# Latest

**URL:** https://discourse.julialang.org/latest.md?page=213

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

**Page:** 214

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## [Matrices and tensors with Symbolics.jl](https://discourse.julialang.org/t/matrices-and-tensors-with-symbolics-jl/119394)

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**Author:** [@Damiano](https://discourse.julialang.org/u/Damiano)\
**Replies:** 6\
**Last updated:** [February 25, 2025, 1:29pm UTC](https://discourse.julialang.org/t/matrices-and-tensors-with-symbolics-jl/119394 "2025-02-25T13:29:04Z")

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Hi all, three quick issues I encountered. Please correct me if I should have created different topics of if the Category is wrong. Best way to create a symmetric matrix This is the best I could come up with. A = Ar…

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## [Julia/ SearchLight.Migrations , how to add foreign key?](https://discourse.julialang.org/t/julia-searchlight-migrations-how-to-add-foreign-key/126292)

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**Author:** [@andreh](https://discourse.julialang.org/u/andreh)\
**Replies:** 0\
**Last updated:** [February 25, 2025, 12:58pm UTC](https://discourse.julialang.org/t/julia-searchlight-migrations-how-to-add-foreign-key/126292 "2025-02-25T12:58:08Z")

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I am using Genie Framework and Julia to set up a basic database Migration This is how my module looks inside the folder db/migrations module CreateTableRolesUsers import SearchLight.Migrations: create\_table, column, p…

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## [DataInspector + bonito](https://discourse.julialang.org/t/datainspector-bonito/126249)

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**Author:** [@aTrotier](https://discourse.julialang.org/u/aTrotier)\
**Replies:** 3\
**Last updated:** [February 25, 2025, 11:15am UTC](https://discourse.julialang.org/t/datainspector-bonito/126249 "2025-02-25T11:15:06Z")

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How can I get an interactive html that show the label of scatter using DataInspector ? @sdanisch ## interactive plot works function makie\_plot\_2() fig=Figure() ax=Axis(fig\[1,1\],title = "test") scatter!(ax,rand(10),rand…

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## [Skyline logos for JuliaCon](https://discourse.julialang.org/t/skyline-logos-for-juliacon/126281)

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**Author:** [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Replies:** 3\
**Last updated:** [February 25, 2025, 9:55am UTC](https://discourse.julialang.org/t/skyline-logos-for-juliacon/126281 "2025-02-25T09:55:00Z")

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Hi there, Does anyone know where the cute city skyline graphics on the JuliaCon website come from? I may need one for Paris :sunglasses:

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## [Dagger + Dates = snakemake?](https://discourse.julialang.org/t/dagger-dates-snakemake/126111)

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**Author:** [@jonathanBieler](https://discourse.julialang.org/u/jonathanBieler)\
**Replies:** 3\
**Last updated:** [February 25, 2025, 9:42am UTC](https://discourse.julialang.org/t/dagger-dates-snakemake/126111 "2025-02-25T09:42:25Z")

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I have a folder data with samples (csv files), I want to compute some statistics for each file and then make a summary. In snakemake you can define rules how to produce the output file from the inputs, and snakemake will…

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## [Interpolations.jl interpolation evaluation causes allocation](https://discourse.julialang.org/t/interpolations-jl-interpolation-evaluation-causes-allocation/126279)

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**Author:** [@Bart\_van\_de\_Lint](https://discourse.julialang.org/u/Bart_van_de_Lint)\
**Replies:** 3\
**Last updated:** [February 25, 2025, 6:07am UTC](https://discourse.julialang.org/t/interpolations-jl-interpolation-evaluation-causes-allocation/126279 "2025-02-25T06:07:23Z")

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In the following MWE, all interpolation evaluations cause 1 allocation. I want to get rid of this allocation for optimal performance. What should I do to achieve this? using Interpolations, BenchmarkTools # Create test…

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## [Hidedecorations not working as expected for PolarAxis?](https://discourse.julialang.org/t/hidedecorations-not-working-as-expected-for-polaraxis/126231)

