# Latest

**URL:** https://discourse.julialang.org/latest.md?page=148

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

**Page:** 149

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## [JuliaCon Local Paris 2025 - funding for attendees](https://discourse.julialang.org/t/juliacon-local-paris-2025-funding-for-attendees/130018)

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**Author:** [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Replies:** 0\
**Last updated:** [June 19, 2025, 8:07am UTC](https://discourse.julialang.org/t/juliacon-local-paris-2025-funding-for-attendees/130018 "2025-06-19T08:07:07Z")

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Hi everyone! JuliaCon Local Paris 2025 has received nearly 100 submissions, thank you so much for your enthusiasm! While we’re busy reviewing your proposals, it’s time to open applications for attendee funding. The org…

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## [ForwardDiff Allocations](https://discourse.julialang.org/t/forwarddiff-allocations/130006)

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**Author:** [@elenev](https://discourse.julialang.org/u/elenev)\
**Replies:** 3\
**Last updated:** [June 19, 2025, 2:26am UTC](https://discourse.julialang.org/t/forwarddiff-allocations/130006 "2025-06-19T02:26:15Z")

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I ran into a strange issue where very small changes to a non-allocating function affect whether it’s ForwardDiff.gradient! is allocating or not. Here is an MWE. It’s a vastly simplified version of my original structure,…

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## [Periodic linear advection](https://discourse.julialang.org/t/periodic-linear-advection/130003)

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**Author:** [@Tanya123](https://discourse.julialang.org/u/Tanya123)\
**Replies:** 0\
**Last updated:** [June 18, 2025, 8:05pm UTC](https://discourse.julialang.org/t/periodic-linear-advection/130003 "2025-06-18T20:05:54Z")

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I’m trying to numerically advect a scalar field β(x, y, t) only in the x-direction (no y-advection), mimicking a shifting pattern like β(x - ct). I’m using ModelingToolkit.jl to solve the PDE, but my code hangs after th…

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## [Results of Julia developer survey?](https://discourse.julialang.org/t/results-of-julia-developer-survey/117187)

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**Author:** [@CameronBieganek](https://discourse.julialang.org/u/CameronBieganek)\
**Replies:** 4\
**Last updated:** [June 18, 2025, 7:45pm UTC](https://discourse.julialang.org/t/results-of-julia-developer-survey/117187 "2025-06-18T19:45:06Z")

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Have the results of the Julia user & developer survey been published somewhere? I saw it listed in the JuliaCon talk schedule, but I couldn’t find the presentation in the daily YouTube videos.

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## [Problems with Julia QML and VSCode](https://discourse.julialang.org/t/problems-with-julia-qml-and-vscode/129999)

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**Author:** [@FSUfan](https://discourse.julialang.org/u/FSUfan)\
**Replies:** 4\
**Last updated:** [June 18, 2025, 7:02pm UTC](https://discourse.julialang.org/t/problems-with-julia-qml-and-vscode/129999 "2025-06-18T19:02:45Z")

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First, I apologize for the 74 error lines, but since there are multiple objects involved and I don’t know where to upload the text file… sorry but there are many elements involved I am trying to run some examples in Git…

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## [VS Code: clickable paths for unit test failures](https://discourse.julialang.org/t/vs-code-clickable-paths-for-unit-test-failures/130000)

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**Author:** [@Ken\_Williams](https://discourse.julialang.org/u/Ken_Williams)\
**Replies:** 0\
**Last updated:** [June 18, 2025, 6:32pm UTC](https://discourse.julialang.org/t/vs-code-clickable-paths-for-unit-test-failures/130000 "2025-06-18T18:32:31Z")

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In VS Code, having clickable and color-highlighted paths for stack traces is incredibly helpful in the REPL and some other contexts - but unfortunately for unit test failures (when running from the Testing pane), the err…

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## [Formatting rules for Symbolic.arguments](https://discourse.julialang.org/t/formatting-rules-for-symbolic-arguments/129993)

