# Latest

**URL:** https://discourse.julialang.org/latest.md?page=199

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

**Page:** 200

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## [Problem with DifferentialEquations.jl](https://discourse.julialang.org/t/problem-with-differentialequations-jl/127184)

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**Author:** [@Name\_Family\_Name](https://discourse.julialang.org/u/Name_Family_Name)\
**Replies:** 3\
**Last updated:** [March 20, 2025, 6:46pm UTC](https://discourse.julialang.org/t/problem-with-differentialequations-jl/127184 "2025-03-20T18:46:08Z")

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I’m working on a project, which is basically a simulation model for adsorption process of phosphate in waste water (2 videos to understand the adsorption process, it’s 15 seconds in total) So the first is to simulate t…

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## [Can we (easily) share Pluto notebooks on JuliaHub?](https://discourse.julialang.org/t/can-we-easily-share-pluto-notebooks-on-juliahub/60247)

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**Author:** [@maajdl](https://discourse.julialang.org/u/maajdl)\
**Replies:** 3\
**Last updated:** [March 20, 2025, 1:08am UTC](https://discourse.julialang.org/t/can-we-easily-share-pluto-notebooks-on-juliahub/60247 "2025-03-20T01:08:08Z")

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Hello. These days I am obsessed with the idea of sharing Pluto notebooks. For Jupyter notebooks, I found the solution by nextjournal.com quite attracting. For Pluto, Binder looks interresting, based on pluto-on-binder…

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## [Can't build local package](https://discourse.julialang.org/t/cant-build-local-package/127159)

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**Author:** [@lewis](https://discourse.julialang.org/u/lewis)\
**Replies:** 2\
**Last updated:** [March 20, 2025, 3:54pm UTC](https://discourse.julialang.org/t/cant-build-local-package/127159 "2025-03-20T15:54:24Z")

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Here is the error message: (@v1.11) pkg\> build ConvLayer Precompiling project... ✗ ConvLayer 0 dependencies successfully precompiled in 1 seconds. 423 already precompiled. 1 dependency errored. For a report of t…

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## [Why is this code allocating?](https://discourse.julialang.org/t/why-is-this-code-allocating/127175)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 1\
**Last updated:** [March 20, 2025, 2:48pm UTC](https://discourse.julialang.org/t/why-is-this-code-allocating/127175 "2025-03-20T14:48:07Z")

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Why is the following code allocating: using VortexStepMethod # Step 1: Define wing parameters n\_panels = 20 # Number of panels span = 20.0 # Wing span \[m\] chord = 1.0 # Chord length \[m\] v…

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## [Recovery model Tsodyks and Markram with Sindy DataDrivenDiffEq.jl](https://discourse.julialang.org/t/recovery-model-tsodyks-and-markram-with-sindy-datadrivendiffeq-jl/127144)

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**Author:** [@Sergey\_Novak](https://discourse.julialang.org/u/Sergey_Novak)\
**Replies:** 2\
**Last updated:** [March 20, 2025, 2:40pm UTC](https://discourse.julialang.org/t/recovery-model-tsodyks-and-markram-with-sindy-datadrivendiffeq-jl/127144 "2025-03-20T14:40:08Z")

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Hello, is it possible to reconstruct the Tsodyks and Markram model using SINDY? If so, how do you correctly define candidates and what to do with such a nonlinearity as a function g (E, x, u, J, I0) = α \* log (1.0 + exp …

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## [What is the best way to use a config file that stores variables that my module needs](https://discourse.julialang.org/t/what-is-the-best-way-to-use-a-config-file-that-stores-variables-that-my-module-needs/127171)

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**Author:** [@ghadgeabhi](https://discourse.julialang.org/u/ghadgeabhi)\
**Replies:** 2\
**Last updated:** [March 20, 2025, 2:04pm UTC](https://discourse.julialang.org/t/what-is-the-best-way-to-use-a-config-file-that-stores-variables-that-my-module-needs/127171 "2025-03-20T14:04:20Z")

