# Latest

**URL:** https://discourse.julialang.org/latest.md?page=159

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

**Page:** 160

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## [Pirates Baseball Game during JuliaCon Global 2025](https://discourse.julialang.org/t/pirates-baseball-game-during-juliacon-global-2025/128641)

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**Author:** [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Replies:** 4\
**Last updated:** [May 28, 2025, 8:50pm UTC](https://discourse.julialang.org/t/pirates-baseball-game-during-juliacon-global-2025/128641 "2025-05-28T20:50:06Z")

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Ahoy, there! Are you a Julia programmer or associated with one attending JuliaCon Global 2025? Do you some times commit type piracy? Are you interested in hanging out with Julia programmers during a baseball game? If an…

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## [Re-sizing DenseAxisArray Containers in JuMP](https://discourse.julialang.org/t/re-sizing-denseaxisarray-containers-in-jump/129367)

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**Author:** [@suwuken](https://discourse.julialang.org/u/suwuken)\
**Replies:** 6\
**Last updated:** [May 28, 2025, 8:33pm UTC](https://discourse.julialang.org/t/re-sizing-denseaxisarray-containers-in-jump/129367 "2025-05-28T20:33:22Z")

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I have a model with named variables as DenseAxisArray, e.g., using JuMP model = direct\_model(Gurobi.Optimizer()) model\[:x\] = @variable(model, 1 \>= x\[1:10, 1:5, 1:2\] \>= 0) This creates a DenseAxisArray which I can acces…

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## [Package like DaemonMode?](https://discourse.julialang.org/t/package-like-daemonmode/129413)

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**Author:** [@Satvik](https://discourse.julialang.org/u/Satvik)\
**Replies:** 2\
**Last updated:** [May 28, 2025, 3:21pm UTC](https://discourse.julialang.org/t/package-like-daemonmode/129413 "2025-05-28T15:21:42Z")

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I’m interested in using something like DaemonMode.jl to keep a Julia process running and send commands to it from another process. However, DaemonMode doesn’t seem to have been updated since 2021, and doesn’t install on …

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## [AD of LoopVectorization with Zygote?](https://discourse.julialang.org/t/ad-of-loopvectorization-with-zygote/129378)

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**Author:** [@MatPeron](https://discourse.julialang.org/u/MatPeron)\
**Replies:** 2\
**Last updated:** [May 28, 2025, 3:18pm UTC](https://discourse.julialang.org/t/ad-of-loopvectorization-with-zygote/129378 "2025-05-28T15:18:18Z")

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I’m writing a package to perform some physics calculations on large 3D arrays. In order to perform these calculations I need to compute a few quantities, in particular differential operators of the fields like the gradie…

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## [Roundtrip String -\> Syntax Tree -\> String with JuliaSyntax.jl](https://discourse.julialang.org/t/roundtrip-string-syntax-tree-string-with-juliasyntax-jl/102714)

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**Author:** [@theogf](https://discourse.julialang.org/u/theogf)\
**Replies:** 4\
**Last updated:** [May 28, 2025, 3:09pm UTC](https://discourse.julialang.org/t/roundtrip-string-syntax-tree-string-with-juliasyntax-jl/102714 "2025-05-28T15:09:51Z")

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Hi! I am really hyped about JuliaSyntax.jl, however I could not figure out how to perform a round trip from the parsed String to a syntax tree and back to a String. Is this something possible already? My usecase would…

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## [ERROR: syntax: unexpected semicolon in tuple around REPL](https://discourse.julialang.org/t/error-syntax-unexpected-semicolon-in-tuple-around-repl/129399)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 4\
**Last updated:** [May 28, 2025, 2:22pm UTC](https://discourse.julialang.org/t/error-syntax-unexpected-semicolon-in-tuple-around-repl/129399 "2025-05-28T14:22:48Z")