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**Author:** [@lukketotte](https://discourse.julialang.org/u/lukketotte)\
**Replies:** 3\
**Last updated:** [June 18, 2025, 2:53pm UTC](https://discourse.julialang.org/t/formatting-rules-for-symbolic-arguments/129993 "2025-06-18T14:53:03Z")

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Hi everyone. New to symbolic algebra in Julia and have a question about getting arguments from Symbolic.jl (using v. 6.41.0) expression. Is there any reason for the following differing formatting behavior in \`Symbolics.a…

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## [Discrepancy of ODE Sensitivity Analysis paper results with benchmarks](https://discourse.julialang.org/t/discrepancy-of-ode-sensitivity-analysis-paper-results-with-benchmarks/129853)

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**Author:** [@mra](https://discourse.julialang.org/u/mra)\
**Replies:** 31\
**Last updated:** [June 18, 2025, 2:01pm UTC](https://discourse.julialang.org/t/discrepancy-of-ode-sensitivity-analysis-paper-results-with-benchmarks/129853 "2025-06-18T14:01:19Z")

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I have tried to reproduce results from the paper “A Comparison of Automatic Differentiation and Continuous Sensitivity Analysis for Derivatives of Differential Equation Solutions” (https://arxiv.org/pdf/1812.01892, Fig. …

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## [Line wrapping with the VS Code extension?](https://discourse.julialang.org/t/line-wrapping-with-the-vs-code-extension/129992)

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**Author:** [@tom-plaa](https://discourse.julialang.org/u/tom-plaa)\
**Replies:** 0\
**Last updated:** [June 18, 2025, 1:45pm UTC](https://discourse.julialang.org/t/line-wrapping-with-the-vs-code-extension/129992 "2025-06-18T13:45:34Z")

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I’ve been looking for info on how to get automatic line wrapping at 92 char line width on the VS Code extension. I couldn’t find information on the extension’s documentation. The extension has integrated JuliaFormatter.j…

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## [FerriteCon 2025 – August 28 at DTU](https://discourse.julialang.org/t/ferritecon-2025-august-28-at-dtu/129991)

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**Author:** [@kimauth](https://discourse.julialang.org/u/kimauth)\
**Replies:** 0\
**Last updated:** [June 18, 2025, 1:33pm UTC](https://discourse.julialang.org/t/ferritecon-2025-august-28-at-dtu/129991 "2025-06-18T13:33:38Z")

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We’re excited to announce FerriteCon 2025, a one-day conference focused on the Ferrite.jl finite element toolbox, taking place August 28 at DTU (Campus Lyngby), just outside of Copenhagen! Ferrite.jl is a flexible and e…

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## [Clarification on save/load\_checkpoint() and populate\_from\_csv!()](https://discourse.julialang.org/t/clarification-on-save-load-checkpoint-and-populate-from-csv/129990)

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**Author:** [@elisadonati23](https://discourse.julialang.org/u/elisadonati23)\
**Replies:** 0\
**Last updated:** [June 18, 2025, 1:32pm UTC](https://discourse.julialang.org/t/clarification-on-save-load-checkpoint-and-populate-from-csv/129990 "2025-06-18T13:32:23Z")

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Dear all, I’m working on a relatively large agent-based model (ABM) for fish populations, without explicit spatial structure, using Agents.jl. The model includes individual stochasticity in parameter values and uses mul…

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## [How to get upper triangular Cholesky factor of sparse matrix?](https://discourse.julialang.org/t/how-to-get-upper-triangular-cholesky-factor-of-sparse-matrix/129979)

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**Author:** [@slwu89](https://discourse.julialang.org/u/slwu89)\
**Replies:** 3\
**Last updated:** [June 18, 2025, 1:22pm UTC](https://discourse.julialang.org/t/how-to-get-upper-triangular-cholesky-factor-of-sparse-matrix/129979 "2025-06-18T13:22:34Z")