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**Author:** [@grero](https://discourse.julialang.org/u/grero)\
**Replies:** 2\
**Last updated:** [February 25, 2025, 1:17am UTC](https://discourse.julialang.org/t/hidedecorations-not-working-as-expected-for-polaraxis/126231 "2025-02-25T01:17:42Z")

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I’m putting together a fairly complicated figure, involving a mixture of line plots and polar histogram plots. Using PolarAxis for the latter, I found that they appear to take up more space than needed. To illustrate the…

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## [Cfunction: closures are not supported on this platform](https://discourse.julialang.org/t/cfunction-closures-are-not-supported-on-this-platform/126051)

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**Author:** [@mpeters2](https://discourse.julialang.org/u/mpeters2)\
**Replies:** 1\
**Last updated:** [February 25, 2025, 12:29am UTC](https://discourse.julialang.org/t/cfunction-closures-are-not-supported-on-this-platform/126051 "2025-02-25T00:29:27Z")

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I’ve been helping out on a wrapper for QT6, and I’m having problems with callbacks. Specifically, I get an error stating that “cfunction: closures are not supported on this platform”, and from what I gather, this seems …

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## [Re-creating MTK problems creates side effects (ModelingToolkit.jl)](https://discourse.julialang.org/t/re-creating-mtk-problems-creates-side-effects-modelingtoolkit-jl/126054)

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**Author:** [@ysfoo](https://discourse.julialang.org/u/ysfoo)\
**Replies:** 3\
**Last updated:** [February 24, 2025, 11:27pm UTC](https://discourse.julialang.org/t/re-creating-mtk-problems-creates-side-effects-modelingtoolkit-jl/126054 "2025-02-24T23:27:51Z")

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I am following the somewhat recent tutorial on re-creating MTK problems. In summary, the function loss is defined, which remakes an ODEProblem by replacing the tunable portion of the parameters with the input argument, a…

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## [Turning a string containing Unicode code points to a normal string](https://discourse.julialang.org/t/turning-a-string-containing-unicode-code-points-to-a-normal-string/126273)

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**Author:** [@lance\_xwq](https://discourse.julialang.org/u/lance_xwq)\
**Replies:** 2\
**Last updated:** [February 24, 2025, 11:03pm UTC](https://discourse.julialang.org/t/turning-a-string-containing-unicode-code-points-to-a-normal-string/126273 "2025-02-24T23:03:20Z")

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For example, given that '\\u03BC' is 'μ', how should I turn "\\\\u03BCm" to "μm"? Thanks for any suggestions!

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## [Revise not getting loaded in Julia Test Process, inside VS Code container](https://discourse.julialang.org/t/revise-not-getting-loaded-in-julia-test-process-inside-vs-code-container/126101)

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**Author:** [@bdforbes](https://discourse.julialang.org/u/bdforbes)\
**Replies:** 2\
**Last updated:** [February 24, 2025, 9:52pm UTC](https://discourse.julialang.org/t/revise-not-getting-loaded-in-julia-test-process-inside-vs-code-container/126101 "2025-02-24T21:52:17Z")

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I’m exploring a Julia workflow in VS Code where I’m running a Julia Docker container and attaching VS Code to that container. Things were generally going quite well, but I’ve noticed that Revise isn’t getting loaded into…

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## [Anyone have a working BBL implementation?](https://discourse.julialang.org/t/anyone-have-a-working-bbl-implementation/126266)

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**Author:** [@floswald](https://discourse.julialang.org/u/floswald)\
**Replies:** 0\
**Last updated:** [February 24, 2025, 9:18pm UTC](https://discourse.julialang.org/t/anyone-have-a-working-bbl-implementation/126266 "2025-02-24T21:18:30Z")

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Do any empirical IO folks on here have a working implementation of the BBL algorithm (Victor Aguirregabiria's Website - Computer Code) ? I did download the BBL code from there I now have GAUSS25. Erm…yeah. I find it ve…

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## [How to use CairoMakie.contourf!](https://discourse.julialang.org/t/how-to-use-cairomakie-contourf/113781)

