# Latest

**URL:** https://discourse.julialang.org/latest.md?page=122

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

**Page:** 123

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## [Verner 9 Runge Kutta Interpolator Issue](https://discourse.julialang.org/t/verner-9-runge-kutta-interpolator-issue/131591)

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**Author:** [@may7even](https://discourse.julialang.org/u/may7even)\
**Replies:** 3\
**Last updated:** [August 14, 2025, 4:40am UTC](https://discourse.julialang.org/t/verner-9-runge-kutta-interpolator-issue/131591 "2025-08-14T04:40:09Z")

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Hello, I am trying to implement the vern9 runge kutta method for a side project, and so far, everything has been good, except for the interpolation of the states for a dense output. For some reason, when compared with a …

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## [How does one turn off Autodiff +Jacobian in DifferentialEquations.jl solvers?](https://discourse.julialang.org/t/how-does-one-turn-off-autodiff-jacobian-in-differentialequations-jl-solvers/131588)

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**Author:** [@erny123](https://discourse.julialang.org/u/erny123)\
**Replies:** 4\
**Last updated:** [August 14, 2025, 4:39am UTC](https://discourse.julialang.org/t/how-does-one-turn-off-autodiff-jacobian-in-differentialequations-jl-solvers/131588 "2025-08-14T04:39:20Z")

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EDIT I’m trying to solve a simple mixed point BVP such as: \\partial\_z \\mathbf{a} = C\_1 \\mathbf{a} + g \\mathbf{a} \\mathbf{b} \\mathbf{b}^{\*} \\partial\_z \\mathbf{b} = C\_2 \\mathbf{b} + g \\mathbf{b} \\mathbf{a} \\ma…

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## [Struct copy with change in the value of fields](https://discourse.julialang.org/t/struct-copy-with-change-in-the-value-of-fields/19592)

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**Author:** [@rveltz](https://discourse.julialang.org/u/rveltz)\
**Replies:** 8\
**Last updated:** [August 14, 2025, 12:33am UTC](https://discourse.julialang.org/t/struct-copy-with-change-in-the-value-of-fields/19592 "2025-08-14T00:33:29Z")

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Hi, I have an anoying situation where I want to copy a variable of composed type by changing a value of the field which may in turn change the type. Here is an example # in my application, the following struct contain…

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## [HiGHS multi-objective optimization stuck in infinite loop](https://discourse.julialang.org/t/highs-multi-objective-optimization-stuck-in-infinite-loop/131559)

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**Author:** [@BdeKoning](https://discourse.julialang.org/u/BdeKoning)\
**Replies:** 8\
**Last updated:** [August 14, 2025, 12:13am UTC](https://discourse.julialang.org/t/highs-multi-objective-optimization-stuck-in-infinite-loop/131559 "2025-08-14T00:13:07Z")

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I’m refactoring my code to go from custom multi objective optimization to using MultiObjectiveAlgorithms.jl with Lexicographic. When I run my optimization it never stops, with this repeated log message: So it looks l…

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## [Linter/formatter for naming conventions?](https://discourse.julialang.org/t/linter-formatter-for-naming-conventions/131539)

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**Author:** [@DanielSussman](https://discourse.julialang.org/u/DanielSussman)\
**Replies:** 1\
**Last updated:** [August 13, 2025, 8:20pm UTC](https://discourse.julialang.org/t/linter-formatter-for-naming-conventions/131539 "2025-08-13T20:20:21Z")

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Hi all, I’m working on writing more idiomatic Julia code and trying to adhere to a common style. I know this is a relatively minor detail, but for whatever reason – old habits die hard, I guess! – I consistently fail to…

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## [Metal.jl does not speed up FFT](https://discourse.julialang.org/t/metal-jl-does-not-speed-up-fft/95528)

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**Author:** [@huangc](https://discourse.julialang.org/u/huangc)\
**Replies:** 8\
**Last updated:** [August 13, 2025, 10:48pm UTC](https://discourse.julialang.org/t/metal-jl-does-not-speed-up-fft/95528 "2025-08-13T22:48:55Z")

