: https://github.com/JuliaLang/julia/pull/13123 maybe you want to weight in. On Tue, 2016-06-28 at 19:19, 'Bill Hart' via julia-users wrote: > You are a life saver. This is *precisely* what we need. Thank you for >

[julia-users] dictchannel.jl example

You have defined a keys method for a DictChannel but the error message is for a RemoteRef{DictChannel} which you have no method for.

Re: [julia-users] Oracle ODBC

Yes, that's correct. To use the RORACLE package in R, you need to have the Oracle client installed also. But it seems that's also the case with ODBC according to the first reply to this post. I totally understand this is low on the priority of the things that could be implemented since there

Re: [julia-users] Re: Extending functions in Base (or another module)

You are a life saver. This is *precisely* what we need. Thank you for solving a very difficult problem for us. We were really pulling our hair out after searching for a solution. julia> module Nemo import Base: det abstract MatElem function det(a::MatElem)

[julia-users] PyPlot plots will not show in non-interactive mode.

I've managed to mess up the PyPlot package and cannot manage to get it straightened out. I am trying to plot from a script, but now get: ERROR: MethodError: 'show' has no method matching show() I installed a new python environment using Anaconda and attempted to switch Julia to use the new

[julia-users] Re: Extending functions in Base (or another module)

Another possibility: introduce a special "extends" syntax to Julia, e.g. module Hecke type SpecialMat <: Nemo.MatElem end function det(a::SpecialMat) if blah # do whatever else Nemo.det end end extends det Nemo.det # tells Julia to somehow treat the det implementation

[julia-users] Re: Extending functions in Base (or another module)

By the way, here are some potential things that could solve this for us: 1) Allow individual methods to be callable, as in Julia 0.4 (so long as we can look the methods up at "compile time" in a module and assign them to a const in the module so that they can be called). As far as we can see,

Re: [julia-users] Julia for Newbie Programmer.

You could try some of the intro materials at http://julialang.org/learning/, especially in the "Tutorials" section. On Tue, Jun 28, 2016 at 11:12 AM, Adrian Felismino < adriantfelism...@gmail.com> wrote: > I got lost even I read the julia manual. I have Python Basics Programming > Language but I

Re: [julia-users] Re: JuliaCon schedule announced

Hi Viral, we have an eta on when the talks will be up on youtube? On Wednesday, June 22, 2016 at 11:13:25 AM UTC-4, Viral Shah wrote: > > Live streaming was too expensive and we did not do it this year, but we > certainly want to next year. > > -viral > On Jun 22, 2016 10:33 AM, "Gabriel

[julia-users] Julia for Newbie Programmer.

I got lost even I read the julia manual. I have Python Basics Programming Language but I can't comprehend simple things in julia like input("") function in python. any advise?

[julia-users] dictchannel.jl example

the dictchannel is in the julia package as an example of Channels https://github.com/JuliaLang/julia/blob/master/examples/dictchannel.jl

[julia-users] Extending functions in Base (or another module)

We have hit an issue that we can't seem to find a workaround for. Our only working workaround is no longer supported by Julia 0.5. The issue We implement determinant for various kinds of matrix types in Nemo and Hecke (two computer algebra/number theory packages). To do this, we

[julia-users] dictchannel.jl example

I have great use of the dictchannel.jl example. I wanted to add the method keys to it so I thought that I simply add the function: function keys(D::DictChannel) keys(D.d) end as well s add the function name in the import (I tried also without adding the "keys") : import Base: put!, wait,

[julia-users] Re: yin/yang

I think `plot!` is your friend here: plot(h,fill=g, -2,2,aspect_ratio=1) plot!(h,fill=f, -2,2,aspect_ratio=1) On Tuesday, June 28, 2016 at 10:12:28 AM UTC-4, Henri Girard wrote: > > How to put them toghever to have only one picture ? > plot h,g,f gives me only the curves not the fill... > Any

[julia-users] yin/yang

How to put them toghever to have only one picture ? plot h,g,f gives me only the curves not the fill... Any help HG using Plots function h(x) if x<0 return sqrt(-x^2-2*x) else return -sqrt(-x^2+2*x) end end; x=linspace(-2,2) t=linspace(-pi/3,pi/3) f(x) = sqrt(4-x^2)

[julia-users] Re: Plots with Plots

Thanks, I am doing yin-yang but have problems to color, I want it red and grey : using Plots function h(x) if x<0 return sqrt(-x^2-2*x) else return -sqrt(-x^2+2*x) end end; x=linspace(-2,2) t=linspace(-pi/3,pi/3) f(x) = sqrt(4-x^2) g(x) = -sqrt(4-x^2); d=plot(h,

[julia-users] Re: Plots with Plots

Ok I don't think you need recipes for this... just a simple call to 'plot' with the attributes you want. See the "attributes" page of the docs for descriptions of what's available. On Tuesday, June 28, 2016, Henri Girard wrote: > Well... It's here I got your examples : >

[julia-users] Re: Plots with Plots

Well... It's here I got your examples : https://github.com/tbreloff/ExamplePlots.jl/blob/master/notebooks/apply_recipe.ipynb I just wanted to try it... My next aim is to use ODE with plots to do my portrait phase and RLC from pyplot to Plots --pyplot-

[julia-users] Re: Plots with Plots

I think you must be looking at an old example? Can you tell me where you found it so I can update? '_apply_recipe' doesn't exist, and you shouldn't have to import it anyways. Let me know what your end goal is and I can help. I understand the docs need better organization. On Tuesday, June 28,

[julia-users] Re: ERROR: LoadError: __precompile__(true) but require failed to create a precompiled cache file

Restart Julia and try again. (This is because the old Compat module was already loaded, so the new precompiled one couldn't load.)

Re: [julia-users] vector of vectors to array

Hi Mauro, no, that's *exactly* what I was looking for... thanks a lot :) Best regards, Ferran. On Tuesday, June 28, 2016 at 10:37:46 AM UTC+2, Mauro wrote: > > > julia> Vector[rand(3), rand(3), rand(3)] > 3-element Array{Array{T,1},1}: >

Re: [julia-users] vector of vectors to array

julia> Vector[rand(3), rand(3), rand(3)] 3-element Array{Array{T,1},1}: [0.08082297930289717,0.4831571293164978,0.7227686419871842] [0.7376841239302636,0.6150435898281146,0.1474762464521686] [0.9699744293150396,0.19770809574045556,0.638619038137211] julia> hcat(ans...) 3x3 Array{Float64,2}:

[julia-users] vector of vectors to array

Hi, probably simple question but can't find the answer. I have a vector of vectors like this one chi2_mods 3-element Array{Array{Float64,1},1}: [7245.87,7242.98,7240.08,7237.18,7234.28,7231.39,7228.49,7225.59,7222.7,7219.81 …

[julia-users] Re: Plots with Plots

That's what I get,any help : Pkg.checkout("Plots") Pkg.checkout("PlotRecipes") using Plots, PlotRecipes pyplot() import Plots: _apply_recipe, KW immutable F f::Function end getf(f::F) = f.f WARNING: could not import Plots._apply_recipe into Main