# Latest

**URL:** https://discourse.julialang.org/latest.md?page=369

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

**Page:** 370

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## [Failure to precompile FixedEffectModels](https://discourse.julialang.org/t/failure-to-precompile-fixedeffectmodels/116541)

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**Author:** [@luke98](https://discourse.julialang.org/u/luke98)\
**Replies:** 5\
**Last updated:** [July 6, 2024, 8:03am UTC](https://discourse.julialang.org/t/failure-to-precompile-fixedeffectmodels/116541 "2024-07-06T08:03:36Z")

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Hi All, I am new to Julia. I am trying to use the package FixedEffectModels. After adding the Package I am trying to run the code as provided in the Readme file of the github package: using DataFrames, RDatasets, Fixe…

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## [\[Ann\] LightSumTypes.jl - Combine multiple types in a single one](https://discourse.julialang.org/t/ann-lightsumtypes-jl-combine-multiple-types-in-a-single-one/109204)

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**Author:** [@Tortar](https://discourse.julialang.org/u/Tortar)\
**Replies:** 5\
**Last updated:** [July 6, 2024, 1:01am UTC](https://discourse.julialang.org/t/ann-lightsumtypes-jl-combine-multiple-types-in-a-single-one/109204 "2024-07-06T01:01:47Z")

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I’m happy to announce MixedStructTypes.jl which allows to compactify multiple mutable and immutable types in a single one with a similar syntax to the one of structs. They work identical to structs for many operations be…

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## [Call for hosts for JuliaCon 2025](https://discourse.julialang.org/t/call-for-hosts-for-juliacon-2025/116686)

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**Author:** [@ranjan](https://discourse.julialang.org/u/ranjan)\
**Replies:** 0\
**Last updated:** [July 6, 2024, 12:59am UTC](https://discourse.julialang.org/t/call-for-hosts-for-juliacon-2025/116686 "2024-07-06T00:59:11Z")

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Hello all, Please find linked our official call for hosts for JuliaCon 2025: Please go through the requirements carefully and if you’d like to put your hat in the ring, please email raye@julialang.org & ranjan@julial…

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## [MTK acausal modeling not working with @discrete\_events](https://discourse.julialang.org/t/mtk-acausal-modeling-not-working-with-discrete-events/116683)

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**Author:** [@JosephChoi](https://discourse.julialang.org/u/JosephChoi)\
**Replies:** 1\
**Last updated:** [July 5, 2024, 11:35pm UTC](https://discourse.julialang.org/t/mtk-acausal-modeling-not-working-with-discrete-events/116683 "2024-07-05T23:35:23Z")

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I’m trying to model an unsteady-state CSTR with discrete-event PI controller updates using MTK’s acausal component-based modeling framework, but I’m having trouble with @discrete\_events (or @continuous\_events) not being …

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## [Makie ecdfplot color](https://discourse.julialang.org/t/makie-ecdfplot-color/116675)

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**Author:** [@VincentPoupart](https://discourse.julialang.org/u/VincentPoupart)\
**Replies:** 2\
**Last updated:** [July 5, 2024, 9:22pm UTC](https://discourse.julialang.org/t/makie-ecdfplot-color/116675 "2024-07-05T21:22:05Z")

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Hi everyone, I have problems with changing the curves color in Makie ecdfplot: f14 = Figure(size = (700, 450)) ax14 = Axis(f14\[1,1\], title = "Cumulative distribution long axis orientation, n = $(nrow(filtered\_df))", xla…

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## [Integration of |∇p|^2](https://discourse.julialang.org/t/integration-of-p-2/116671)

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**Author:** [@Banan\_alkafri](https://discourse.julialang.org/u/Banan_alkafri)\
**Replies:** 3\
**Last updated:** [July 5, 2024, 9:20pm UTC](https://discourse.julialang.org/t/integration-of-p-2/116671 "2024-07-05T21:20:47Z")