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Why can’t I write this compound expression? (The context is a Givens rotation) julia\> A = rand(-9:9, 2, 2) 2×2 Matrix{Int64}: -9 -9 -1 1 julia\> t = pi/3 1.0471975511965976 julia\> c, s = cos(t), sin(t); \[c s; -s c…

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## [Mesh (ndgrid) to points list](https://discourse.julialang.org/t/mesh-ndgrid-to-points-list/129404)

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**Author:** [@Cyan](https://discourse.julialang.org/u/Cyan)\
**Replies:** 3\
**Last updated:** [May 28, 2025, 2:01pm UTC](https://discourse.julialang.org/t/mesh-ndgrid-to-points-list/129404 "2025-05-28T14:01:51Z")

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Is there any quick method to generate position pairs (x,y) for each points from following mesh grid xg and yg? x = range(-2, 2, 50) y = range(-2, 2, 50) (xg, yg) = ndgrid(x, y) Finished with collect(zip(xg,yg))

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## [Bottom and top in text in Makie](https://discourse.julialang.org/t/bottom-and-top-in-text-in-makie/129403)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 2\
**Last updated:** [May 28, 2025, 1:50pm UTC](https://discourse.julialang.org/t/bottom-and-top-in-text-in-makie/129403 "2025-05-28T13:50:37Z")

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I suspect that the “top” and “bottom” here should be swapped? Note that I mean that the API text!(; align = ...) should be modified. I don’t mean the tutorial itself . The text is just above the baseline—this is the…

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## [Create a new DateTime dataframe column from Date and Time columns](https://discourse.julialang.org/t/create-a-new-datetime-dataframe-column-from-date-and-time-columns/129406)

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**Author:** [@Ju\_ska](https://discourse.julialang.org/u/Ju_ska)\
**Replies:** 2\
**Last updated:** [May 28, 2025, 1:02pm UTC](https://discourse.julialang.org/t/create-a-new-datetime-dataframe-column-from-date-and-time-columns/129406 "2025-05-28T13:02:21Z")

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Hi, (sorry for the pedantic syntax…) using DataFrames using Dates df = DataFrame(DATE=\[Date("2025-01-01","yyyy-mm-dd"), Date("2025-01-01","yyyy-mm-dd"), Date("2025-01-02","yyyy-mm-dd")\], TIME=\[Time("00:00:00"), Time("…

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## [Plot lots of surfaces with normals](https://discourse.julialang.org/t/plot-lots-of-surfaces-with-normals/129377)

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**Author:** [@weymouth](https://discourse.julialang.org/u/weymouth)\
**Replies:** 5\
**Last updated:** [May 28, 2025, 11:46am UTC](https://discourse.julialang.org/t/plot-lots-of-surfaces-with-normals/129377 "2025-05-28T11:46:27Z")

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I have an array of named tuples, each of which describes a 3D panel. Panels corners, centers, areas, normal vector, etc. I want to plot the panels and be able to apply a color to each one. I would like to use Plots and p…

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## [Extension methods for various backends](https://discourse.julialang.org/t/extension-methods-for-various-backends/129401)

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**Author:** [@weymouth](https://discourse.julialang.org/u/weymouth)\
**Replies:** 1\
**Last updated:** [May 28, 2025, 10:00am UTC](https://discourse.julialang.org/t/extension-methods-for-various-backends/129401 "2025-05-28T10:00:08Z")

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We are using Makie to build up some plotting extensions for a few packages, but we have older extension methods for Plots as well. If the user only have Plots or only has Makie, everything works, but what if they have in…

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## [BifurcationKit nd point periodic orbit](https://discourse.julialang.org/t/bifurcationkit-nd-point-periodic-orbit/129384)

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**Author:** [@Mehmet\_On](https://discourse.julialang.org/u/Mehmet_On)\
**Replies:** 2\
**Last updated:** [May 28, 2025, 9:58am UTC](https://discourse.julialang.org/t/bifurcationkit-nd-point-periodic-orbit/129384 "2025-05-28T09:58:32Z")

