# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=497

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**Page:** 498

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## [State of distributed processing in Julia](https://discourse.julialang.org/t/state-of-distributed-processing-in-julia/24191)

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**Author:** [@felipenoris](https://discourse.julialang.org/u/felipenoris)\
**Replies:** 3\
**Last updated:** [May 14, 2019, 4:49pm UTC](https://discourse.julialang.org/t/state-of-distributed-processing-in-julia/24191 "2019-05-14T16:49:42Z")

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I’ll be working on a Hadoop cluster (hdfs+yarn). I’m checking the best options to integrate Julia in this environment to handle big data distributed processing. Any ideas on the best options? Spark.jl? Elly.jl? Mount hd…

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## [BARON - Setting branching priority](https://discourse.julialang.org/t/baron-setting-branching-priority/24213)

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**Author:** [@EgidioLeo](https://discourse.julialang.org/u/EgidioLeo)\
**Replies:** 0\
**Last updated:** [May 14, 2019, 4:10pm UTC](https://discourse.julialang.org/t/baron-setting-branching-priority/24213 "2019-05-14T16:10:48Z")

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Hi all! I am trying to set branching priority in BARON for some variables but I cannot find any related documentation. Any suggestions how to do this? Thank you in advance. Egidio

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## [Different colors regions for different heatmaps](https://discourse.julialang.org/t/different-colors-regions-for-different-heatmaps/24207)

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**Author:** [@Noel\_Araujo](https://discourse.julialang.org/u/Noel_Araujo)\
**Replies:** 3\
**Last updated:** [May 14, 2019, 12:57pm UTC](https://discourse.julialang.org/t/different-colors-regions-for-different-heatmaps/24207 "2019-05-14T12:57:25Z")

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Hello internet Basically I’m doing are simple heatmaps with different color limits as in these examples: using Plots pyplot() h1 = heatmap(1:10, 1:15, rand(15,10), clim=(0,0.5)) h2 = heatmap(1:10, 1:15, rand(15,10), cl…

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## [Repeated solution of a parametric rootfinding problem](https://discourse.julialang.org/t/repeated-solution-of-a-parametric-rootfinding-problem/24199)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 2\
**Last updated:** [May 14, 2019, 9:44am UTC](https://discourse.julialang.org/t/repeated-solution-of-a-parametric-rootfinding-problem/24199 "2019-05-14T09:44:10Z")

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For a given set of parameters \\theta, I am solving f(x, \\theta) \\approx 0 numerically for x(\\theta), then obtain simulated moments S(x(\\theta)) (which is stochastic), minimizing \\min\_x \\| S(x(\\theta)) - D \\| where D…

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## [Gradient Descent Optimizer in Flux.jl](https://discourse.julialang.org/t/gradient-descent-optimizer-in-flux-jl/24169)

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**Author:** [@FGerace](https://discourse.julialang.org/u/FGerace)\
**Replies:** 1\
**Last updated:** [May 13, 2019, 5:12pm UTC](https://discourse.julialang.org/t/gradient-descent-optimizer-in-flux-jl/24169 "2019-05-13T17:12:11Z")

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Hello, I’ve recently started using Flux.jl. I’ve seen that Flux provides different kinds of optimizers, such as Descent, ADAM, etc etc… I was just wondering: does the Descent optimizer perform full batch gradient desce…

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## [Optim package in parallel](https://discourse.julialang.org/t/optim-package-in-parallel/24168)

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**Author:** [@drarnau](https://discourse.julialang.org/u/drarnau)\
**Replies:** 0\
**Last updated:** [May 13, 2019, 11:06am UTC](https://discourse.julialang.org/t/optim-package-in-parallel/24168 "2019-05-13T11:06:35Z")

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Does anybody know if it is possible to run the Optim.jl package in parallel? Any example on how to do it?