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I want to create a function that integrates the magnitude of the gradient of a polynomial with 2 variables squared. I created a generic polynomial using monomials and calculated |∇p|^2 and now i have a polynomial that co…

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## [Why some variables in a package are not properly included when calling that package](https://discourse.julialang.org/t/why-some-variables-in-a-package-are-not-properly-included-when-calling-that-package/116638)

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**Author:** [@Khashayar-Neshat](https://discourse.julialang.org/u/Khashayar-Neshat)\
**Replies:** 15\
**Last updated:** [July 5, 2024, 9:05pm UTC](https://discourse.julialang.org/t/why-some-variables-in-a-package-are-not-properly-included-when-calling-that-package/116638 "2024-07-05T21:05:29Z")

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I do not understand why some functions and variables are not included properly in my project, and as a result, I get an error: UndefVarError: something not defined. I am working with SymbolicWedderburn.jl (@abulak ). Ho…

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## [Error while installing a package](https://discourse.julialang.org/t/error-while-installing-a-package/116678)

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**Author:** [@pragy\_r](https://discourse.julialang.org/u/pragy_r)\
**Replies:** 1\
**Last updated:** [July 5, 2024, 8:35pm UTC](https://discourse.julialang.org/t/error-while-installing-a-package/116678 "2024-07-05T20:35:36Z")

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Hi all, I am very new to julia and i have been trying to install this package - PANDA. all but one of its dependencies are not getting precompiled and installed. This is the error message that I am getting: 70 dependen…

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## [ODE solver trying to access index \[0\] when running Graph NODEs](https://discourse.julialang.org/t/ode-solver-trying-to-access-index-0-when-running-graph-nodes/115764)

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**Author:** [@jarroyoe](https://discourse.julialang.org/u/jarroyoe)\
**Replies:** 6\
**Last updated:** [July 5, 2024, 6:53pm UTC](https://discourse.julialang.org/t/ode-solver-trying-to-access-index-0-when-running-graph-nodes/115764 "2024-07-05T18:53:40Z")

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I’m trying to model Graph NODEs integrating GraphNeuralNetworks.jl and OrdinaryDiffEq.jl. I am trying to learn both the neural network parameters as well as the weights of the edges, so I have to manually modify the Flux …

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## [Solving coupled PDEs with implicit time-dependence](https://discourse.julialang.org/t/solving-coupled-pdes-with-implicit-time-dependence/115191)

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**Author:** [@Danny\_Han](https://discourse.julialang.org/u/Danny_Han)\
**Replies:** 1\
**Last updated:** [July 5, 2024, 6:26pm UTC](https://discourse.julialang.org/t/solving-coupled-pdes-with-implicit-time-dependence/115191 "2024-07-05T18:26:57Z")

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I’m trying to implement a time-dependent Landau model for ferroelectric materials on a 2D cartesian domain, where the time-dependent Landau equation \\frac{dP}{dt} = -\\eta (\\alpha P+\\beta P^3 + \\gamma P^5 - k\_x \\frac{\\pa…

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## [MethodOfLines.jl not working](https://discourse.julialang.org/t/methodoflines-jl-not-working/116346)

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**Author:** [@Kaguro](https://discourse.julialang.org/u/Kaguro)\
**Replies:** 6\
**Last updated:** [July 5, 2024, 6:25pm UTC](https://discourse.julialang.org/t/methodoflines-jl-not-working/116346 "2024-07-05T18:25:58Z")

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Hello All. I am to solve a PDE numerically (called Klein-Kramers-Chandrasekhar equation KKC eqn ) for some parameters. I followed the getting started instructions intro and after writing the step for prob = discretize…

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## [Detecting Function Composition in Symbolics.jl](https://discourse.julialang.org/t/detecting-function-composition-in-symbolics-jl/115885)

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**Author:** [@nicrummel](https://discourse.julialang.org/u/nicrummel)\
**Replies:** 5\
**Last updated:** [July 5, 2024, 6:06pm UTC](https://discourse.julialang.org/t/detecting-function-composition-in-symbolics-jl/115885 "2024-07-05T18:06:05Z")

