# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=461

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**Page:** 462

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## [Axis label skewed and wrongly positioned when setting guidefont](https://discourse.julialang.org/t/axis-label-skewed-and-wrongly-positioned-when-setting-guidefont/35116)

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**Author:** [@mlanghinrichs](https://discourse.julialang.org/u/mlanghinrichs)\
**Replies:** 0\
**Last updated:** [February 25, 2020, 2:24pm UTC](https://discourse.julialang.org/t/axis-label-skewed-and-wrongly-positioned-when-setting-guidefont/35116 "2020-02-25T14:24:58Z")

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Hi all, I noticed that my x axis label is somehow weirdly positioned and rotated when setting a particular font as guidefont (plot p2). I’m using the Plots.jl package with the GR backend. In case I don’t set the guidefo…

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## [Why zip the data argument to the \`Flux::train!\` function?](https://discourse.julialang.org/t/why-zip-the-data-argument-to-the-flux-train-function/35024)

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**Author:** [@arnaudmgh](https://discourse.julialang.org/u/arnaudmgh)\
**Replies:** 6\
**Last updated:** [February 25, 2020, 5:10am UTC](https://discourse.julialang.org/t/why-zip-the-data-argument-to-the-flux-train-function/35024 "2020-02-25T05:10:44Z")

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I have been playing with the model zoo autoencoder code. I have a question about this line of code: @epochs 10 Flux.train!(loss, params(m), zip(data), opt, cb = evalcb) (permalink) What is zip(data) doing to the data,…

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## [\[ANN\] New package: Strapping.jl](https://discourse.julialang.org/t/ann-new-package-strapping-jl/35038)

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**Author:** [@quinnj](https://discourse.julialang.org/u/quinnj)\
**Replies:** 9\
**Last updated:** [February 25, 2020, 4:38am UTC](https://discourse.julialang.org/t/ann-new-package-strapping-jl/35038 "2020-02-25T04:38:04Z")

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I’ve been playing around with some “ORM” ideas for a bit in different ways, trying to find a good balance of “not-too-magical”, but still useful. I feel the design has finally come together well enough that I’d like to …

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## [JuMP 0.21. How to stop the solver in callback?](https://discourse.julialang.org/t/jump-0-21-how-to-stop-the-solver-in-callback/35028)

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**Author:** [@mike\_k](https://discourse.julialang.org/u/mike_k)\
**Replies:** 1\
**Last updated:** [February 25, 2020, 4:21am UTC](https://discourse.julialang.org/t/jump-0-21-how-to-stop-the-solver-in-callback/35028 "2020-02-25T04:21:20Z")

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Dear community, in older JuMP versions, one was able to stop the solving process in a callback with JuMP.StopTheSolver. However, I did not find something similar in the documentation of the current release 0.21. Do have…

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## [NLopt failed due to Forced Stop](https://discourse.julialang.org/t/nlopt-failed-due-to-forced-stop/34364)

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**Author:** [@Fisheryu1234](https://discourse.julialang.org/u/Fisheryu1234)\
**Replies:** 3\
**Last updated:** [February 24, 2020, 11:47pm UTC](https://discourse.julialang.org/t/nlopt-failed-due-to-forced-stop/34364 "2020-02-24T23:47:06Z")

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Hi, I encountered a rather complicated constrained maximum likelihood estimation The constraint is numerically solved from a large-scale nonlinear fixed-point problem given primitive parameters (12,800 equality constrai…

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## [Lotka\_Volterra tutorial](https://discourse.julialang.org/t/lotka-volterra-tutorial/35077)

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**Author:** [@erlebach](https://discourse.julialang.org/u/erlebach)\
**Replies:** 11\
**Last updated:** [February 24, 2020, 8:23pm UTC](https://discourse.julialang.org/t/lotka-volterra-tutorial/35077 "2020-02-24T20:23:08Z")

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Hi, I tried the first tutorial: "Optimizing parameters of an ODE for an Optimal Control Problem. I executed all the functions up to and including "p = \[1.5, 1.0, 3.0, 1.0\]. Then I typed: prob = ODEProblem(lotka\_volterr…