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## [Separable convolution](https://discourse.julialang.org/t/separable-convolution/24141)

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**Author:** [@Tomas\_Pevny](https://discourse.julialang.org/u/Tomas_Pevny)\
**Replies:** 7\
**Last updated:** [May 13, 2019, 6:15am UTC](https://discourse.julialang.org/t/separable-convolution/24141 "2019-05-13T06:15:27Z")

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Hi All, I would like to run a separate over individual filters. Specifically imagine I have two matrices and I want to convolve each of them with its own filter. And I wonder if it possible to write it as a single convo…

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## [X-axis labels for histograms and violins](https://discourse.julialang.org/t/x-axis-labels-for-histograms-and-violins/24160)

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**Author:** [@rakeshvar](https://discourse.julialang.org/u/rakeshvar)\
**Replies:** 2\
**Last updated:** [May 13, 2019, 5:54am UTC](https://discourse.julialang.org/t/x-axis-labels-for-histograms-and-violins/24160 "2019-05-13T05:54:58Z")

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I have three classes that I want to visualize as a violin plot. I have data as an array or arrays. And names as an array of strings. I want the names to be shown on the x-axis. using StatPlots gr() x = \[rand(9) for i in…

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## [Error "ERROR\_NO\_BINARY\_FOR\_GPU" with CUDAnative.jl/CuArrays.jl](https://discourse.julialang.org/t/error-error-no-binary-for-gpu-with-cudanative-jl-cuarrays-jl/24130)

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**Author:** [@v-i-s-h](https://discourse.julialang.org/u/v-i-s-h)\
**Replies:** 4\
**Last updated:** [May 13, 2019, 3:45am UTC](https://discourse.julialang.org/t/error-error-no-binary-for-gpu-with-cudanative-jl-cuarrays-jl/24130 "2019-05-13T03:45:26Z")

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Hi, I’m trying to install CuArrays.jl. Even though installation finishes without any errors, the tests are failing with the following error message: CUDA error: no kernel image is available for execution on the devic…

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## [Intel MKL with Distributed fails](https://discourse.julialang.org/t/intel-mkl-with-distributed-fails/24053)

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**Author:** [@platawiec](https://discourse.julialang.org/u/platawiec)\
**Replies:** 2\
**Last updated:** [May 12, 2019, 7:29pm UTC](https://discourse.julialang.org/t/intel-mkl-with-distributed-fails/24053 "2019-05-12T19:29:24Z")

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I’m attempting to use Intel MKL over multiple remote workers. I am using KissCluster.jl to set up a lightweight cluster on AWS and a machinefile to configure via addprocs(machines, enable\_threaded\_blas=true, topology=:m…

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## [Is it possible to use BSplines to interpolate when scaling using collection of ranges](https://discourse.julialang.org/t/is-it-possible-to-use-bsplines-to-interpolate-when-scaling-using-collection-of-ranges/24125)

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**Author:** [@jints07](https://discourse.julialang.org/u/jints07)\
**Replies:** 2\
**Last updated:** [May 12, 2019, 2:55pm UTC](https://discourse.julialang.org/t/is-it-possible-to-use-bsplines-to-interpolate-when-scaling-using-collection-of-ranges/24125 "2019-05-12T14:55:10Z")

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I want to use scaled linear interpolation using BSplines with a 4-D matrix. One of the dimensions does not have all points equally spaced but is a 2 ranges put together. I read that BSplines are much faster than Gridded …

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## [Plots (GR backend): animate a moving window](https://discourse.julialang.org/t/plots-gr-backend-animate-a-moving-window/24133)

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**Author:** [@taqtiqa-mark](https://discourse.julialang.org/u/taqtiqa-mark)\
**Replies:** 2\
**Last updated:** [May 12, 2019, 9:10am UTC](https://discourse.julialang.org/t/plots-gr-backend-animate-a-moving-window/24133 "2019-05-12T09:10:20Z")

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Hi, Thank you for all the effort that has been put into the package Plots and the various backend packages. I’ve followed the various examples showing how to animate a plot and save it as a GIF. In the course of thos…

