# Latest

**URL:** https://discourse.julialang.org/latest.md?page=244

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

**Page:** 245

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## [How to exactly solve large overdetermined systems of linear equations](https://discourse.julialang.org/t/how-to-exactly-solve-large-overdetermined-systems-of-linear-equations/86710)

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**Author:** [@nsajko](https://discourse.julialang.org/u/nsajko)\
**Replies:** 16\
**Last updated:** [January 4, 2025, 5:48pm UTC](https://discourse.julialang.org/t/how-to-exactly-solve-large-overdetermined-systems-of-linear-equations/86710 "2025-01-04T17:48:02Z")

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Suppose I have, e.g., 250 linear equations with Rational{BigInt} coefficients, with 150 variables. If the system is inconsistent I want to know about it, otherwise I want the exact solution. Is there an easier way than …

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## [Required dependencies for extensions](https://discourse.julialang.org/t/required-dependencies-for-extensions/124422)

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**Author:** [@tz-lom](https://discourse.julialang.org/u/tz-lom)\
**Replies:** 2\
**Last updated:** [January 4, 2025, 5:14pm UTC](https://discourse.julialang.org/t/required-dependencies-for-extensions/124422 "2025-01-04T17:14:14Z")

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I am making a package with functionality which can be nicely visualized with GraphVis, so GraphVis is additional dependency that is not strictly required for the package itself. I am looking how to provide user experien…

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## [How to save interactive plot with GLMakie](https://discourse.julialang.org/t/how-to-save-interactive-plot-with-glmakie/124352)

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**Author:** [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Replies:** 5\
**Last updated:** [January 4, 2025, 3:15pm UTC](https://discourse.julialang.org/t/how-to-save-interactive-plot-with-glmakie/124352 "2025-01-04T15:15:10Z")

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I am drawing an interactive plot with GLMakie that includes sliders. Is it possible to make a button to save the figure, preferably with the sliders or better with/without it? I can draw the button, but is there a simpl…

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## [GLMakie LoadError when plotting contour](https://discourse.julialang.org/t/glmakie-loaderror-when-plotting-contour/124424)

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**Author:** [@Jonas\_Bachmann](https://discourse.julialang.org/u/Jonas_Bachmann)\
**Replies:** 0\
**Last updated:** [January 4, 2025, 12:14pm UTC](https://discourse.julialang.org/t/glmakie-loaderror-when-plotting-contour/124424 "2025-01-04T12:14:41Z")

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I am trying to make 3D contour plots in julia with GLMakie.jl. using GLMakie fig = Figure() ax = Axis3(fig\[1, 1\]) data = rand(30, 30, 30) surf = GLMakie.contour!(ax, data) save("fig.png", fig) When I run it, I get the…

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## [For loop performance vs "functional" performance](https://discourse.julialang.org/t/for-loop-performance-vs-functional-performance/124351)

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**Author:** [@rocco\_sprmnt21](https://discourse.julialang.org/u/rocco_sprmnt21)\
**Replies:** 17\
**Last updated:** [January 4, 2025, 11:33am UTC](https://discourse.julialang.org/t/for-loop-performance-vs-functional-performance/124351 "2025-01-04T11:33:34Z")

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The part 2 of the problem of day 19 of the AOC 2024 requires calculating the number of partitions of a string that are subsets of a given set of substrings. This is repeated for a list of strings and to obtain the total…

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## [Julia 1.12 feature freeze: Wednesday, January 8, 2025](https://discourse.julialang.org/t/julia-1-12-feature-freeze-wednesday-january-8-2025/122902)

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**Author:** [@dilumaluthge](https://discourse.julialang.org/u/dilumaluthge)\
**Replies:** 4\
**Last updated:** [January 4, 2025, 4:04am UTC](https://discourse.julialang.org/t/julia-1-12-feature-freeze-wednesday-january-8-2025/122902 "2025-01-04T04:04:52Z")

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We have set the feature freeze for Julia 1.12 to Wednesday, January 8, 2025. If there are any feature PRs that you’d like to get into Julia 1.12, they’ll need to be merged prior to that date. For context, the Julia 1.…

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## [Package Compiler GitHub Actions Build Template](https://discourse.julialang.org/t/package-compiler-github-actions-build-template/124378)