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I was hoping to explore the possibility of using Metal.jl to speed up Fourier transfer without needing to copy between CPU and GPU. However, my benchmark results showed no improvement in speed which makes me suspect that…

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## [Multidispatch based on value of positional argument](https://discourse.julialang.org/t/multidispatch-based-on-value-of-positional-argument/131584)

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**Author:** [@Snowy](https://discourse.julialang.org/u/Snowy)\
**Replies:** 4\
**Last updated:** [August 13, 2025, 4:35pm UTC](https://discourse.julialang.org/t/multidispatch-based-on-value-of-positional-argument/131584 "2025-08-13T16:35:55Z")

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Hi, Just to make sure I understand multidispatch correctly here: There is no way to multidispatch based on a value in a positional argument, correct? For example, something like: function multidispatch(x,y,string\_argu…

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## [Error when downloading package -- Failed to clone from gitlab.com](https://discourse.julialang.org/t/error-when-downloading-package-failed-to-clone-from-gitlab-com/130032)

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**Author:** [@Snowy](https://discourse.julialang.org/u/Snowy)\
**Replies:** 10\
**Last updated:** [August 13, 2025, 6:14pm UTC](https://discourse.julialang.org/t/error-when-downloading-package-failed-to-clone-from-gitlab-com/130032 "2025-08-13T18:14:42Z")

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Hi all, I’m trying to install MLJ.jl and am running into an error when installing the package: ERROR: failed to clone from https://gitlab.com/ExpandingMan/ShowCases.jl.git, error: GitError(Code:ERROR, Class:OS, failed …

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## [Julia downloads stats and Julia downloads badges](https://discourse.julialang.org/t/julia-downloads-stats-and-julia-downloads-badges/74712)

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**Author:** [@essenciary](https://discourse.julialang.org/u/essenciary)\
**Replies:** 12\
**Last updated:** [August 13, 2025, 5:50pm UTC](https://discourse.julialang.org/t/julia-downloads-stats-and-julia-downloads-badges/74712 "2025-08-13T17:50:14Z")

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Hi everyone! 1/ We have just released a Genie data dashboard for exploring download trends and stats for all the Julia packages, available at https://pkgs.genieframework.com It’s an easy to use interface to the public …

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## [How to disable print-outs when plotting (for \`savefig\` on e.g. hpc)](https://discourse.julialang.org/t/how-to-disable-print-outs-when-plotting-for-savefig-on-e-g-hpc/131592)

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**Author:** [@Torkel](https://discourse.julialang.org/u/Torkel)\
**Replies:** 0\
**Last updated:** [August 13, 2025, 5:27pm UTC](https://discourse.julialang.org/t/how-to-disable-print-outs-when-plotting-for-savefig-on-e-g-hpc/131592 "2025-08-13T17:27:21Z")

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I am running some code on a hpc server (both interactively in the terminal and using slurm). As part of the process I am getting print outs like qt.qpa.xcb: could not connect to display localhost:13.0 qt.qpa.plugin: Fro…

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## [Can we solve complex valued two point boundary value problems?](https://discourse.julialang.org/t/can-we-solve-complex-valued-two-point-boundary-value-problems/53232)

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**Author:** [@406700](https://discourse.julialang.org/u/406700)\
**Replies:** 12\
**Last updated:** [August 13, 2025, 5:13pm UTC](https://discourse.julialang.org/t/can-we-solve-complex-valued-two-point-boundary-value-problems/53232 "2025-08-13T17:13:25Z")

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Hi, I am new to using Julia for differential equations. I am having a problem trying to solve a complex valued two point boundary value problem using the MIRK4 solver. I have tried to define complex valued initial condi…

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## [Comparing distribution with KS-test](https://discourse.julialang.org/t/comparing-distribution-with-ks-test/131589)

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**Author:** [@Sergey\_Novak](https://discourse.julialang.org/u/Sergey_Novak)\
**Replies:** 1\
**Last updated:** [August 13, 2025, 4:53pm UTC](https://discourse.julialang.org/t/comparing-distribution-with-ks-test/131589 "2025-08-13T16:53:24Z")