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Hi all. I read the documentation here Linear Algebra · The Julia Language for what is returned when you call cholesky on a SparseMatrixCSC object but I still can’t figure out how to get back the upper triangular factor o…

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## [Sharing Julia Depots on Multi-User Platforms](https://discourse.julialang.org/t/sharing-julia-depots-on-multi-user-platforms/129961)

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**Author:** [@Mini4Ever](https://discourse.julialang.org/u/Mini4Ever)\
**Replies:** 10\
**Last updated:** [June 18, 2025, 12:42pm UTC](https://discourse.julialang.org/t/sharing-julia-depots-on-multi-user-platforms/129961 "2025-06-18T12:42:43Z")

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On a multi-user Linux platform, you want to install a Julia environment once while it is being used by many users (possibly at the same time). One can create a central installation of a Julia environment by exploiting th…

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## [Mesh grids and position array tranform](https://discourse.julialang.org/t/mesh-grids-and-position-array-tranform/129983)

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**Author:** [@Cyan](https://discourse.julialang.org/u/Cyan)\
**Replies:** 3\
**Last updated:** [June 18, 2025, 12:34pm UTC](https://discourse.julialang.org/t/mesh-grids-and-position-array-tranform/129983 "2025-06-18T12:34:43Z")

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I am working on the mesh grids, I want to ask whether there is quick transformation and inverse transformation between array\_x and flat\_x? array\_x = \[ \[1, 1, 1, 1\], \[2, 2, 2, 2\], \[3, 3, 3, 3\]\] a…

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## [Unable to submit to proceedings](https://discourse.julialang.org/t/unable-to-submit-to-proceedings/129863)

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**Author:** [@tobydriscoll](https://discourse.julialang.org/u/tobydriscoll)\
**Replies:** 2\
**Last updated:** [June 18, 2025, 12:30pm UTC](https://discourse.julialang.org/t/unable-to-submit-to-proceedings/129863 "2025-06-18T12:30:48Z")

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I am speaking in Pittsburgh next month, but I can’t seem to create a submission to the proceedings. I logged in to the site via ORCID, fully filled out the form, checked the confirmation boxes, and, when I click “Submit…

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## [JupyterLab \*\*Lite\*\* and status of Julia running WASM](https://discourse.julialang.org/t/jupyterlab-lite-and-status-of-julia-running-wasm/129957)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 3\
**Last updated:** [June 18, 2025, 12:11pm UTC](https://discourse.julialang.org/t/jupyterlab-lite-and-status-of-julia-running-wasm/129957 "2025-06-18T12:11:28Z")

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Hello, I have just discovered JupyterLab Lite \[repo\] - \[live\], where Python or R kernels can be run in the browser using WASM. This can be interesting in some didactical contexts, and as Julia is missing, I just wonder …

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## [\[ANN\] Infiltrator.jl v1.0](https://discourse.julialang.org/t/ann-infiltrator-jl-v1-0/62500)

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**Author:** [@pfitzseb](https://discourse.julialang.org/u/pfitzseb)\
**Replies:** 10\
**Last updated:** [June 18, 2025, 10:29am UTC](https://discourse.julialang.org/t/ann-infiltrator-jl-v1-0/62500 "2025-06-18T10:29:02Z")

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Hey everyone, Infiltrator.jl 1.0 is out now! There were a few substantial changes and a bunch of QOL improvements: Added an @exfiltrate macro to export all local variables into a global storage space (or safehouse). T…

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## [A custom type-stable regularization function in Lux & Enzyme](https://discourse.julialang.org/t/a-custom-type-stable-regularization-function-in-lux-enzyme/129984)

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**Author:** [@user22](https://discourse.julialang.org/u/user22)\
**Replies:** 0\
**Last updated:** [June 18, 2025, 9:44am UTC](https://discourse.julialang.org/t/a-custom-type-stable-regularization-function-in-lux-enzyme/129984 "2025-06-18T09:44:39Z")

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We are trying to develop a custom regularization function for the biases and weights of a simple dense neural network in Lux. However, we have not found a way to establish type-stable gradient computation for Lux and Enz…