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Motivation I have a system of differential equations \\dot{U} = F(U,w) where U\\in \\mathbb{R}^D are dependent variables and w \\in\\mathbb{R}^J are parameters. And I can quickly build (in-place) Julia functions from Symbol…

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## [How to supplement a function for equality check when joining the DataFrames](https://discourse.julialang.org/t/how-to-supplement-a-function-for-equality-check-when-joining-the-dataframes/116666)

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**Author:** [@Gregstrq](https://discourse.julialang.org/u/Gregstrq)\
**Replies:** 2\
**Last updated:** [July 5, 2024, 5:33pm UTC](https://discourse.julialang.org/t/how-to-supplement-a-function-for-equality-check-when-joining-the-dataframes/116666 "2024-07-05T17:33:28Z")

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I have two DataFrames, which both contain the same key, but with different accuracies: I load two datasets, which contain the physical properties of some physical objects. The first dataset contains one subset of the pro…

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## [JET: are union incurred runtime dispatches really happening?](https://discourse.julialang.org/t/jet-are-union-incurred-runtime-dispatches-really-happening/116635)

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**Author:** [@filchristou](https://discourse.julialang.org/u/filchristou)\
**Replies:** 10\
**Last updated:** [July 5, 2024, 11:01am UTC](https://discourse.julialang.org/t/jet-are-union-incurred-runtime-dispatches-really-happening/116635 "2024-07-05T11:01:46Z")

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I tend to think that the compiler is pretty smart and staff like union-splitting are handled gracefully under the hood. However, I was currently using JET.@code\_opt and I saw some dynamic dispatch where I thought there …

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## [Move Colorbar to left](https://discourse.julialang.org/t/move-colorbar-to-left/116667)

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**Author:** [@Midez](https://discourse.julialang.org/u/Midez)\
**Replies:** 4\
**Last updated:** [July 5, 2024, 3:43pm UTC](https://discourse.julialang.org/t/move-colorbar-to-left/116667 "2024-07-05T15:43:55Z")

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Hello, is it possible moving the Colorbar from left to right, that is to say switching it with the y axis ? I have nothing found in the docs as to how achieving this.

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## [Project Environment and Package Issues](https://discourse.julialang.org/t/project-environment-and-package-issues/116641)

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**Author:** [@c-allergic](https://discourse.julialang.org/u/c-allergic)\
**Replies:** 3\
**Last updated:** [July 5, 2024, 2:54pm UTC](https://discourse.julialang.org/t/project-environment-and-package-issues/116641 "2024-07-05T14:54:03Z")

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I just pull an undergoing project on GitHub and its name is “ProblemReductions.jl”. I tried to run the example given in the directory “example/landscape”. There are Project.toml which clearifies the package that is usefu…

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## [Boundary condition in Trixi with imported mesh with P4estmesh()](https://discourse.julialang.org/t/boundary-condition-in-trixi-with-imported-mesh-with-p4estmesh/116528)

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**Author:** [@Kelian\_Renoux](https://discourse.julialang.org/u/Kelian_Renoux)\
**Replies:** 6\
**Last updated:** [July 5, 2024, 2:29pm UTC](https://discourse.julialang.org/t/boundary-condition-in-trixi-with-imported-mesh-with-p4estmesh/116528 "2024-07-05T14:29:35Z")

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Hello, i have a special case in Trixi where I want to use boundary conditions with a mesh imported via GMSH, i was wondering if it was possible with a Trixi function ? Thanks

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## [Decidable Subtyping of Existential Types for Julia](https://discourse.julialang.org/t/decidable-subtyping-of-existential-types-for-julia/116423)

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**Author:** [@xiaoxi](https://discourse.julialang.org/u/xiaoxi)\
**Replies:** 1\
**Last updated:** [July 5, 2024, 2:17pm UTC](https://discourse.julialang.org/t/decidable-subtyping-of-existential-types-for-julia/116423 "2024-07-05T14:17:47Z")

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This week, during PLDI 2024, there was a talk on how to make Julia’s subtyping decidable. Congratulations to the four authors!