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**Author:** [@SeSodesa](https://discourse.julialang.org/u/SeSodesa)\
**Replies:** 12\
**Last updated:** [February 24, 2025, 8:42pm UTC](https://discourse.julialang.org/t/how-to-use-cairomakie-contourf/113781 "2025-02-24T20:42:57Z")

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I cannot for the life of me figure out what the heck I need to pass to CairoMakie.contourf!. What I have tried thus far produces an error: """ Plots and electric field of two point charges with a countour plot on the sa…

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## [OPC UA package? ( Open Platform Communications Unified Architecture)](https://discourse.julialang.org/t/opc-ua-package-open-platform-communications-unified-architecture/94336)

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**Author:** [@ohmsweetohm1](https://discourse.julialang.org/u/ohmsweetohm1)\
**Replies:** 15\
**Last updated:** [February 24, 2025, 8:29pm UTC](https://discourse.julialang.org/t/opc-ua-package-open-platform-communications-unified-architecture/94336 "2025-02-24T20:29:56Z")

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Is there a Julia version of python-opcua or something equivalent?

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## [Different behaviour of contour in Plots and GLMakie](https://discourse.julialang.org/t/different-behaviour-of-contour-in-plots-and-glmakie/126247)

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**Author:** [@vtfanta](https://discourse.julialang.org/u/vtfanta)\
**Replies:** 4\
**Last updated:** [February 24, 2025, 7:51pm UTC](https://discourse.julialang.org/t/different-behaviour-of-contour-in-plots-and-glmakie/126247 "2025-02-24T19:51:39Z")

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When plotting a contour plot of a quadratic, behaviour is different for Plots and Makie, while Makie is correct. The motivation is to show an iteration of the Newton method. ▶ MWE Makie correctly shows the minimizer in t…

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## [Using Second-Order Cone Constraints with Logarithms in JuMP and Gurobi's C API](https://discourse.julialang.org/t/using-second-order-cone-constraints-with-logarithms-in-jump-and-gurobis-c-api/125769)

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**Author:** [@Beyza\_Aydin](https://discourse.julialang.org/u/Beyza_Aydin)\
**Replies:** 7\
**Last updated:** [February 24, 2025, 7:47pm UTC](https://discourse.julialang.org/t/using-second-order-cone-constraints-with-logarithms-in-jump-and-gurobis-c-api/125769 "2025-02-24T19:47:28Z")

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Hello, I am using JuMP with the Gurobi optimizer to solve a problem involving both second-order cone constraints and logarithmic constraints. I want to model the constraint ||x||\_1 \>= K\*||x||\_2 which I coded as: const…

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## [Precompilation keeps repeating](https://discourse.julialang.org/t/precompilation-keeps-repeating/126250)

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**Author:** [@natgeo-wong](https://discourse.julialang.org/u/natgeo-wong)\
**Replies:** 13\
**Last updated:** [February 24, 2025, 7:21pm UTC](https://discourse.julialang.org/t/precompilation-keeps-repeating/126250 "2025-02-24T19:21:23Z")

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Hi! When I’m using Julia on my Slurm HPC, it keeps redoing the precompilation. For example, if I’m running a julia script in terminal, and then running a pluto notebook under the same project (though under a different no…

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## [Want to attend JuliaCon 2025: how to pitch to my PhD advisors?](https://discourse.julialang.org/t/want-to-attend-juliacon-2025-how-to-pitch-to-my-phd-advisors/125703)

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**Author:** [@Ickaser](https://discourse.julialang.org/u/Ickaser)\
**Replies:** 12\
**Last updated:** [February 24, 2025, 7:03pm UTC](https://discourse.julialang.org/t/want-to-attend-juliacon-2025-how-to-pitch-to-my-phd-advisors/125703 "2025-02-24T19:03:26Z")

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I’m a PhD student in engineering, and use Julia extensively (and almost exclusively) for my PhD work, since my advisors don’t much care what language or tool I am using for my modeling work. I’ve been doing this for almo…

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## [Error in testset libraries/cusparse/interfaces](https://discourse.julialang.org/t/error-in-testset-libraries-cusparse-interfaces/126256)