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Hello, I am new to Julia and BifurcationKit.jl. I would like to simulate a model, 6 differential equations, 4 complex 2 real variables. Because I am new, I started from a simplified version, 2 equations, 2 complex variab…

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## [Finding Parameters for Boundary-Value Problem using DifferentialEquations.jl](https://discourse.julialang.org/t/finding-parameters-for-boundary-value-problem-using-differentialequations-jl/129386)

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**Author:** [@parf](https://discourse.julialang.org/u/parf)\
**Replies:** 2\
**Last updated:** [May 28, 2025, 9:50am UTC](https://discourse.julialang.org/t/finding-parameters-for-boundary-value-problem-using-differentialequations-jl/129386 "2025-05-28T09:50:21Z")

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Hello everyone! I have a system of equations, the solution of which defines a trajectory on a plane: dx/dt = Vx(x,y,t,p), dy/dt = Vy(x,y,t,p), where p is some unknown parameter. I know the starting point of the trajec…

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## [Matrix to dataframe conversion with structure of existing dataframe](https://discourse.julialang.org/t/matrix-to-dataframe-conversion-with-structure-of-existing-dataframe/129278)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 4\
**Last updated:** [May 28, 2025, 8:51am UTC](https://discourse.julialang.org/t/matrix-to-dataframe-conversion-with-structure-of-existing-dataframe/129278 "2025-05-28T08:51:46Z")

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Is there any built-in function to convert a matrix to a DataFrame with the structure of a second DataFrame ? i.e. : df = DataFrame(a = \[1,2,3\], b= \["a","b","c"\]) # Option 1, types not promoted dfnames = names(df) m = …

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## [Unstable execution time with high standard error in Julia](https://discourse.julialang.org/t/unstable-execution-time-with-high-standard-error-in-julia/129295)

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**Author:** [@PanT12](https://discourse.julialang.org/u/PanT12)\
**Replies:** 27\
**Last updated:** [May 28, 2025, 8:25am UTC](https://discourse.julialang.org/t/unstable-execution-time-with-high-standard-error-in-julia/129295 "2025-05-28T08:25:31Z")

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Has anyone encountered unstable results from Julia, specifically issues with large variance? For example, when I repeat the following experiment 100 times and record the time taken for each run, I find that there are alw…

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## [General type of 2d arrays](https://discourse.julialang.org/t/general-type-of-2d-arrays/129394)

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**Author:** [@Cyan](https://discourse.julialang.org/u/Cyan)\
**Replies:** 1\
**Last updated:** [May 28, 2025, 4:46am UTC](https://discourse.julialang.org/t/general-type-of-2d-arrays/129394 "2025-05-28T04:46:05Z")

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Hi, all. I am writing a function of 2d array, in which xg and yg are designed to be any format of n x n array. But I always encounter the errors of TypeError of xg and yg. Is there any widely general type of 2d array to…

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## [Sudden slowdown with ODEProblem](https://discourse.julialang.org/t/sudden-slowdown-with-odeproblem/128909)

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**Author:** [@rswhittle](https://discourse.julialang.org/u/rswhittle)\
**Replies:** 10\
**Last updated:** [May 28, 2025, 1:03am UTC](https://discourse.julialang.org/t/sudden-slowdown-with-odeproblem/128909 "2025-05-28T01:03:07Z")

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Hi, throwing out a Hail Mary here as I have no idea what I am doing. We had/have a working ModelingToolkit model, then suddenly last night it stopped working as the DifferentialEquations.jl package wouldn’t precompile (…

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## [BenchmarkDataNLP.jl](https://discourse.julialang.org/t/benchmarkdatanlp-jl/129393)

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**Author:** [@mantzaris](https://discourse.julialang.org/u/mantzaris)\
**Replies:** 0\
**Last updated:** [May 27, 2025, 9:24pm UTC](https://discourse.julialang.org/t/benchmarkdatanlp-jl/129393 "2025-05-27T21:24:13Z")