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Hello all! I have a vector of local maximum spikes extracted from a time series. I also have the probability density function (PDF) for these local maxima. I need to compare my distribution with the Weibull distributio…

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## [Adjust the decimals in scientific notation with Plots.jl](https://discourse.julialang.org/t/adjust-the-decimals-in-scientific-notation-with-plots-jl/131555)

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**Author:** [@kraqbi](https://discourse.julialang.org/u/kraqbi)\
**Replies:** 8\
**Last updated:** [August 13, 2025, 3:24pm UTC](https://discourse.julialang.org/t/adjust-the-decimals-in-scientific-notation-with-plots-jl/131555 "2025-08-13T15:24:10Z")

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Hello! I try to publish my figures so I need to edit them as nicely as possible. I have trouble adjusting the format of my ylabel. I would like to keep a scientific notation, but Plots.jl is automatically set to a two…

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## [2025 HPCWire awards](https://discourse.julialang.org/t/2025-hpcwire-awards/131583)

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**Author:** [@viralbshah](https://discourse.julialang.org/u/viralbshah)\
**Replies:** 0\
**Last updated:** [August 13, 2025, 2:43pm UTC](https://discourse.julialang.org/t/2025-hpcwire-awards/131583 "2025-08-13T14:43:50Z")

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Dear all, I am sure many in the community here read HPC Wire articles. The nomination for the 2025 HPC Wire awards is open now. Please nominate Julia and packages / applications if you believe they are award worthy for …

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## [How can I start a Julia worker on my laptop from a remote server?](https://discourse.julialang.org/t/how-can-i-start-a-julia-worker-on-my-laptop-from-a-remote-server/131406)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 12\
**Last updated:** [August 13, 2025, 12:30pm UTC](https://discourse.julialang.org/t/how-can-i-start-a-julia-worker-on-my-laptop-from-a-remote-server/131406 "2025-08-13T12:30:45Z")

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I can use ssh to connect to a remote server. Now I would like to display plots on my laptop (from the server) by launching a worker on my laptop using the addprocs function. I have this code, which works fine as long as…

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## [Numerical Linear Algebra class in Julia @ TUM](https://discourse.julialang.org/t/numerical-linear-algebra-class-in-julia-tum/128661)

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**Author:** [@nvenkov1](https://discourse.julialang.org/u/nvenkov1)\
**Replies:** 4\
**Last updated:** [August 13, 2025, 10:04am UTC](https://discourse.julialang.org/t/numerical-linear-algebra-class-in-julia-tum/128661 "2025-08-13T10:04:33Z")

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I am currently teaching a graduate class on numerical linear algebra at the Technical University of Munich (TUM), and gradually uploading the content created at https://venkovic.github.io/NLA-for-CS-and-IE. On the websit…

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## [How to automatically click a certain button on the computer window?](https://discourse.julialang.org/t/how-to-automatically-click-a-certain-button-on-the-computer-window/130192)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 6\
**Last updated:** [August 12, 2025, 6:42am UTC](https://discourse.julialang.org/t/how-to-automatically-click-a-certain-button-on-the-computer-window/130192 "2025-08-12T06:42:01Z")

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Hello everyone! I want to click a certain button in a certain window on the computer screen at some future time point. I think it needs to first identify the position of the button based on its title, then click it at th…

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## [@allocated does not work on Julia 1.12rc1](https://discourse.julialang.org/t/allocated-does-not-work-on-julia-1-12rc1/131553)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 13\
**Last updated:** [August 13, 2025, 5:35am UTC](https://discourse.julialang.org/t/allocated-does-not-work-on-julia-1-12rc1/131553 "2025-08-13T05:35:24Z")

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Example: julia\> @allocated x=rand(3) 80 julia\> x ERROR: UndefVarError: \`x\` not defined in \`Main\` Suggestion: check for spelling errors or missing imports. Works fine on 1.11. Any known workaround?