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Having some issues and not finding the right way to add config files to my module. I have a lot of variables that change a lot when using my module and config files are the best way to do this. I would like to know how …

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## [WebSocket and HTTP fails silently](https://discourse.julialang.org/t/websocket-and-http-fails-silently/127109)

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**Author:** [@\_admin](https://discourse.julialang.org/u/_admin)\
**Replies:** 5\
**Last updated:** [March 20, 2025, 12:19pm UTC](https://discourse.julialang.org/t/websocket-and-http-fails-silently/127109 "2025-03-20T12:19:50Z")

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Straight to the code, HTTP and WebSocket in Julia can’t establish a connection. It seem to be a general error with Julia or the package. I’m using the latest versions on mac. julia version 1.11.4 Minimal Example using…

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## [Bug in symbolic\_solve and symbolic\_linear\_solve](https://discourse.julialang.org/t/bug-in-symbolic-solve-and-symbolic-linear-solve/127157)

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**Author:** [@CiccioPasticcio](https://discourse.julialang.org/u/CiccioPasticcio)\
**Replies:** 1\
**Last updated:** [March 20, 2025, 7:44am UTC](https://discourse.julialang.org/t/bug-in-symbolic-solve-and-symbolic-linear-solve/127157 "2025-03-20T07:44:41Z")

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Is this a bug? julia\> symbolic\_solve(x+im,x) 1-element Vector{Complex{Int64}}: 0 - 1im julia\> symbolic\_solve(x+im~0,x) 1-element Vector{Int64}: 0 julia\> symbolic\_solve(x^2+im~1,x) 2-element Vector{BigInt}: -1 1 …

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## [Python downstream testing, can't figure out CI to install the libraries?](https://discourse.julialang.org/t/python-downstream-testing-cant-figure-out-ci-to-install-the-libraries/127153)

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**Author:** [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Replies:** 4\
**Last updated:** [March 20, 2025, 7:44am UTC](https://discourse.julialang.org/t/python-downstream-testing-cant-figure-out-ci-to-install-the-libraries/127153 "2025-03-20T07:44:10Z")

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For our diffeqpy library, we used to have downstream testing setup in SciMLBase.jl so that way our core changes wouldn’t break the core functionality when accessed through Python. However, it’s not working now after the …

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## [Threads are not speeding up computation a lot](https://discourse.julialang.org/t/threads-are-not-speeding-up-computation-a-lot/126305)

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**Author:** [@Nyan](https://discourse.julialang.org/u/Nyan)\
**Replies:** 70\
**Last updated:** [March 20, 2025, 6:00am UTC](https://discourse.julialang.org/t/threads-are-not-speeding-up-computation-a-lot/126305 "2025-03-20T06:00:03Z")

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Hi. I googled and read many things about this topic, but cannot figure up what is the problem, and why I see no meaningful speedup for my code. My code: module Keygen using Base.Threads using Base.Iterators include("./…

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## [Unable to use AMDGPU.jl on RX6600](https://discourse.julialang.org/t/unable-to-use-amdgpu-jl-on-rx6600/126889)

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**Author:** [@bpsomu](https://discourse.julialang.org/u/bpsomu)\
**Replies:** 13\
**Last updated:** [March 19, 2025, 10:40pm UTC](https://discourse.julialang.org/t/unable-to-use-amdgpu-jl-on-rx6600/126889 "2025-03-19T22:40:15Z")

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I am trying to use AMDGPU.jl but it installs with several errors and does not work. Operating Systems: Fedora and Endeavor OS Julia version: 1.11.4 installed via the curl command on the Julia website julia\> using AMDG…

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## [MLStyle - are recursive ADTs possible](https://discourse.julialang.org/t/mlstyle-are-recursive-adts-possible/127083)