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## [Solving a piecewise linear system](https://discourse.julialang.org/t/solving-a-piecewise-linear-system/18856)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 23\
**Last updated:** [May 12, 2019, 3:06am UTC](https://discourse.julialang.org/t/solving-a-piecewise-linear-system/18856 "2019-05-12T03:06:23Z")

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The help I need here is mostly conceptual, but I suspect that either JuMP.jl or Convex.jl could do this. Any suggestions or pointers to texts/tutorials would be appreciated, I just don’t know how to reformulate this. I …

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## [@threads in array comprehension](https://discourse.julialang.org/t/threads-in-array-comprehension/24072)

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**Author:** [@samo](https://discourse.julialang.org/u/samo)\
**Replies:** 11\
**Last updated:** [May 11, 2019, 3:48pm UTC](https://discourse.julialang.org/t/threads-in-array-comprehension/24072 "2019-05-11T15:48:28Z")

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This is just a feature suggestion. It would be nice it the @threads macro would work also inside array comprehensions as: \[i @threads for i=1:4\] I.e. that example should produce the same result as: julia\> \[i for i=1:4…

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## [CSV.read() deprecated keyword argument](https://discourse.julialang.org/t/csv-read-deprecated-keyword-argument/24095)

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**Author:** [@VincentTam](https://discourse.julialang.org/u/VincentTam)\
**Replies:** 3\
**Last updated:** [May 11, 2019, 9:16am UTC](https://discourse.julialang.org/t/csv-read-deprecated-keyword-argument/24095 "2019-05-11T09:16:41Z")

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In Hayden Klok’s sample code, there’s a deprecated argument for CSV.read(). # from https://github.com/h-Klok/StatsWithJuliaBook/blob/master/1\_chapter/usingR.jl#L3-L5 using CSV, DataFrames, RCall data1 = CSV.read("machin…

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## [How to distribute array by column?](https://discourse.julialang.org/t/how-to-distribute-array-by-column/24091)

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**Author:** [@Carol](https://discourse.julialang.org/u/Carol)\
**Replies:** 4\
**Last updated:** [May 10, 2019, 10:23pm UTC](https://discourse.julialang.org/t/how-to-distribute-array-by-column/24091 "2019-05-10T22:23:46Z")

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Background: using Distributed @everywhere using DistributedArrays addprocs(4) A=\[1 1 2 2; 1 1 2 2; 3 3 4 4; 3 3 4 4\] adist = distribute(A) I found A is distributed in a checkerboard block way, which means f…

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## [Not able to update the canvas of a GR plot within Gtk windows](https://discourse.julialang.org/t/not-able-to-update-the-canvas-of-a-gr-plot-within-gtk-windows/24009)

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**Author:** [@mantzaris](https://discourse.julialang.org/u/mantzaris)\
**Replies:** 15\
**Last updated:** [May 10, 2019, 1:33pm UTC](https://discourse.julialang.org/t/not-able-to-update-the-canvas-of-a-gr-plot-within-gtk-windows/24009 "2019-05-10T13:33:32Z")

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(using Gtk.jl GitHub - JuliaGraphics/Gtk.jl: Julia interface to Gtk windowing toolkit.) I am able to produce a window which has a widget (button) and a canvas which is ‘drawing’ a GR plot. The problem is that on displa…

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## [NetLogo Julia extension](https://discourse.julialang.org/t/netlogo-julia-extension/24023)

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**Author:** [@sbacelar](https://discourse.julialang.org/u/sbacelar)\
**Replies:** 4\
**Last updated:** [May 10, 2019, 10:40am UTC](https://discourse.julialang.org/t/netlogo-julia-extension/24023 "2019-05-10T10:40:45Z")

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Just a suggestion. NetLogo has R , Python and Mathematica extensions. why not create a Julia extension?