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## [How to store \_parameteric\_ functions with JLD2?](https://discourse.julialang.org/t/how-to-store-parameteric-functions-with-jld2/131552)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 5\
**Last updated:** [August 13, 2025, 5:46am UTC](https://discourse.julialang.org/t/how-to-store-parameteric-functions-with-jld2/131552 "2025-08-13T05:46:03Z")

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I have a struct (part of a ML model in the real case) where one field is a function. For the function itself, as the function is provided by the package, I have no issues saving and loading it back. However, my problem…

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## [Franklin: inserting animations and plots in pages?](https://discourse.julialang.org/t/franklin-inserting-animations-and-plots-in-pages/131545)

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**Author:** [@fusion809](https://discourse.julialang.org/u/fusion809)\
**Replies:** 4\
**Last updated:** [August 12, 2025, 8:34pm UTC](https://discourse.julialang.org/t/franklin-inserting-animations-and-plots-in-pages/131545 "2025-08-12T20:34:26Z")

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How do I insert animation mp4s from my Julia code blocks into a webpage on my Franklin.jl-powered website? I have tried doing this by having the codeblock: \`\`\`julia:./code/heatEquation using FFTW, StaticArrays, Plots, I…

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## [Colorbar of a Contour Plot](https://discourse.julialang.org/t/colorbar-of-a-contour-plot/131566)

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**Author:** [@prconlin](https://discourse.julialang.org/u/prconlin)\
**Replies:** 3\
**Last updated:** [August 12, 2025, 7:02pm UTC](https://discourse.julialang.org/t/colorbar-of-a-contour-plot/131566 "2025-08-12T19:02:18Z")

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Hello, I have a matrix of discrete values, and I would like to plot it as a contour plot instead of a heatmap, because reasons. This works well enough, except that the colorbar is strange and I can’t find a way to corr…

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## [DiffEqPhysics restricts ForwardDiff version](https://discourse.julialang.org/t/diffeqphysics-restricts-forwarddiff-version/131565)

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**Author:** [@liamh](https://discourse.julialang.org/u/liamh)\
**Replies:** 2\
**Last updated:** [August 12, 2025, 6:01pm UTC](https://discourse.julialang.org/t/diffeqphysics-restricts-forwarddiff-version/131565 "2025-08-12T18:01:26Z")

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I am unable to load a package I am writing because DiffEqPhysics restricts the version of ForwardDiff to 0.10.38, but 1.0.1 is installed. Is there a reason for this restriction, and is it possible to override it? Julia …

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## [Would it make sense for Julia to adopt refinement types?](https://discourse.julialang.org/t/would-it-make-sense-for-julia-to-adopt-refinement-types/113586)

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**Author:** [@xiaoxi](https://discourse.julialang.org/u/xiaoxi)\
**Replies:** 22\
**Last updated:** [August 12, 2025, 4:55pm UTC](https://discourse.julialang.org/t/would-it-make-sense-for-julia-to-adopt-refinement-types/113586 "2025-08-12T16:55:47Z")

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Refinement types enrich a language’s type system with logical predicates that circumscribe the set of values described by the type, thereby providing software developers a tunable knob with which to inform the type syst…

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## [Break out of Infiltrator](https://discourse.julialang.org/t/break-out-of-infiltrator/124134)

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**Author:** [@Ken\_Williams](https://discourse.julialang.org/u/Ken_Williams)\
**Replies:** 5\
**Last updated:** [August 12, 2025, 3:41pm UTC](https://discourse.julialang.org/t/break-out-of-infiltrator/124134 "2025-08-12T15:41:51Z")

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Is there some way to break completely out of Infiltrator’s @infiltrate mode and return to the REPL, not executing any further code? Just like a “stop” button would in most IDEs’ debugging modes. I see the @exit macro, …

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## [Not plots with plotly, apple silicon and VSCode](https://discourse.julialang.org/t/not-plots-with-plotly-apple-silicon-and-vscode/131550)

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**Author:** [@romain-chiap](https://discourse.julialang.org/u/romain-chiap)\
**Replies:** 2\
**Last updated:** [August 12, 2025, 3:15pm UTC](https://discourse.julialang.org/t/not-plots-with-plotly-apple-silicon-and-vscode/131550 "2025-08-12T15:15:56Z")