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**Author:** [@jonoke](https://discourse.julialang.org/u/jonoke)\
**Replies:** 10\
**Last updated:** [March 19, 2025, 9:05pm UTC](https://discourse.julialang.org/t/mlstyle-are-recursive-adts-possible/127083 "2025-03-19T21:05:32Z")

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Hi, I’m playing around with MLStyle but can’t seem to get a definition for a cons list to work. If I try: @data XX{T} begin Nil Cons(hd::T, tl::XX{T}) end I get: ERROR: LoadError: Defining generic enum Nil \<:…

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## [Reactant cannot find GPU device](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124)

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**Author:** [@Tomas\_Pevny](https://discourse.julialang.org/u/Tomas_Pevny)\
**Replies:** 2\
**Last updated:** [March 19, 2025, 8:09pm UTC](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124 "2025-03-19T20:09:02Z")

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I have an old server with two GPUs (TITAN Xp, and RTX 2080). I am using that mostly for developing an playing. Now, I wanted to compare the speed of Lux with CUDA and with Reactant, but the reactant library cannot find …

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## [Select specific elements from each column of a matrix in julia](https://discourse.julialang.org/t/select-specific-elements-from-each-column-of-a-matrix-in-julia/127138)

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**Author:** [@alex180500](https://discourse.julialang.org/u/alex180500)\
**Replies:** 4\
**Last updated:** [March 19, 2025, 6:24pm UTC](https://discourse.julialang.org/t/select-specific-elements-from-each-column-of-a-matrix-in-julia/127138 "2025-03-19T18:24:16Z")

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Let’s say I have this 16x1000 matrix: test\_mat = rand(16, 1000) And I have these indices: test\_indices = rand(1:16, 4, 1000) I want to extract from test\_mat a 4x1000 matrix where the indices of the row are represente…

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## [PrettyTables.jl + Makie.jl](https://discourse.julialang.org/t/prettytables-jl-makie-jl/66707)

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**Author:** [@bicepjai](https://discourse.julialang.org/u/bicepjai)\
**Replies:** 7\
**Last updated:** [March 19, 2025, 5:13pm UTC](https://discourse.julialang.org/t/prettytables-jl-makie-jl/66707 "2025-03-19T17:13:18Z")

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Will it be possible to insert https://github.com/ronisbr/PrettyTables.jl on an axis ?

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## [Floops multithreading HasBoxedVariableError](https://discourse.julialang.org/t/floops-multithreading-hasboxedvariableerror/127139)

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**Author:** [@s\_amap](https://discourse.julialang.org/u/s_amap)\
**Replies:** 7\
**Last updated:** [March 19, 2025, 3:54pm UTC](https://discourse.julialang.org/t/floops-multithreading-hasboxedvariableerror/127139 "2025-03-19T15:54:34Z")

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I’ve been trying to adjust a parallel loop after some changes, and I need some clarification to make sure I’m not at risk of false sharing. The loop conceptually works like this: object # holds a state, which is a tupl…

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## [Help -- can't get Turing to work on a simple model](https://discourse.julialang.org/t/help-cant-get-turing-to-work-on-a-simple-model/122107)

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**Author:** [@anprasad](https://discourse.julialang.org/u/anprasad)\
**Replies:** 6\
**Last updated:** [March 19, 2025, 2:50pm UTC](https://discourse.julialang.org/t/help-cant-get-turing-to-work-on-a-simple-model/122107 "2025-03-19T14:50:34Z")

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Hi everyone, I’m new to Bayesian inference and Turing, so I realize that this is likely user error more than anything. I’m trying to fit a simple model; I’ve tried two versions here @model function model1(samples) …

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## [What is the best way to include sample data in Package for CI and precompilation](https://discourse.julialang.org/t/what-is-the-best-way-to-include-sample-data-in-package-for-ci-and-precompilation/127094)

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**Author:** [@lupemba](https://discourse.julialang.org/u/lupemba)\
**Replies:** 2\
**Last updated:** [March 19, 2025, 2:38pm UTC](https://discourse.julialang.org/t/what-is-the-best-way-to-include-sample-data-in-package-for-ci-and-precompilation/127094 "2025-03-19T14:38:46Z")