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## [Nyquist-Shannon sampling theorem question](https://discourse.julialang.org/t/nyquist-shannon-sampling-theorem-question/129892)

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**Author:** [@Ju\_ska](https://discourse.julialang.org/u/Ju_ska)\
**Replies:** 7\
**Last updated:** [June 18, 2025, 9:07am UTC](https://discourse.julialang.org/t/nyquist-shannon-sampling-theorem-question/129892 "2025-06-18T09:07:37Z")

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Hi, I always thought that sampling at Fs \>= 2Fmax is the thing to do when sampling a signal. But I came across a school document that says if Fmin is also given, the sampling rate should be Fs \>= 2(Fmax - Fmin). It pu…

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## [Loading resampled data for PINN in Reactant + Enzyme + Lux](https://discourse.julialang.org/t/loading-resampled-data-for-pinn-in-reactant-enzyme-lux/129974)

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**Author:** [@NoFishLikeIan](https://discourse.julialang.org/u/NoFishLikeIan)\
**Replies:** 2\
**Last updated:** [June 17, 2025, 10:58pm UTC](https://discourse.julialang.org/t/loading-resampled-data-for-pinn-in-reactant-enzyme-lux/129974 "2025-06-17T22:58:15Z")

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I am implementing a neural network using Lux and Reactant + Enzyme. At each epoch, I need to resample the data, divide it in batches, and take a training step. For now, I am working on a CPU. What is the best way to do t…

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## [Rank-deficient jacobian error in Newton-Raphson method for unstable limit cycle refinement](https://discourse.julialang.org/t/rank-deficient-jacobian-error-in-newton-raphson-method-for-unstable-limit-cycle-refinement/129975)

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**Author:** [@R.Kanakov](https://discourse.julialang.org/u/R.Kanakov)\
**Replies:** 3\
**Last updated:** [June 17, 2025, 10:20pm UTC](https://discourse.julialang.org/t/rank-deficient-jacobian-error-in-newton-raphson-method-for-unstable-limit-cycle-refinement/129975 "2025-06-17T22:20:57Z")

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I am trying to refine the position of an unstable limit cycle within a chaotic attractor using the Newton-Raphson method, but I am running into a confusing error related to a rank-deficient matrix. To avoid degeneracy o…

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## [Subtyping directly in parametrics Types](https://discourse.julialang.org/t/subtyping-directly-in-parametrics-types/129949)

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**Author:** [@eotero](https://discourse.julialang.org/u/eotero)\
**Replies:** 10\
**Last updated:** [June 17, 2025, 10:02pm UTC](https://discourse.julialang.org/t/subtyping-directly-in-parametrics-types/129949 "2025-06-17T22:02:47Z")

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Can you explain how I should understand?

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## [Macro-defined callable structs \`ArgumentError: invalid type for argument number 1 in method definition\`](https://discourse.julialang.org/t/macro-defined-callable-structs-argumenterror-invalid-type-for-argument-number-1-in-method-definition/129971)

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**Author:** [@user664303](https://discourse.julialang.org/u/user664303)\
**Replies:** 3\
**Last updated:** [June 17, 2025, 6:07pm UTC](https://discourse.julialang.org/t/macro-defined-callable-structs-argumenterror-invalid-type-for-argument-number-1-in-method-definition/129971 "2025-06-17T18:07:39Z")

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Running macro definestruct(name, ndims) return quote struct $name{T} v::Vector{T} end $name(v::Vector{T}) where T = $name{T}(v) nvars(::$name) = $ndims end end @define…

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## [GLMakie displays false colours in WSL2](https://discourse.julialang.org/t/glmakie-displays-false-colours-in-wsl2/129590)

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**Author:** [@aris](https://discourse.julialang.org/u/aris)\
**Replies:** 12\
**Last updated:** [June 17, 2025, 2:19pm UTC](https://discourse.julialang.org/t/glmakie-displays-false-colours-in-wsl2/129590 "2025-06-17T14:19:04Z")