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**Author:** [@jgforbes](https://discourse.julialang.org/u/jgforbes)\
**Replies:** 0\
**Last updated:** [February 24, 2025, 5:40pm UTC](https://discourse.julialang.org/t/error-in-testset-libraries-cusparse-interfaces/126256 "2025-02-24T17:40:50Z")

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I am seeing repeated errors when running test CUDA as show below. Is this a significant issue and if so, is there a fix? Here is my configuration: ulia\> CUDA.versioninfo() CUDA runtime 12.6, artifact installation CU…

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## [Looping within a quote block in a macro](https://discourse.julialang.org/t/looping-within-a-quote-block-in-a-macro/126246)

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**Author:** [@Pablo\_Marchant](https://discourse.julialang.org/u/Pablo_Marchant)\
**Replies:** 3\
**Last updated:** [February 24, 2025, 5:04pm UTC](https://discourse.julialang.org/t/looping-within-a-quote-block-in-a-macro/126246 "2025-02-24T17:04:08Z")

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Hi, I have a bit of a beginner question regarding macros. I’m well aware that macros are tricky and in many cases can just be replaced by functions, but I think for one application I have they can significantly reduce b…

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## [Pluto - GLMakie Button action ok in @async but crashing with Threads.@spawn](https://discourse.julialang.org/t/pluto-glmakie-button-action-ok-in-async-but-crashing-with-threads-spawn/126204)

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**Author:** [@RobbesU](https://discourse.julialang.org/u/RobbesU)\
**Replies:** 14\
**Last updated:** [February 24, 2025, 3:52pm UTC](https://discourse.julialang.org/t/pluto-glmakie-button-action-ok-in-async-but-crashing-with-threads-spawn/126204 "2025-02-24T15:52:44Z")

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I am trying to run a continuous animation from inside Pluto, which requires a run/pause button to control. The Making animated and interactive scientific visualizations in Makie.jl uses @async to spin off the task, but…

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## [@tturbo on function call](https://discourse.julialang.org/t/tturbo-on-function-call/126224)

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**Author:** [@Lincoln\_Hannah](https://discourse.julialang.org/u/Lincoln_Hannah)\
**Replies:** 4\
**Last updated:** [February 24, 2025, 3:15pm UTC](https://discourse.julialang.org/t/tturbo-on-function-call/126224 "2025-02-24T15:15:28Z")

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a=randn(5\*10^7) b=randn(5\*10^7) f(a::Float64,b::Float64)::Float64 = sin(a) + cos(b) @time @tturbo @. sin(a) + cos(b) # .05 seconds @time @tturbo @. f(a,b) # 1 second Is it possible to get the @tturbo speedu…

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## [Dividing Julia file in sections (VS code)](https://discourse.julialang.org/t/dividing-julia-file-in-sections-vs-code/63001)

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**Author:** [@eilbuga](https://discourse.julialang.org/u/eilbuga)\
**Replies:** 3\
**Last updated:** [February 24, 2025, 3:01pm UTC](https://discourse.julialang.org/t/dividing-julia-file-in-sections-vs-code/63001 "2025-02-24T15:01:03Z")

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Hi everyone, I was wondering if you can divide your Julia file in sections. I use this a lot when coding in Python so I don’t have to run every piece of code all the time. In Python VS code we can use #%% to divide in s…

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## [\[ANN\] EvoTrees.jl v0.17 - API update (and breaking changes)](https://discourse.julialang.org/t/ann-evotrees-jl-v0-17-api-update-and-breaking-changes/126234)

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**Author:** [@jeremiedb](https://discourse.julialang.org/u/jeremiedb)\
**Replies:** 0\
**Last updated:** [February 24, 2025, 5:39am UTC](https://discourse.julialang.org/t/ann-evotrees-jl-v0-17-api-update-and-breaking-changes/126234 "2025-02-24T05:39:11Z")

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Below are key changes with upcoming v0.17 release. It’s yet to be registered in General, and for now available through main branch, so changes could still be brought if some design choices appear problematic. The gener…