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I am working on MetopDatasets.jl and I want to includes some sample data for CI tests and precompilation. How can I include sample data in packages and still keep the size of the repository down? I am considering to use…

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## [DAEProblem and ModelingToolkit.jl](https://discourse.julialang.org/t/daeproblem-and-modelingtoolkit-jl/127097)

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**Author:** [@Bart\_van\_de\_Lint](https://discourse.julialang.org/u/Bart_van_de_Lint)\
**Replies:** 4\
**Last updated:** [March 19, 2025, 11:56am UTC](https://discourse.julialang.org/t/daeproblem-and-modelingtoolkit-jl/127097 "2025-03-19T11:56:31Z")

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I am a bit confused: should we use DAEProblem(sys, du0, u0, tspan) or ODEProblem(sys, u0, tspan) from a differential-algebraic system using ModelingToolkit? Using ODEProblem does work in my case, but then I cannot use DA…

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## [Understanding GC time](https://discourse.julialang.org/t/understanding-gc-time/127127)

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**Author:** [@pjuergens](https://discourse.julialang.org/u/pjuergens)\
**Replies:** 1\
**Last updated:** [March 19, 2025, 11:51am UTC](https://discourse.julialang.org/t/understanding-gc-time/127127 "2025-03-19T11:51:14Z")

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Hello together, I am wondering what determines the time that the garbage collector needs. I have a complex simulation where I was hunting down allocations, but surprisingly even though I could heavily reduce number and …

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## [PhD Position at Airbus in Munich, Germany](https://discourse.julialang.org/t/phd-position-at-airbus-in-munich-germany/126536)

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**Author:** [@kschertler](https://discourse.julialang.org/u/kschertler)\
**Replies:** 1\
**Last updated:** [March 19, 2025, 10:49am UTC](https://discourse.julialang.org/t/phd-position-at-airbus-in-munich-germany/126536 "2025-03-19T10:49:14Z")

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Dear Julians, I am happy to announce that we are seeking a motivated PhD candidate to join our AI team at Airbus Central R&T in Munich, Germany. If you enjoy working with Julia, this could be a great fit! The core obje…

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## [Using filter in Poisson solver](https://discourse.julialang.org/t/using-filter-in-poisson-solver/127129)

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**Author:** [@Sagar\_123](https://discourse.julialang.org/u/Sagar_123)\
**Replies:** 0\
**Last updated:** [March 19, 2025, 10:05am UTC](https://discourse.julialang.org/t/using-filter-in-poisson-solver/127129 "2025-03-19T10:05:36Z")

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Hello! I am trying to implement a filter on poisson solver matrix for periodic grid. So, I have x and y grid where y is periodic, hence I can decouple in y using fft. Now, if I were to apply a filter around a particular …

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## [Turing.jl + Enyzme Examples](https://discourse.julialang.org/t/turing-jl-enyzme-examples/121606)

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**Author:** [@joshualeond](https://discourse.julialang.org/u/joshualeond)\
**Replies:** 4\
**Last updated:** [March 19, 2025, 9:48am UTC](https://discourse.julialang.org/t/turing-jl-enyzme-examples/121606 "2025-03-19T09:48:19Z")

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Hi there, are there any working examples of using Turing.jl with the Enzyme.jl AD backend? I’ve seen several Github issues like this one but I think they may be outdated at this point. Also the following Discourse topic…

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## [A proper introduction on how to update julia somewhere accessible?](https://discourse.julialang.org/t/a-proper-introduction-on-how-to-update-julia-somewhere-accessible/28166)

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**Author:** [@Torkel](https://discourse.julialang.org/u/Torkel)\
**Replies:** 14\
**Last updated:** [March 19, 2025, 9:44am UTC](https://discourse.julialang.org/t/a-proper-introduction-on-how-to-update-julia-somewhere-accessible/28166 "2025-03-19T09:44:48Z")