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**Author:** [@Kyjor](https://discourse.julialang.org/u/Kyjor)\
**Replies:** 2\
**Last updated:** [January 3, 2025, 10:03pm UTC](https://discourse.julialang.org/t/package-compiler-github-actions-build-template/124378 "2025-01-03T22:03:27Z")

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Hey all, I’m working on a new project, and set up automatic builds with GitHub actions that creates a package compiler app and automatically uploads these artifacts to github. I extracted the foundation of this to an ex…

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## [How to speedup setindex! and getindex?](https://discourse.julialang.org/t/how-to-speedup-setindex-and-getindex/124413)

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**Author:** [@Thomas\_Van\_Giel](https://discourse.julialang.org/u/Thomas_Van_Giel)\
**Replies:** 3\
**Last updated:** [January 3, 2025, 8:50pm UTC](https://discourse.julialang.org/t/how-to-speedup-setindex-and-getindex/124413 "2025-01-03T20:50:58Z")

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I have a piece of code where the setindex! and getindex function take a lot of time to execute. Quite simplified, the code looks a bit like this: using Random function main() A = rand(0:0.1:100000, 200,200) for s…

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## [Kalman Filter with Enzyme](https://discourse.julialang.org/t/kalman-filter-with-enzyme/124264)

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**Author:** [@charlesknipp](https://discourse.julialang.org/u/charlesknipp)\
**Replies:** 3\
**Last updated:** [January 3, 2025, 8:10pm UTC](https://discourse.julialang.org/t/kalman-filter-with-enzyme/124264 "2025-01-03T20:10:49Z")

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Consider the simple problem of MLE on a linear Gaussian state space model using a Kalman filter. When properly designed, automatic differentiation should be a trivial task for achieving a log score; and for most backends…

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## [Iterating through a continuous decision variable and retrieving its values](https://discourse.julialang.org/t/iterating-through-a-continuous-decision-variable-and-retrieving-its-values/124412)

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**Author:** [@rolim.gustavo](https://discourse.julialang.org/u/rolim.gustavo)\
**Replies:** 4\
**Last updated:** [January 3, 2025, 5:29pm UTC](https://discourse.julialang.org/t/iterating-through-a-continuous-decision-variable-and-retrieving-its-values/124412 "2025-01-03T17:29:45Z")

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Dear colleagues, I am implementing a branch-and-check procedure in JuMP that requires to extract some variable values. For instance, I have to retrieve the values of decision variable X, that is defined as follows: @va…

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## [Managing the arguments for nested function calls](https://discourse.julialang.org/t/managing-the-arguments-for-nested-function-calls/124414)

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**Author:** [@prconlin](https://discourse.julialang.org/u/prconlin)\
**Replies:** 3\
**Last updated:** [January 3, 2025, 5:25pm UTC](https://discourse.julialang.org/t/managing-the-arguments-for-nested-function-calls/124414 "2025-01-03T17:25:37Z")

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For the sake of performance and readability, I make an effort to compartmentalize my code into functions as much as possible. But I consistently run into a problem with ballooning argument lists whenever I have nested f…

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## [Qt Warning: \*path/to/file.qml\*: RangeError: Maximum call stack size exceeded](https://discourse.julialang.org/t/qt-warning-path-to-file-qml-rangeerror-maximum-call-stack-size-exceeded/122130)

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**Author:** [@Valery](https://discourse.julialang.org/u/Valery)\
**Replies:** 7\
**Last updated:** [January 3, 2025, 1:31pm UTC](https://discourse.julialang.org/t/qt-warning-path-to-file-qml-rangeerror-maximum-call-stack-size-exceeded/122130 "2025-01-03T13:31:52Z")

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When runing this using QML using Observables slidervalue = Observable(0.0) loadqml( joinpath(pwd(),"slider.qml"), variables = JuliaPropertyMap( "slidervalue" =\> slidervalue ) ) exec() and the content of “s…

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## [Why Pluto.jl run so much faster than GenieFramework.jl](https://discourse.julialang.org/t/why-pluto-jl-run-so-much-faster-than-genieframework-jl/124234)