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Hello everyone, In WSL2 ubuntu, GLMakie gives me weird colours for some reason. For example, using GLMakie lines(rand(10)) results in: If I save the plot, the colours in the .png image are fine, its just the dis…

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## [Matlab to Julia: Random number generators](https://discourse.julialang.org/t/matlab-to-julia-random-number-generators/129937)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 19\
**Last updated:** [June 17, 2025, 1:33pm UTC](https://discourse.julialang.org/t/matlab-to-julia-random-number-generators/129937 "2025-06-17T13:33:34Z")

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I am writing unit tests for Matlab and Julia functions (Julia translated from Matlab), and both use the randn() function. Is there a way to get the same sequence of random numbers both in Matlab and Julia? Without that …

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## [Postdoc position in computational protein design in Cambridge, UK](https://discourse.julialang.org/t/postdoc-position-in-computational-protein-design-in-cambridge-uk/129967)

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**Author:** [@jgreener64](https://discourse.julialang.org/u/jgreener64)\
**Replies:** 0\
**Last updated:** [June 17, 2025, 11:40am UTC](https://discourse.julialang.org/t/postdoc-position-in-computational-protein-design-in-cambridge-uk/129967 "2025-06-17T11:40:24Z")

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There is a postdoc position open in my group, which uses lots of Julia. The full advert and application link is at Postdoctoral Scientist - Structural Studies - Dr Joe Greener - LMB 2633 job with MRC Laboratory of Molecu…

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## [Nested indentation in show](https://discourse.julialang.org/t/nested-indentation-in-show/7191)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 5\
**Last updated:** [June 17, 2025, 11:32am UTC](https://discourse.julialang.org/t/nested-indentation-in-show/7191 "2025-06-17T11:32:02Z")

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When writing some methods for show for types in a package, I was wondering if there is any mechanism (or package) for reusing show methods for fields but nesting the indentation. Eg suppose a type prints as This is a F…

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## [Metaprogramming with list comprehensions](https://discourse.julialang.org/t/metaprogramming-with-list-comprehensions/129943)

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**Author:** [@rokke](https://discourse.julialang.org/u/rokke)\
**Replies:** 11\
**Last updated:** [June 17, 2025, 11:29am UTC](https://discourse.julialang.org/t/metaprogramming-with-list-comprehensions/129943 "2025-06-17T11:29:47Z")

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I feel like I’m always writing \[foo(a,b,c) for a, b, c in 1:n\] when I mean \[foo(a,b,c) for a in 1:n, b in 1:n, c in 1:n\], so I’d like to add something to my startup.jl to make it so. I feel like I’ve seen conflicting in…

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## [Looking for a simple GUI](https://discourse.julialang.org/t/looking-for-a-simple-gui/129959)

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**Author:** [@FSUfan](https://discourse.julialang.org/u/FSUfan)\
**Replies:** 4\
**Last updated:** [June 17, 2025, 11:02am UTC](https://discourse.julialang.org/t/looking-for-a-simple-gui/129959 "2025-06-17T11:02:21Z")

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The screenshot below was created using Python and Qt5. I would like to create something similar with Julia. I looked around for a GUI that would suit my needs. There are many available, but most of them do things I don…

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## [Sparse GPU linear solve from documentation fails](https://discourse.julialang.org/t/sparse-gpu-linear-solve-from-documentation-fails/129834)

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**Author:** [@Jonas208](https://discourse.julialang.org/u/Jonas208)\
**Replies:** 2\
**Last updated:** [June 17, 2025, 10:57am UTC](https://discourse.julialang.org/t/sparse-gpu-linear-solve-from-documentation-fails/129834 "2025-06-17T10:57:22Z")

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To solve the Poisson equation on the GPU, I would like to use the interface from LinearSolve.jl to do a sparse linear solve. However, the following minimal reproducible example (also provided in the documentation) gives …

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