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So I recently had to update Julia. After some hand-holding from a colleague it worked out. I’ve had to do this two times before, the first time it worked out fine after someone at JuliaCon did it for me. The second time …

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## [Sometimes gc error?](https://discourse.julialang.org/t/sometimes-gc-error/127080)

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**Author:** [@leonie25](https://discourse.julialang.org/u/leonie25)\
**Replies:** 9\
**Last updated:** [March 19, 2025, 8:34am UTC](https://discourse.julialang.org/t/sometimes-gc-error/127080 "2025-03-19T08:34:28Z")

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Modeling with jump, same code, most of the time it works fine, sometimes it reports errors like below: gc\_setmark\_pool\_ at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honey…

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## [About implementing a shared Julia environment for HPC clusters at CSC](https://discourse.julialang.org/t/about-implementing-a-shared-julia-environment-for-hpc-clusters-at-csc/112217)

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**Author:** [@jaantollander](https://discourse.julialang.org/u/jaantollander)\
**Replies:** 1\
**Last updated:** [March 19, 2025, 7:44am UTC](https://discourse.julialang.org/t/about-implementing-a-shared-julia-environment-for-hpc-clusters-at-csc/112217 "2025-03-19T07:44:37Z")

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Hello! I’m working at CSC, an HPC center in Finland, and I have been installing a shared Julia environment to our HPC clusters (Puhti, Mahti, and LUMI). These clusters use Lmod for module environments and Slurm as the wo…

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## [Rewrite a for loop using dot](https://discourse.julialang.org/t/rewrite-a-for-loop-using-dot/127099)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 4\
**Last updated:** [March 19, 2025, 6:22am UTC](https://discourse.julialang.org/t/rewrite-a-for-loop-using-dot/127099 "2025-03-19T06:22:11Z")

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Hi, there. I’m not sure if I can equivalently rewrite a for-loop, with the help of the dot syntax. Here “equivalently” is in terms of both the logical executing sequence, and performance. When looking at the code, the …

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## [What can and cannot be in a C-callback?](https://discourse.julialang.org/t/what-can-and-cannot-be-in-a-c-callback/126840)

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**Author:** [@ejmeitz](https://discourse.julialang.org/u/ejmeitz)\
**Replies:** 13\
**Last updated:** [March 18, 2025, 11:03pm UTC](https://discourse.julialang.org/t/what-can-and-cannot-be-in-a-c-callback/126840 "2025-03-18T23:03:14Z")

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I’ve been messing around with registering callbacks in a C-library from Julia and ran into some things I cannot explain. The main thing I do not understand is that my code works fine from a Julia script that I either run…

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## [Which are now the mainstream technological stacks to implement web sites?](https://discourse.julialang.org/t/which-are-now-the-mainstream-technological-stacks-to-implement-web-sites/127114)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 2\
**Last updated:** [March 18, 2025, 10:22pm UTC](https://discourse.julialang.org/t/which-are-now-the-mainstream-technological-stacks-to-implement-web-sites/127114 "2025-03-18T22:22:12Z")

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At the beginning, for what I recall, there were Microsoft FrontPage, Netscape Composer and Adobe Flash. Then arrived the era of the one-function scripts, first in Perl, then in PHP, then the CMSs in PHP and C hash / C ne…

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## [FE Discretisation for embedded cables](https://discourse.julialang.org/t/fe-discretisation-for-embedded-cables/127025)

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**Author:** [@Br0BOLE](https://discourse.julialang.org/u/Br0BOLE)\
**Replies:** 13\
**Last updated:** [March 18, 2025, 10:12pm UTC](https://discourse.julialang.org/t/fe-discretisation-for-embedded-cables/127025 "2025-03-18T22:12:38Z")

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Hi there, I’m trying to automate the discritization of FE meshes for High voltage cables embedded in the ground. This is to conduct thermal analysis and parameterise the geometry of the cable (cables with tri cores). I…

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