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**Author:** [@garazha-ilya](https://discourse.julialang.org/u/garazha-ilya)\
**Replies:** 7\
**Last updated:** [January 3, 2025, 12:35pm UTC](https://discourse.julialang.org/t/why-pluto-jl-run-so-much-faster-than-genieframework-jl/124234 "2025-01-03T12:35:32Z")

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I have a gauge animation with Plotly in Pluto and GenieFramework. But Pluto plots and tracks slider incredibly faster. Can someone help me with optimizations with Genie? Or explain, why it is fundamentally impossible. …

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## [How to select more than one object with Stipple.select()](https://discourse.julialang.org/t/how-to-select-more-than-one-object-with-stipple-select/124394)

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**Author:** [@TheHedgehog2000](https://discourse.julialang.org/u/TheHedgehog2000)\
**Replies:** 1\
**Last updated:** [January 3, 2025, 12:34pm UTC](https://discourse.julialang.org/t/how-to-select-more-than-one-object-with-stipple-select/124394 "2025-01-03T12:34:10Z")

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It’s straightforward using Stipple to select an object x from options y like Stipple.select(:x; options=:y) . Is there a way for x to be an array of options? More concretely, if y is an array of files that I’ve uploaded …

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## [Help with Julia Integration in RStudio](https://discourse.julialang.org/t/help-with-julia-integration-in-rstudio/124374)

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**Author:** [@Gael\_Gautier](https://discourse.julialang.org/u/Gael_Gautier)\
**Replies:** 3\
**Last updated:** [January 3, 2025, 10:04am UTC](https://discourse.julialang.org/t/help-with-julia-integration-in-rstudio/124374 "2025-01-03T10:04:56Z")

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Hello, I’m encountering an issue with using Julia in RStudio and would appreciate your help in resolving it. I am using RStudio to write Quarto (qmd) scripts that include R, Python, and Bash code. However, due to the l…

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## [\`ccall\` on Windows \`could not load symbol. The specified procedure could not be found\`](https://discourse.julialang.org/t/ccall-on-windows-could-not-load-symbol-the-specified-procedure-could-not-be-found/66291)

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**Author:** [@nlaws](https://discourse.julialang.org/u/nlaws)\
**Replies:** 18\
**Last updated:** [January 3, 2025, 9:59am UTC](https://discourse.julialang.org/t/ccall-on-windows-could-not-load-symbol-the-specified-procedure-could-not-be-found/66291 "2025-01-03T09:59:59Z")

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I am loading in a custom C library and then calling functions with @ccall. Everything works fine on Apple and Linux with: hdl = Libc.Libdl.dlopen("path/to/clibrary", Libc.Libdl.RTLD\_GLOBAL) wind\_module = @ccall ssc\_modu…

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## [Julia Copenhagen Meetup - 9th of January 2025](https://discourse.julialang.org/t/julia-copenhagen-meetup-9th-of-january-2025/124404)

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**Author:** [@wc4wc4wc4](https://discourse.julialang.org/u/wc4wc4wc4)\
**Replies:** 0\
**Last updated:** [January 3, 2025, 9:20am UTC](https://discourse.julialang.org/t/julia-copenhagen-meetup-9th-of-january-2025/124404 "2025-01-03T09:20:16Z")

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The next meetup will be Thursday the 9th of January at 18.00 at P1 in the Observatory in the Botanical Garden in Inner City Copenhagen. This time we will hear from Kim Louisa Auth, Ph.D. from Chalmers University of Tech…

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## [How to exit Julia altogether from bash terminal?](https://discourse.julialang.org/t/how-to-exit-julia-altogether-from-bash-terminal/124360)

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**Author:** [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Replies:** 5\
**Last updated:** [January 3, 2025, 8:01am UTC](https://discourse.julialang.org/t/how-to-exit-julia-altogether-from-bash-terminal/124360 "2025-01-03T08:01:56Z")

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Hello, I am launching a julia script with a bash script. How can I terminate the julia script so to go back into bash? I used exit(0) but the terminal remains in Julia… Thanks

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## [Inplace MPI\_Allreduce give wrong results. Solved: better doc is needed](https://discourse.julialang.org/t/inplace-mpi-allreduce-give-wrong-results-solved-better-doc-is-needed/124395)