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## [PackageCompiler: could not load symbol "\_\_bid32\_from\_string"](https://discourse.julialang.org/t/packagecompiler-could-not-load-symbol-bid32-from-string/116646)

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**Author:** [@jehrensb](https://discourse.julialang.org/u/jehrensb)\
**Replies:** 1\
**Last updated:** [July 5, 2024, 2:08pm UTC](https://discourse.julialang.org/t/packagecompiler-could-not-load-symbol-bid32-from-string/116646 "2024-07-05T14:08:45Z")

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I’m trying to compile an application with PackageCompiler.create\_app. While compiling the nonincremental system image, there’s an error: ⡆ \[01m:14s\] PackageCompiler: compiling nonincremental system imagecould not load …

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## [Significant Difference in Runtime Between Specified and Unspecified Noise](https://discourse.julialang.org/t/significant-difference-in-runtime-between-specified-and-unspecified-noise/115745)

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**Author:** [@Sepanta-Mssvn](https://discourse.julialang.org/u/Sepanta-Mssvn)\
**Replies:** 5\
**Last updated:** [July 5, 2024, 1:41pm UTC](https://discourse.julialang.org/t/significant-difference-in-runtime-between-specified-and-unspecified-noise/115745 "2024-07-05T13:41:13Z")

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There seems to be a significant difference in runtime when the noise process is specified. In the simple case of: using DifferentialEquations using BenchmarkTools global T = 10.0::Float64 f(du, u, p, t) = du .= 0.0+0.…

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## [Some questions about \`Plots\`](https://discourse.julialang.org/t/some-questions-about-plots/116649)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 7\
**Last updated:** [July 5, 2024, 12:34pm UTC](https://discourse.julialang.org/t/some-questions-about-plots/116649 "2024-07-05T12:34:29Z")

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How to make the title closer to the figure? How to make the xlabel/ylabel and the tick numbers closer to the axis? In some cases, if I set the size of the combined figure, some of xlables or ylabels near to the border w…

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## [Compat bound violations with stacked environements](https://discourse.julialang.org/t/compat-bound-violations-with-stacked-environements/116492)

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**Author:** [@haberdashPI](https://discourse.julialang.org/u/haberdashPI)\
**Replies:** 1\
**Last updated:** [July 5, 2024, 12:33pm UTC](https://discourse.julialang.org/t/compat-bound-violations-with-stacked-environements/116492 "2024-07-05T12:33:47Z")

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Every once in a while I run into annoying issues with invalidated pre-compilation (requiring re-generating these caching every-time I load Julia for the same project). This always turns out to be an issue with my base en…

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## [Interactivity of Makie plots](https://discourse.julialang.org/t/interactivity-of-makie-plots/53610)

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**Author:** [@TheLateKronos](https://discourse.julialang.org/u/TheLateKronos)\
**Replies:** 10\
**Last updated:** [July 5, 2024, 12:31pm UTC](https://discourse.julialang.org/t/interactivity-of-makie-plots/53610 "2024-07-05T12:31:00Z")

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So I have read several places that Makie plots are interactive. I take that to mean that I can mouse over them to highlight points and their values, and that I can zoom and pan. This does however not work with plots crea…

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## [Trouble setting up PPO with reinforcementlearning](https://discourse.julialang.org/t/trouble-setting-up-ppo-with-reinforcementlearning/116653)

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**Author:** [@clempe](https://discourse.julialang.org/u/clempe)\
**Replies:** 0\
**Last updated:** [July 5, 2024, 10:01am UTC](https://discourse.julialang.org/t/trouble-setting-up-ppo-with-reinforcementlearning/116653 "2024-07-05T10:01:13Z")