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## [Differential Equations General Questions](https://discourse.julialang.org/t/differential-equations-general-questions/34949)

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**Author:** [@alewolf](https://discourse.julialang.org/u/alewolf)\
**Replies:** 11\
**Last updated:** [February 24, 2020, 7:14pm UTC](https://discourse.julialang.org/t/differential-equations-general-questions/34949 "2020-02-24T19:14:53Z")

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Hi there - I had some complete package to work with differential equations montecarlo simulations. It seems that differentialequations montecarlo is not longer supported? Is differentialequations enesmble a replacemen…

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## [\[ANN\] SatelliteToolbox.jl v0.7.0 =\> IGRFv13 and RV to TLE conversion](https://discourse.julialang.org/t/ann-satellitetoolbox-jl-v0-7-0-igrfv13-and-rv-to-tle-conversion/35060)

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**Author:** [@Ronis\_BR](https://discourse.julialang.org/u/Ronis_BR)\
**Replies:** 0\
**Last updated:** [February 24, 2020, 1:42am UTC](https://discourse.julialang.org/t/ann-satellitetoolbox-jl-v0-7-0-igrfv13-and-rv-to-tle-conversion/35060 "2020-02-24T01:42:51Z")

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Hi! I have just registered a new version of SatelliteToolbox.jl (v0.7.0). It was supposed to be a somewhat small release. However, I decided to make a huge change in some parts because I was using a very old way of pro…

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## [Taking panel and temporal data seriously](https://discourse.julialang.org/t/taking-panel-and-temporal-data-seriously/35050)

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**Author:** [@Nosferican](https://discourse.julialang.org/u/Nosferican)\
**Replies:** 11\
**Last updated:** [February 23, 2020, 8:24pm UTC](https://discourse.julialang.org/t/taking-panel-and-temporal-data-seriously/35050 "2020-02-23T20:24:13Z")

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This discussion is about how to best implement a context for tabular data that generalizes to cross-sectional and temporal dimensions. For example, subject period value 1 1 0 1 2 3 1 3 …

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## [Error while installing NEOS.jl](https://discourse.julialang.org/t/error-while-installing-neos-jl/35041)

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**Author:** [@Deb\_Midya](https://discourse.julialang.org/u/Deb_Midya)\
**Replies:** 3\
**Last updated:** [February 23, 2020, 5:09am UTC](https://discourse.julialang.org/t/error-while-installing-neos-jl/35041 "2020-02-23T05:09:03Z")

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I’m using Julia-1.3.1 on Windows 64. To install NEOS.jl, I’ve used the followings: Julia\>import Pkg Julia\>Pkg.add(“NEOS.jl”) ERROR: The following package names could not be resolved: NOES.jl (not found in project, m…

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## [CUDA verbose mode off](https://discourse.julialang.org/t/cuda-verbose-mode-off/34930)

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**Author:** [@Ferran\_Mazzanti](https://discourse.julialang.org/u/Ferran_Mazzanti)\
**Replies:** 1\
**Last updated:** [February 20, 2020, 6:42pm UTC](https://discourse.julialang.org/t/cuda-verbose-mode-off/34930 "2020-02-20T18:42:02Z")

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Hi folks, sometimes I find that my CUDA functions display this message ┌ Warning: Performing scalar operations on GPU arrays: This is very slow, consider disallowing these operations with \`allowscalar(false)\` └ @ GPUAr…

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## [\[Bug?\] JuMP.read\_from\_file+Cbc gives infeasible, just Cbc gives feasible](https://discourse.julialang.org/t/bug-jump-read-from-file-cbc-gives-infeasible-just-cbc-gives-feasible/34990)

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**Author:** [@Henrique\_Becker](https://discourse.julialang.org/u/Henrique_Becker)\
**Replies:** 3\
**Last updated:** [February 22, 2020, 4:50am UTC](https://discourse.julialang.org/t/bug-jump-read-from-file-cbc-gives-infeasible-just-cbc-gives-feasible/34990 "2020-02-22T04:50:46Z")

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I found the problem without using the read\_from\_file (i.e., it arose from a model built inside Julia, but the code to generate the model is long) in the corner case where the model is kinda empty but not really. The mode…