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BenchmarkDataNLP.jl, a Julia package for quickly generating synthetic, complexity controlled NLP benchmark datasets. Without having to search for large corpora or cleaning messy CSVs etc. GitHub repo → https://github.com…

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## [Unusually Slow First Device-to-Host Copy on A100 GPU](https://discourse.julialang.org/t/unusually-slow-first-device-to-host-copy-on-a100-gpu/129348)

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**Author:** [@magicura](https://discourse.julialang.org/u/magicura)\
**Replies:** 6\
**Last updated:** [May 27, 2025, 8:57pm UTC](https://discourse.julialang.org/t/unusually-slow-first-device-to-host-copy-on-a100-gpu/129348 "2025-05-27T20:57:54Z")

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Hi everyone, I’m running into an issue where the first attempt to copy data from the device to the host is extremely slow. This problem persists even after running the function multiple times, so I don’t think it’s rela…

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## [Gurobi compute IIS in Julia](https://discourse.julialang.org/t/gurobi-compute-iis-in-julia/129391)

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**Author:** [@cby](https://discourse.julialang.org/u/cby)\
**Replies:** 1\
**Last updated:** [May 27, 2025, 8:37pm UTC](https://discourse.julialang.org/t/gurobi-compute-iis-in-julia/129391 "2025-05-27T20:37:31Z")

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What is the equivalent of the following in Julia? https://support.gurobi.com/hc/en-us/articles/15656630439441-How-do-I-use-compute-IIS-to-find-a-subset-of-constraints-that-are-causing-model-infeasibility I understand I…

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## [Interesting talk for the Julia sorting community](https://discourse.julialang.org/t/interesting-talk-for-the-julia-sorting-community/129385)

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**Author:** [@Dan](https://discourse.julialang.org/u/Dan)\
**Replies:** 3\
**Last updated:** [May 27, 2025, 8:01pm UTC](https://discourse.julialang.org/t/interesting-talk-for-the-julia-sorting-community/129385 "2025-05-27T20:01:07Z")

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Here is an interesting talk given lately: Giving details about TimSort and the new PowerSort and other interesting details. This may be for @Lilith and other people who like things to be in proper order. P…

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## [Plot ellipse in Makie?](https://discourse.julialang.org/t/plot-ellipse-in-makie/82814)

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**Author:** [@e3c6](https://discourse.julialang.org/u/e3c6)\
**Replies:** 5\
**Last updated:** [May 27, 2025, 4:44pm UTC](https://discourse.julialang.org/t/plot-ellipse-in-makie/82814 "2025-05-27T16:44:24Z")

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How can I draw a 2-dimensional ellipse in a Makie plot?

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## [Mixing LaTeX equations and Chinese in Makie plot titles](https://discourse.julialang.org/t/mixing-latex-equations-and-chinese-in-makie-plot-titles/129374)

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**Author:** [@xiaoming](https://discourse.julialang.org/u/xiaoming)\
**Replies:** 2\
**Last updated:** [May 27, 2025, 2:19pm UTC](https://discourse.julialang.org/t/mixing-latex-equations-and-chinese-in-makie-plot-titles/129374 "2025-05-27T14:19:16Z")

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I have tried: using GLMakie f = Figure() Axis(f\[1,1\], title=(L"中文 $\\sin$")) Axis(f\[1,2\], title=(L"\\text{中文}\\ \\sin")) f It doesn’t work.

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## [Windows 7 support](https://discourse.julialang.org/t/windows-7-support/129116)

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**Author:** [@Mikhail\_Kagalenko](https://discourse.julialang.org/u/Mikhail_Kagalenko)\
**Replies:** 18\
**Last updated:** [May 27, 2025, 2:39pm UTC](https://discourse.julialang.org/t/windows-7-support/129116 "2025-05-27T14:39:05Z")

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“Platform specific notes” states, that Julia is available for Windows 7 and later for both 32-bit and 64-bit versions. However, the current stable release fails to run with the message “GetSystemTimePreciseAsFileTime not…