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## [Do you actually use FluxML to get work done?](https://discourse.julialang.org/t/do-you-actually-use-fluxml-to-get-work-done/23304)

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**Author:** [@PhilipB](https://discourse.julialang.org/u/PhilipB)\
**Replies:** 16\
**Last updated:** [May 9, 2019, 9:21pm UTC](https://discourse.julialang.org/t/do-you-actually-use-fluxml-to-get-work-done/23304 "2019-05-09T21:21:08Z")

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Hello. I am a student and I am studying tensor methods for deep learning. I decided to try Julia with FluxML yesterday, and so far I met 2 problems of type “FluxML tracked array doesn’t compile when used with this standa…

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## [Optimize not working with function that has find\_zero](https://discourse.julialang.org/t/optimize-not-working-with-function-that-has-find-zero/24043)

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**Author:** [@jints07](https://discourse.julialang.org/u/jints07)\
**Replies:** 11\
**Last updated:** [May 9, 2019, 8:58pm UTC](https://discourse.julialang.org/t/optimize-not-working-with-function-that-has-find-zero/24043 "2019-05-09T20:58:36Z")

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I have been using Julia on and off for over a year now. I know the basics but am not an expert by any means. I have had this problem many times in the past - some problem with forwardDiff not working because of floating …

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## [Resizing Legend Markers in Plots with Matplotlib command](https://discourse.julialang.org/t/resizing-legend-markers-in-plots-with-matplotlib-command/24041)

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**Author:** [@jman87](https://discourse.julialang.org/u/jman87)\
**Replies:** 0\
**Last updated:** [May 9, 2019, 5:25pm UTC](https://discourse.julialang.org/t/resizing-legend-markers-in-plots-with-matplotlib-command/24041 "2019-05-09T17:25:40Z")

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I am using Julia 1.1.0 and plotting images using Plots with PyPlot backend. I need to find a way to make the size of markers in the legend be bigger. This issue has been asked before at least twice: I have found the …

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## [OOM Killer on Linux](https://discourse.julialang.org/t/oom-killer-on-linux/22722)

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**Author:** [@versipellis](https://discourse.julialang.org/u/versipellis)\
**Replies:** 5\
**Last updated:** [May 9, 2019, 3:57pm UTC](https://discourse.julialang.org/t/oom-killer-on-linux/22722 "2019-05-09T15:57:57Z")

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I’m curious if anyone else has run into this. I’m on Ubuntu and trying to run an analysis on some really large datasets (40gigs binary, 1.5billion rows, 1600 chunks) using JuliaDB. I’ve frequently run into the issue whe…

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## [Bayesian Neural Network (Multiclass Classification) in Turing.jl and Flux.jl](https://discourse.julialang.org/t/bayesian-neural-network-multiclass-classification-in-turing-jl-and-flux-jl/21134)

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**Author:** [@alasaadstat](https://discourse.julialang.org/u/alasaadstat)\
**Replies:** 5\
**Last updated:** [May 9, 2019, 3:08pm UTC](https://discourse.julialang.org/t/bayesian-neural-network-multiclass-classification-in-turing-jl-and-flux-jl/21134 "2019-05-09T15:08:01Z")

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I want to do a multiclass classification using Bayesian Neural Network (BNN) in Turing.jl and Flux.jl. There’s a good implementation already of the binary classification using BNN in Turing.jl, check it here. Hence, my g…

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## [How hard would it be to implement Numpy.jl, i.e. Numpy in Julia?](https://discourse.julialang.org/t/how-hard-would-it-be-to-implement-numpy-jl-i-e-numpy-in-julia/22080)

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**Author:** [@Pierre\_Augier](https://discourse.julialang.org/u/Pierre_Augier)\
**Replies:** 71\
**Last updated:** [May 9, 2019, 2:24pm UTC](https://discourse.julialang.org/t/how-hard-would-it-be-to-implement-numpy-jl-i-e-numpy-in-julia/22080 "2019-05-09T14:24:12Z")

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Hi, I’m working with Pythran (http://github.com/serge-sans-paille/pythran), a Python/Numpy to C++ transpiler, which of course supports only a subset of Python (in particular not all the crazy cool Python stuffs stupid f…