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**Author:** [@jsjie](https://discourse.julialang.org/u/jsjie)\
**Replies:** 2\
**Last updated:** [January 3, 2025, 6:59am UTC](https://discourse.julialang.org/t/inplace-mpi-allreduce-give-wrong-results-solved-better-doc-is-needed/124395 "2025-01-03T06:59:58Z")

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A MWE: using MPI a = \[1.0, 2.0, 3.0, 4.0\] MPI.Init() MPI.API.MPI\_Allreduce(MPI.API.MPI\_IN\_PLACE, a, 4, MPI.Datatype(Float64), MPI.Op(+, Float64), MPI.COMM\_WORLD) MPI.Finalize() println(a) which outputs \[NaN, 1.386670…

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## [Unicode diacritical marks in filenames](https://discourse.julialang.org/t/unicode-diacritical-marks-in-filenames/124392)

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**Author:** [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Replies:** 2\
**Last updated:** [January 3, 2025, 6:56am UTC](https://discourse.julialang.org/t/unicode-diacritical-marks-in-filenames/124392 "2025-01-03T06:56:00Z")

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Anything with diacritics (dots hats, wiggles above/below) are a bit complicated you can write the German ö as exactly that letter or use “◌߳” U+07F3 Nko Combining Double Dot Above Unicode Character before/with an o. T…

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## [Using Knitro with ForwardDiff and JuMP](https://discourse.julialang.org/t/using-knitro-with-forwarddiff-and-jump/124396)

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**Author:** [@Rick](https://discourse.julialang.org/u/Rick)\
**Replies:** 2\
**Last updated:** [January 3, 2025, 6:22am UTC](https://discourse.julialang.org/t/using-knitro-with-forwarddiff-and-jump/124396 "2025-01-03T06:22:22Z")

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Hi, I am trying to use Knitro with JuMP which contains a constraint that imposes the gradient of a function to be 0. I want to compute the gradient using ForwardDiff. I found this can be done using Ipopt, but I cannot …

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## [Improving error messages for structs](https://discourse.julialang.org/t/improving-error-messages-for-structs/124390)

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**Author:** [@Ken\_Williams](https://discourse.julialang.org/u/Ken_Williams)\
**Replies:** 2\
**Last updated:** [January 3, 2025, 1:02am UTC](https://discourse.julialang.org/t/improving-error-messages-for-structs/124390 "2025-01-03T01:02:29Z")

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If I have a situation like the following: struct Bar x::Float64 y::Float64 end Bar(missing, 2) then the error message doesn’t seem to indicate whether x or y was the problem: ERROR: LoadError: MethodError: Ca…

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## [Lapack wrappers and final arguments 1](https://discourse.julialang.org/t/lapack-wrappers-and-final-arguments-1/124391)

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**Author:** [@juthohaegeman](https://discourse.julialang.org/u/juthohaegeman)\
**Replies:** 2\
**Last updated:** [January 3, 2025, 12:25am UTC](https://discourse.julialang.org/t/lapack-wrappers-and-final-arguments-1/124391 "2025-01-03T00:25:17Z")

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Studying some of the Lapack wrappers over at LinearAlgebra.jl/src/lapack.jl at master · JuliaLang/LinearAlgebra.jl · GitHub, I am confused by the ccall structure. Most relevant lapack methods have info as their final arg…

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## [Using Unicode in README.md file?](https://discourse.julialang.org/t/using-unicode-in-readme-md-file/124097)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 6\
**Last updated:** [December 23, 2024, 8:46am UTC](https://discourse.julialang.org/t/using-unicode-in-readme-md-file/124097 "2024-12-23T08:46:26Z")

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If I look at the README at this website: GitHub - baggepinnen/TrajectoryLimiters.jl: Nonlinear filters to create dynamically feasible reference trajectories with Firefox the unicode characters are very distorted and hard…

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## [Update a Plotly chart in Pluto in response to a click?](https://discourse.julialang.org/t/update-a-plotly-chart-in-pluto-in-response-to-a-click/124382)

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**Author:** [@Kirby\_Zhang](https://discourse.julialang.org/u/Kirby_Zhang)\
**Replies:** 2\
**Last updated:** [January 2, 2025, 9:57pm UTC](https://discourse.julialang.org/t/update-a-plotly-chart-in-pluto-in-response-to-a-click/124382 "2025-01-02T21:57:14Z")