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## [Expose \`Base.depwarn(...; force=false)\` in \`@deprecate\`](https://discourse.julialang.org/t/expose-base-depwarn-force-false-in-deprecate/129383)

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**Author:** [@drbergman](https://discourse.julialang.org/u/drbergman)\
**Replies:** 0\
**Last updated:** [May 27, 2025, 2:31pm UTC](https://discourse.julialang.org/t/expose-base-depwarn-force-false-in-deprecate/129383 "2025-05-27T14:31:41Z")

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Following up on the conversation in Why is \`depwarn=no\` by default? Would it be possible to expose the force kwarg of Base.depwarn in the @deprecate call? I just opened a PR in DeprecateKeywords.jl that uses the followin…

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## [Basic Data Utilities in PowerModels.jl---some more methods?](https://discourse.julialang.org/t/basic-data-utilities-in-powermodels-jl-some-more-methods/129291)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 9\
**Last updated:** [May 27, 2025, 2:28pm UTC](https://discourse.julialang.org/t/basic-data-utilities-in-powermodels-jl-some-more-methods/129291 "2025-05-27T14:28:38Z")

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This post is a feature request related to Basic Data Utilities · PowerModels. Although this sparse incidence matrix (denoted A) is useful, sometimes we may need another more succinct matrix—I call it bft, branch\_from\_to…

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## [How can I generate a 3D annulus surface and mesh it using Meshes.jl?](https://discourse.julialang.org/t/how-can-i-generate-a-3d-annulus-surface-and-mesh-it-using-meshes-jl/110949)

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**Author:** [@xiaoming](https://discourse.julialang.org/u/xiaoming)\
**Replies:** 7\
**Last updated:** [May 27, 2025, 11:46am UTC](https://discourse.julialang.org/t/how-can-i-generate-a-3d-annulus-surface-and-mesh-it-using-meshes-jl/110949 "2025-05-27T11:46:18Z")

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I have tried using PolyArea. Here is MME: ring1=Meshes.Ring(\[(cos(t),sin(t),0) for t in 0.1:0.1:2pi\]) ring2=Meshes.Ring(\[(2cos(t),2sin(t),0) for t in 0.1:0.1:2pi\]) annulus = PolyArea(\[ring2, ring1\]) discretize(annulus, …

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## [Varinfo() not working on script](https://discourse.julialang.org/t/varinfo-not-working-on-script/129365)

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**Author:** [@stefaniecg](https://discourse.julialang.org/u/stefaniecg)\
**Replies:** 4\
**Last updated:** [May 27, 2025, 8:58am UTC](https://discourse.julialang.org/t/varinfo-not-working-on-script/129365 "2025-05-27T08:58:26Z")

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I run the below script via command line: julia script.jl. # file name: script.jl a = 1 b = 2 c = a + b varinfo() My problem is that the varinfo() does not run in terminal, i get the following error: ERROR: LoadError: …

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## [Deriving the Jacobians without MTK](https://discourse.julialang.org/t/deriving-the-jacobians-without-mtk/129203)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 1\
**Last updated:** [May 26, 2025, 7:58pm UTC](https://discourse.julialang.org/t/deriving-the-jacobians-without-mtk/129203 "2025-05-26T19:58:46Z")

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I have a nonlinear, numeric model. The model uses a non-linear solver internally. It has three inputs, one output and many parameters. How can I calculate the Jacobians of a linearized model? Can I use AutoFiniteDiff() …

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## [Dynamic union of parametric types](https://discourse.julialang.org/t/dynamic-union-of-parametric-types/129247)

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**Author:** [@Andrea\_Vigliotti](https://discourse.julialang.org/u/Andrea_Vigliotti)\
**Replies:** 21\
**Last updated:** [May 27, 2025, 7:23am UTC](https://discourse.julialang.org/t/dynamic-union-of-parametric-types/129247 "2025-05-27T07:23:17Z")

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I am trying to define Union types that collect different instances of different types, it should be possible to append newer types that are defined later on, so that the union types can grow here an example: module Ele…

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