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## [Programmaticly build expression for JuMP NLconstraint](https://discourse.julialang.org/t/programmaticly-build-expression-for-jump-nlconstraint/34950)

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**Author:** [@jacob-roth](https://discourse.julialang.org/u/jacob-roth)\
**Replies:** 2\
**Last updated:** [February 21, 2020, 1:28am UTC](https://discourse.julialang.org/t/programmaticly-build-expression-for-jump-nlconstraint/34950 "2020-02-21T01:28:06Z")

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I’m trying to define a nonlinear constraint programmatically via expressions. Specifically, I have a function f that takes in arguments x (a JuMP Variable), i (the index of the variable), and p (some parameters). The rea…

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## [Best way to implement shortcut connections for feed-forward neural networks in Flux.jl](https://discourse.julialang.org/t/best-way-to-implement-shortcut-connections-for-feed-forward-neural-networks-in-flux-jl/10633)

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**Author:** [@Azamat](https://discourse.julialang.org/u/Azamat)\
**Replies:** 10\
**Last updated:** [February 21, 2020, 3:19pm UTC](https://discourse.julialang.org/t/best-way-to-implement-shortcut-connections-for-feed-forward-neural-networks-in-flux-jl/10633 "2020-02-21T15:19:32Z")

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Using Flux.jl, I would like to build Feed-Forward Neural Network, but with shortcut connections like those found in ResNet. What would be the best way to do this? I know that something like Chain(Dense(10, 5, relu), Den…

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## [StructuredOptimization.jl : parsing issue when adding constraints](https://discourse.julialang.org/t/structuredoptimization-jl-parsing-issue-when-adding-constraints/34411)

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**Author:** [@rpetit](https://discourse.julialang.org/u/rpetit)\
**Replies:** 8\
**Last updated:** [February 21, 2020, 1:50pm UTC](https://discourse.julialang.org/t/structuredoptimization-jl-parsing-issue-when-adding-constraints/34411 "2020-02-21T13:50:49Z")

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Hi, I’m trying to solve a modified LASSO where weights are constrained to be nonnegative, using StructuredOptimization.jl. The documentation suggests this should be possible using a code similar to the one below : usin…

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## [Aggregated Binary Data in MixedModels](https://discourse.julialang.org/t/aggregated-binary-data-in-mixedmodels/34919)

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**Author:** [@talat](https://discourse.julialang.org/u/talat)\
**Replies:** 1\
**Last updated:** [February 21, 2020, 9:03am UTC](https://discourse.julialang.org/t/aggregated-binary-data-in-mixedmodels/34919 "2020-02-21T09:03:29Z")

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Hello all, I’m trying to fit a generalized linear mixed model using the MixedModels package. It works fine as long as I use “normal” binary data i.e. response vector is simply 0/1 and each observartion is one row. I wou…

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## [Open Source Energy Optimization JuMP Model: REopt Lite](https://discourse.julialang.org/t/open-source-energy-optimization-jump-model-reopt-lite/34934)

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**Author:** [@JosiahPohl](https://discourse.julialang.org/u/JosiahPohl)\
**Replies:** 1\
**Last updated:** [February 21, 2020, 11:05am UTC](https://discourse.julialang.org/t/open-source-energy-optimization-jump-model-reopt-lite/34934 "2020-02-21T11:05:47Z")

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My team at the National Renewable Energy Laboratory (NREL) recently converted the optimization engine for the REopt Lite Web Tool from Mosel to JuMP and open-sourced the whole API. Would love for you to check it and feel…

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## [Flux failing on GPU](https://discourse.julialang.org/t/flux-failing-on-gpu/18948)

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**Author:** [@jcreinhold](https://discourse.julialang.org/u/jcreinhold)\
**Replies:** 25\
**Last updated:** [February 21, 2020, 8:00am UTC](https://discourse.julialang.org/t/flux-failing-on-gpu/18948 "2020-02-21T08:00:01Z")

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Hello all, I’ve been trying to get up and running with Flux to create some DNNs in Julia, but I’ve been running into some issues with getting CUDA working with Flux. I have some preliminary work in this notebook. I tri…