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## [This month in Julia world - 2024-12](https://discourse.julialang.org/t/this-month-in-julia-world-2024-12/124295)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 2\
**Last updated:** [February 24, 2025, 12:11pm UTC](https://discourse.julialang.org/t/this-month-in-julia-world-2024-12/124295 "2025-02-24T12:11:47Z")

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A monthly newsletter, mostly on julia internals, digestible for casual observers. A biased, incomplete, editorialized list of what I found interesting this month, with contributions from the community. “Internals” Fora …

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## [This month in Julia world - 2024-11](https://discourse.julialang.org/t/this-month-in-julia-world-2024-11/123830)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 6\
**Last updated:** [February 24, 2025, 12:01pm UTC](https://discourse.julialang.org/t/this-month-in-julia-world-2024-11/123830 "2025-02-24T12:01:24Z")

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A monthly newsletter, mostly on julia internals, digestible for casual observers. A biased, incomplete, editorialized list of what I found interesting this month, with contributions from the community. “Internals” Fora …

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## [First solve of \`ODEProblem\` and running out of memory: compilation problems?](https://discourse.julialang.org/t/first-solve-of-odeproblem-and-running-out-of-memory-compilation-problems/126160)

<div class="topic-metadata">

**Author:** [@johannesnauta](https://discourse.julialang.org/u/johannesnauta)\
**Replies:** 3\
**Last updated:** [February 24, 2025, 10:58am UTC](https://discourse.julialang.org/t/first-solve-of-odeproblem-and-running-out-of-memory-compilation-problems/126160 "2025-02-24T10:58:33Z")

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Hey it’s me again, I keep encountering memory-related issues with the first call to solve(prob), where prob is an ODEProblem (see details below). While this is probably expected, as it is most likely related to the “tim…

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## [Introduce a command-line option to warn on constant redefinition?](https://discourse.julialang.org/t/introduce-a-command-line-option-to-warn-on-constant-redefinition/126213)

<div class="topic-metadata">

**Author:** [@nsajko](https://discourse.julialang.org/u/nsajko)\
**Replies:** 6\
**Last updated:** [February 24, 2025, 9:01am UTC](https://discourse.julialang.org/t/introduce-a-command-line-option-to-warn-on-constant-redefinition/126213 "2025-02-24T09:01:36Z")

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Keno’s recent changes on in-development versions of Julia enable safe redefinition of constants, including, for example, struct types. This is great, especially for interactive use, Revise.jl, etc. However, I think it’d…

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## [Sk for advice on implementing a progress bar while running an MPI (Message Passing Interface)](https://discourse.julialang.org/t/sk-for-advice-on-implementing-a-progress-bar-while-running-an-mpi-message-passing-interface/126240)

<div class="topic-metadata">

**Author:** [@Iron\_Kim](https://discourse.julialang.org/u/Iron_Kim)\
**Replies:** 4\
**Last updated:** [February 24, 2025, 8:46am UTC](https://discourse.julialang.org/t/sk-for-advice-on-implementing-a-progress-bar-while-running-an-mpi-message-passing-interface/126240 "2025-02-24T08:46:51Z")

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Rank 0 Progress: \[==\> \] 20% Rank 1 Progress: \[=====\> \] 45% Rank 2 Progress: \[==========\> \] 60% … Rank 19 Progress: \[=====================\> \] 95% I want to imp…

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## [\[RELEASE\] RxInfer 4.0.0 and updated documentation](https://discourse.julialang.org/t/release-rxinfer-4-0-0-and-updated-documentation/126145)

<div class="topic-metadata">

**Author:** [@bvdmitri](https://discourse.julialang.org/u/bvdmitri)\
**Replies:** 2\
**Last updated:** [February 24, 2025, 8:40am UTC](https://discourse.julialang.org/t/release-rxinfer-4-0-0-and-updated-documentation/126145 "2025-02-24T08:40:55Z")

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We are pleased to announce the release of RxInfer.jl v4.0.0, which introduces significant enhancements to our probabilistic programming framework. A bit of a background RxInfer.jl is a Julia package designed for eff…

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