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Hello dears, I just changed my macos intel for a macos M4 and I’m trying to run my jupyter notebook plotting scripts. Here is a snippet of my code using Plots BG\_COLOR = RGB(0.2, 0.2, 0.2); # background color of the p…

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## [Broad phase Collision detection: Bitboard approach](https://discourse.julialang.org/t/broad-phase-collision-detection-bitboard-approach/131512)

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**Author:** [@Gesee](https://discourse.julialang.org/u/Gesee)\
**Replies:** 30\
**Last updated:** [August 12, 2025, 12:45pm UTC](https://discourse.julialang.org/t/broad-phase-collision-detection-bitboard-approach/131512 "2025-08-12T12:45:48Z")

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I have recently tried a new approach to detect potential collisions in a 2D space, just for the broad phase (In this phase we just try to quickly reduce the number of potential collision to check) so I have come up with …

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## [Matrix with zero columns multiplied by vector with zero elements yields vector](https://discourse.julialang.org/t/matrix-with-zero-columns-multiplied-by-vector-with-zero-elements-yields-vector/131518)

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**Author:** [@Joris\_Pinkse](https://discourse.julialang.org/u/Joris_Pinkse)\
**Replies:** 11\
**Last updated:** [August 12, 2025, 12:29pm UTC](https://discourse.julialang.org/t/matrix-with-zero-columns-multiplied-by-vector-with-zero-elements-yields-vector/131518 "2025-08-12T12:29:06Z")

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What is the reason behind this behavior? Type stability? I had expected this to either yield a two by zero matrix or throw an error. julia\> A = zeros( 2, 0 ) 2×0 Matrix{Float64} julia\> B = zeros( 0, ) Float64\[\] juli…

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## [What do we have to attract C++ or other languages' power users to try Julia?](https://discourse.julialang.org/t/what-do-we-have-to-attract-c-or-other-languages-power-users-to-try-julia/131491)

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**Author:** [@Tarny\_GG\_Channie](https://discourse.julialang.org/u/Tarny_GG_Channie)\
**Replies:** 30\
**Last updated:** [August 12, 2025, 11:58am UTC](https://discourse.julialang.org/t/what-do-we-have-to-attract-c-or-other-languages-power-users-to-try-julia/131491 "2025-08-12T11:58:52Z")

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I know threads about increasing Julia’s adoption among the general programmer population have been done to death. I’m not making another one of those threads. Instead, this thread would focus on the top 1% of programmers…

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## [UndefVarError: cuda\_version in Google Colab with CUDA.jl](https://discourse.julialang.org/t/undefvarerror-cuda-version-in-google-colab-with-cuda-jl/131557)

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**Author:** [@rrabadan](https://discourse.julialang.org/u/rrabadan)\
**Replies:** 2\
**Last updated:** [August 12, 2025, 11:57am UTC](https://discourse.julialang.org/t/undefvarerror-cuda-version-in-google-colab-with-cuda-jl/131557 "2025-08-12T11:57:03Z")

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Hello, I’m working in a Google Colab notebook with a GPU runtime and am running into UndefVarError when trying to use CUDA.jl. For instance when I run CUDA.versioninfo(): using CUDA CUDA.versioninfo() I get the follow…

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## [Segmentation fault over repeated sparse Cholesky factorizations](https://discourse.julialang.org/t/segmentation-fault-over-repeated-sparse-cholesky-factorizations/131499)

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**Author:** [@RayleighLord](https://discourse.julialang.org/u/RayleighLord)\
**Replies:** 2\
**Last updated:** [August 12, 2025, 9:34am UTC](https://discourse.julialang.org/t/segmentation-fault-over-repeated-sparse-cholesky-factorizations/131499 "2025-08-12T09:34:28Z")

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This is related to this post but I manage to isolate the problem quite a bit. I have a sparse symmetric matrix Kee. I found that if I repeatedly factorize this matrix in a for loop (never running out of memory) at some …

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