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## [\[RFC\] Maker Project Example and Template](https://discourse.julialang.org/t/rfc-maker-project-example-and-template/34882)

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**Author:** [@anon92994695](https://discourse.julialang.org/u/anon92994695)\
**Replies:** 0\
**Last updated:** [February 19, 2020, 11:59pm UTC](https://discourse.julialang.org/t/rfc-maker-project-example-and-template/34882 "2020-02-19T23:59:07Z")

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Really sorry for the delay in getting this thing lifted off the ground everyone. I’m holding down a lot of things, hit a rough patch, but I bounced back :). Anyways, I made an example project which I want some advice on…

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## [Passing constructed closures to child processes](https://discourse.julialang.org/t/passing-constructed-closures-to-child-processes/34723)

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**Author:** [@platawiec](https://discourse.julialang.org/u/platawiec)\
**Replies:** 3\
**Last updated:** [February 20, 2020, 9:02pm UTC](https://discourse.julialang.org/t/passing-constructed-closures-to-child-processes/34723 "2020-02-20T21:02:04Z")

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I am performing a distributed calculation via pmap. For context, I have some expensive model which I need to differentiate, and for this I’ve chosen Zygote. Part of the process is defining an “adjoint” for pmap. I have f…

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## [BayesNets Structure Learning Exception](https://discourse.julialang.org/t/bayesnets-structure-learning-exception/34849)

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**Author:** [@rsteckel](https://discourse.julialang.org/u/rsteckel)\
**Replies:** 3\
**Last updated:** [February 20, 2020, 5:43pm UTC](https://discourse.julialang.org/t/bayesnets-structure-learning-exception/34849 "2020-02-20T17:43:27Z")

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I’ve been trying out the BayesNets.jl package. I would like to learn the structure of a bayesian network using a small number of Bool variables in a DataFrame. First, I set the parameters of the search data = CSV.read(…

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## [Error when trying to install Julia on Google Colaboratory](https://discourse.julialang.org/t/error-when-trying-to-install-julia-on-google-colaboratory/21624)

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**Author:** [@askvorts](https://discourse.julialang.org/u/askvorts)\
**Replies:** 7\
**Last updated:** [February 20, 2020, 5:13pm UTC](https://discourse.julialang.org/t/error-when-trying-to-install-julia-on-google-colaboratory/21624 "2020-02-20T17:13:11Z")

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I am trying to install Julia on Google Colaboratory and getting the following error Updating \`~/.julia/environments/v1.0/Project.toml\` \[3a865a2d\] + CuArrays v0.9.1 Updating \`~/.julia/environments/v1.0/Manifest.toml\`…

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## [PackageCompiler.jl complaining that MbedTLS.jl might not be relocatable](https://discourse.julialang.org/t/packagecompiler-jl-complaining-that-mbedtls-jl-might-not-be-relocatable/34878)

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**Author:** [@kevin.squire](https://discourse.julialang.org/u/kevin.squire)\
**Replies:** 5\
**Last updated:** [February 20, 2020, 4:47pm UTC](https://discourse.julialang.org/t/packagecompiler-jl-complaining-that-mbedtls-jl-might-not-be-relocatable/34878 "2020-02-20T16:47:12Z")

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Hi, I’m trying to use PackageCompiler.jl with a project that uses HTTP.jl (which depends on MbedTLS.jl), and it’s complaining that MbedTLS.jl is not relocatable (and the program also crashes, although I haven’t convince…

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## [@NLexpression with JuMP 0.21](https://discourse.julialang.org/t/nlexpression-with-jump-0-21/34859)

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**Author:** [@amontoison](https://discourse.julialang.org/u/amontoison)\
**Replies:** 4\
**Last updated:** [February 20, 2020, 4:01pm UTC](https://discourse.julialang.org/t/nlexpression-with-jump-0-21/34859 "2020-02-20T16:01:58Z")

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I tried to use an old JuMP model that was working with JuMP 0.18. But the behaviour of @NLexpression changed with JuMP 0.19 /0.20 / 0.21. Is it a bug or I need to modify how the expression is written? Thank you in adva…