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I would like to highlight the point that was clicked in a Plotly chart, within a Pluto notebook. I understand that since Pluto doesn’t support WebIO, you cannot use PlotlyJS but must use PlutoPlotly. Based on a supplied …

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## [UndefVarError: \`𝕊ᶻ\` not defined](https://discourse.julialang.org/t/undefvarerror-not-defined/124380)

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**Author:** [@JYOTI\_BISHT](https://discourse.julialang.org/u/JYOTI_BISHT)\
**Replies:** 2\
**Last updated:** [January 2, 2025, 5:31pm UTC](https://discourse.julialang.org/t/undefvarerror-not-defined/124380 "2025-01-02T17:31:38Z")

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Hi Julia team, I am trying this trial code given on julia website to do exact diagonalization using QuantumLattices. The problem is: writing the following code it says UndefVarError: 𝕊ᶻ not defined using QuantumLattic…

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## [Compute integral for DelaunayTriangulation.jl to be able to solve PDE with FiniteVolumeMethod.jl](https://discourse.julialang.org/t/compute-integral-for-delaunaytriangulation-jl-to-be-able-to-solve-pde-with-finitevolumemethod-jl/124310)

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**Author:** [@B4rtel](https://discourse.julialang.org/u/B4rtel)\
**Replies:** 4\
**Last updated:** [January 2, 2025, 3:20pm UTC](https://discourse.julialang.org/t/compute-integral-for-delaunaytriangulation-jl-to-be-able-to-solve-pde-with-finitevolumemethod-jl/124310 "2025-01-02T15:20:13Z")

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Hi :), I would like to solve a advection PDE of the form \\frac{\\partial}{\\partial t} f(x,t) = - \\nabla\_x \\cdot \\left(\\left(\\int \[\\phi(p\_1(x,y),\\phi(p\_2(x,y)\]\\odot (y-x) f(y,t) \\text{d} y\\right) f(x,t)\\right) for p\_a(x\_i…

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## [Second order gradient with Lux, Zygote, CUDA, Enzyme](https://discourse.julialang.org/t/second-order-gradient-with-lux-zygote-cuda-enzyme/124301)

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**Author:** [@Tomas\_Pevny](https://discourse.julialang.org/u/Tomas_Pevny)\
**Replies:** 12\
**Last updated:** [January 2, 2025, 2:48pm UTC](https://discourse.julialang.org/t/second-order-gradient-with-lux-zygote-cuda-enzyme/124301 "2025-01-02T14:48:04Z")

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Dear All, I had a small pet project over the christmas, for some very specific application (steganography) I want to train a neural network while regularizing the gradient with respect to the input, which means that dur…

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## [Norton Antivirus updated and tried to quarantine julia/juliaup (IDP.Generic)](https://discourse.julialang.org/t/norton-antivirus-updated-and-tried-to-quarantine-julia-juliaup-idp-generic/124373)

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**Author:** [@Benny](https://discourse.julialang.org/u/Benny)\
**Replies:** 0\
**Last updated:** [January 2, 2025, 2:22pm UTC](https://discourse.julialang.org/t/norton-antivirus-updated-and-tried-to-quarantine-julia-juliaup-idp-generic/124373 "2025-01-02T14:22:51Z")

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Not about Julia itself I don’t think, but Norton Antivirus’ recent update is trying to quarantine it julia (IDP.Generic) detected by Behavioral Protection Please restart your PC to move juliaup.exe to your Quarantin…

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## [Unable to construct \`ADNLPModel\` with a matrix of linear constraints](https://discourse.julialang.org/t/unable-to-construct-adnlpmodel-with-a-matrix-of-linear-constraints/124361)

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**Author:** [@ForceBru](https://discourse.julialang.org/u/ForceBru)\
**Replies:** 3\
**Last updated:** [January 2, 2025, 1:14pm UTC](https://discourse.julialang.org/t/unable-to-construct-adnlpmodel-with-a-matrix-of-linear-constraints/124361 "2025-01-02T13:14:04Z")

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The documentation of ADNLPModels.ADNLPModel suggests that there are methods that accept a matrix A to signify linear constraints: ADNLPModel(f, x0, A, lcon, ucon) ADNLPModel(f, x0, lvar, uvar, A, lcon, ucon) These cons…

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