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I’m new to julia reinforcementlearning, trying to run some experiments with PPO. Tried a lot of things, somehow can’t get ActorCritic to work. Maybe someone could give me a tip? Julia Version 1.10.4 Commit 48d4fd4843 (2…

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## [Best, most idiomatic way to implement Bayesian Differential Equations in Turing?](https://discourse.julialang.org/t/best-most-idiomatic-way-to-implement-bayesian-differential-equations-in-turing/116608)

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**Author:** [@JasonPekos](https://discourse.julialang.org/u/JasonPekos)\
**Replies:** 3\
**Last updated:** [July 5, 2024, 11:08am UTC](https://discourse.julialang.org/t/best-most-idiomatic-way-to-implement-bayesian-differential-equations-in-turing/116608 "2024-07-05T11:08:54Z")

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Hi! As part of GSOC, I’m working on porting the posteriordb benchmarking suite to Turing. This includes a number of Bayesian differential equations. I’m really interested in putting Julia’s “best foot forwards”, so I’m …

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## [Lazy constraint](https://discourse.julialang.org/t/lazy-constraint/116650)

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**Author:** [@ahmad88](https://discourse.julialang.org/u/ahmad88)\
**Replies:** 1\
**Last updated:** [July 5, 2024, 9:55am UTC](https://discourse.julialang.org/t/lazy-constraint/116650 "2024-07-05T09:55:32Z")

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I am trying to use benders decomposition with callback, at some point I have to add a lazy constraint to a model as follows MOI.submit(model, MOI.LazyConstraint(cb\_data), cut) What is the way if I want to remove the c…

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## [Can the developer encrypt their source code?](https://discourse.julialang.org/t/can-the-developer-encrypt-their-source-code/116639)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 2\
**Last updated:** [July 5, 2024, 9:20am UTC](https://discourse.julialang.org/t/can-the-developer-encrypt-their-source-code/116639 "2024-07-05T09:20:11Z")

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Is it possible in Julia for the developer to encrypt a package (registered or unregistered) in order that the source code is not open to the user but can be used by the user?

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## [Importing local python code directory function in Julia](https://discourse.julialang.org/t/importing-local-python-code-directory-function-in-julia/116315)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 24\
**Last updated:** [July 5, 2024, 3:37am UTC](https://discourse.julialang.org/t/importing-local-python-code-directory-function-in-julia/116315 "2024-07-05T03:37:04Z")

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Please help me in importing local python code directory within Julia. I am analyzing astrophysical simulation data output from Atheena++. I am writing code in julia to plot data manipulated by python script. My code is …

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## [Frame of the chart disappears when increasing chart size](https://discourse.julialang.org/t/frame-of-the-chart-disappears-when-increasing-chart-size/116614)

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**Author:** [@meccal](https://discourse.julialang.org/u/meccal)\
**Replies:** 1\
**Last updated:** [July 4, 2024, 11:12pm UTC](https://discourse.julialang.org/t/frame-of-the-chart-disappears-when-increasing-chart-size/116614 "2024-07-04T23:12:32Z")

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Hi everyone, I am trying to produce a simple line chart like plot(x, y, , xlabel=“x”, ylabel=“y”, color=:black, linewidth=20, linestyle=:dot, grid=false, legend=false, yticks=y\_tick\_positions, tickfontsize=120, labelfo…

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## [UnicodeREPL.jl - Type any Unicode character in the REPL](https://discourse.julialang.org/t/unicoderepl-jl-type-any-unicode-character-in-the-repl/111434)

<div class="topic-metadata">

**Author:** [@GHTaarn](https://discourse.julialang.org/u/GHTaarn)\
**Replies:** 6\
**Last updated:** [July 4, 2024, 9:57pm UTC](https://discourse.julialang.org/t/unicoderepl-jl-type-any-unicode-character-in-the-repl/111434 "2024-07-04T21:57:15Z")

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I would like to announce the new package UnicodeREPL.jl which is a REPL enhancement for tab completing any Unicode codepoint to its Unicode symbol. This is useful if you want Unicode symbols that are not in the standard …

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