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## [I am new to learning GPU, I do n’t know how to put it in GPU for the 4 loops here, I hope I can get help](https://discourse.julialang.org/t/i-am-new-to-learning-gpu-i-do-n-t-know-how-to-put-it-in-gpu-for-the-4-loops-here-i-hope-i-can-get-help/34904)

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**Author:** [@11125](https://discourse.julialang.org/u/11125)\
**Replies:** 0\
**Last updated:** [February 20, 2020, 1:44pm UTC](https://discourse.julialang.org/t/i-am-new-to-learning-gpu-i-do-n-t-know-how-to-put-it-in-gpu-for-the-4-loops-here-i-hope-i-can-get-help/34904 "2020-02-20T13:44:58Z")

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''' using CuArrays,CUDAnative,CUDAdrv,BenchmarkTools N = 3 M = 100 k = ones(N,N)\*5 the =range(0,pi/2,length=M) ph = range(0,2\*pi,length=M) theta = CuArrays.repeat(the,1,M)' phi = CuArrays.repeat(ph,1,M) aa = range(-5…

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## [Issue with the incompressible elasticity example of JuAFEM package](https://discourse.julialang.org/t/issue-with-the-incompressible-elasticity-example-of-juafem-package/34814)

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**Author:** [@Leooop](https://discourse.julialang.org/u/Leooop)\
**Replies:** 3\
**Last updated:** [February 20, 2020, 12:33pm UTC](https://discourse.julialang.org/t/issue-with-the-incompressible-elasticity-example-of-juafem-package/34814 "2020-02-20T12:33:08Z")

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Hi, I plan to use the JuAFEM package as a basis for my phd work dealing with brittle damage modeling. First of all, I would like to thank the authors(@kristoffer.carlsson et @fredrikekre) for this beautifully written p…

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## [Using Julia on XSEDE](https://discourse.julialang.org/t/using-julia-on-xsede/34824)

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**Author:** [@Yifan\_Liu](https://discourse.julialang.org/u/Yifan_Liu)\
**Replies:** 3\
**Last updated:** [February 20, 2020, 11:29am UTC](https://discourse.julialang.org/t/using-julia-on-xsede/34824 "2020-02-20T11:29:59Z")

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I recently came across this project called XSEDE (Extreme Science and Engineering Discovery Environment) and was wondering if anyone has experience using Julia on this platform. Is it good for both data-intensive and com…

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## [Sigmoid function in optimization problem](https://discourse.julialang.org/t/sigmoid-function-in-optimization-problem/34868)

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**Author:** [@GiuliaM](https://discourse.julialang.org/u/GiuliaM)\
**Replies:** 2\
**Last updated:** [February 20, 2020, 10:41am UTC](https://discourse.julialang.org/t/sigmoid-function-in-optimization-problem/34868 "2020-02-20T10:41:31Z")

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Hi! I’m using Ipopt to solve a NL optimization problem. I need binary variables but I’m using a sigmoid to avoid transforming my problem into a MINLP. I made a MWE in which there are two variables (x1 and x2). The sig…

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## [3D Mandelbrot Set visualization](https://discourse.julialang.org/t/3d-mandelbrot-set-visualization/34148)

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**Author:** [@Skoffer](https://discourse.julialang.org/u/Skoffer)\
**Replies:** 5\
**Last updated:** [February 20, 2020, 7:22am UTC](https://discourse.julialang.org/t/3d-mandelbrot-set-visualization/34148 "2020-02-20T07:22:07Z")

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May be a little off topic, but I saw this beautiful video This equation will change how you see the world (the logistic map) - YouTube and was wondering, is it possible to draw something like this in Julia? May be in Mak…

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## [JuMP 0.21 is released](https://discourse.julialang.org/t/jump-0-21-is-released/34808)

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**Author:** [@miles.lubin](https://discourse.julialang.org/u/miles.lubin)\
**Replies:** 8\
**Last updated:** [February 19, 2020, 10:44pm UTC](https://discourse.julialang.org/t/jump-0-21-is-released/34808 "2020-02-19T22:44:24Z")

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tl;dr: Callbacks are back! Lots of new features. with\_optimizer is deprecated. Reminder: The deadline to submit talk proposals for JuMP-dev 2020 is February 29th.

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