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## [Small world index computation](https://discourse.julialang.org/t/small-world-index-computation/24024)

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**Author:** [@pegger0709](https://discourse.julialang.org/u/pegger0709)\
**Replies:** 0\
**Last updated:** [May 9, 2019, 11:57am UTC](https://discourse.julialang.org/t/small-world-index-computation/24024 "2019-05-09T11:57:03Z")

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Hello, I was just wondering whether LightGraphs has a function to compute the small-world index of a graph (like networkx does, but hopefully faster…) Thanks, Philip

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## [How to construct a MetaGraph from a weighted adjacency matrix](https://discourse.julialang.org/t/how-to-construct-a-metagraph-from-a-weighted-adjacency-matrix/23996)

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**Author:** [@pegger0709](https://discourse.julialang.org/u/pegger0709)\
**Replies:** 2\
**Last updated:** [May 9, 2019, 11:41am UTC](https://discourse.julialang.org/t/how-to-construct-a-metagraph-from-a-weighted-adjacency-matrix/23996 "2019-05-09T11:41:58Z")

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Hello, I am a researcher studying structural brain networks of stroke patients. I have some connectomes which are given as symmetric weighted matrices, e.g. (as a random example) julia\> X = rand(300,300); C = Symmetric…

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## [Why do use @spawnat and fetch?](https://discourse.julialang.org/t/why-do-use-spawnat-and-fetch/24014)

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**Author:** [@Carol](https://discourse.julialang.org/u/Carol)\
**Replies:** 3\
**Last updated:** [May 9, 2019, 8:02am UTC](https://discourse.julialang.org/t/why-do-use-spawnat-and-fetch/24014 "2019-05-09T08:02:41Z")

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Hi, I am learning parallel in Julia. And I saw below code of summing an array. Background: using Distributed using DistributedArrays addprocs(4) @everywhere using DistributedArrays a = rand(10^7) adist = distribute(a…

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## [Flux networks as arguments in functions](https://discourse.julialang.org/t/flux-networks-as-arguments-in-functions/23988)

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**Author:** [@charlesll](https://discourse.julialang.org/u/charlesll)\
**Replies:** 6\
**Last updated:** [May 8, 2019, 10:22pm UTC](https://discourse.julialang.org/t/flux-networks-as-arguments-in-functions/23988 "2019-05-08T22:22:25Z")

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Hey, I recently opened an issue on Flux as there is something that needs clarification I think about using Flux with Julia’s functions. To summarize my issue: I have a project where I have various equations embedded in…

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## [JuMP problem with all\_variables](https://discourse.julialang.org/t/jump-problem-with-all-variables/24006)

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**Author:** [@gbustosx](https://discourse.julialang.org/u/gbustosx)\
**Replies:** 2\
**Last updated:** [May 8, 2019, 7:42pm UTC](https://discourse.julialang.org/t/jump-problem-with-all-variables/24006 "2019-05-08T19:42:28Z")

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Hi, I am trying to use all\_variables but I get the following error message: UndefVarError: all\_variables not defined Stacktrace: \[1\] getproperty(::Module, ::Symbol) at ./sysimg.jl:13 \[2\] top-level scope at In\[83\]:1 T…

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## [JuMP 0.18: how to obtain the root relaxation of a branch and cut model?](https://discourse.julialang.org/t/jump-0-18-how-to-obtain-the-root-relaxation-of-a-branch-and-cut-model/23997)

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**Author:** [@mike\_k](https://discourse.julialang.org/u/mike_k)\
**Replies:** 2\
**Last updated:** [May 8, 2019, 3:16pm UTC](https://discourse.julialang.org/t/jump-0-18-how-to-obtain-the-root-relaxation-of-a-branch-and-cut-model/23997 "2019-05-08T15:16:27Z")

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Dear community, as the title suggests, I want to obtain the root relaxation of a branch & cut algorithm. More precisely, if the relaxation is fractional I like to add violated cuts and resolve as long as no violated cut…

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