# Latest

**URL:** https://discourse.julialang.org/latest.md?page=45

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

**Page:** 46

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## [Unsolvable environment with julia-downgrade-compat due to libblastrampoline\_jll on julia v1.9](https://discourse.julialang.org/t/unsolvable-environment-with-julia-downgrade-compat-due-to-libblastrampoline-jll-on-julia-v1-9/136094)

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**Author:** [@jmert](https://discourse.julialang.org/u/jmert)\
**Replies:** 3\
**Last updated:** [March 15, 2026, 5:02pm UTC](https://discourse.julialang.org/t/unsolvable-environment-with-julia-downgrade-compat-due-to-libblastrampoline-jll-on-julia-v1-9/136094 "2026-03-15T17:02:30Z")

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I’m trying to use the julia-downgrade-compat (v2) Github Action in a project, and I’ve run into problems with unresolvable environments for julia v1.9. I’ve tracked down the (apparent) problem to any package chain that …

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## [Ignoring some files in coverage testing when github actions is taking care of continuous integration](https://discourse.julialang.org/t/ignoring-some-files-in-coverage-testing-when-github-actions-is-taking-care-of-continuous-integration/118847)

<div class="topic-metadata">

**Author:** [@Gus\_Hart](https://discourse.julialang.org/u/Gus_Hart)\
**Replies:** 2\
**Last updated:** [March 14, 2026, 11:29pm UTC](https://discourse.julialang.org/t/ignoring-some-files-in-coverage-testing-when-github-actions-is-taking-care-of-continuous-integration/118847 "2026-03-14T23:29:51Z")

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I would like to skip the coverage testing (via codecov.io) for some of the files in a github repo. I’m using github actions to run workflows for continuous integration. The files I want to skip are not part of the primar…

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## [Precompilation error for DynamicGrids](https://discourse.julialang.org/t/precompilation-error-for-dynamicgrids/136187)

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**Author:** [@gannd](https://discourse.julialang.org/u/gannd)\
**Replies:** 3\
**Last updated:** [March 14, 2026, 8:52pm UTC](https://discourse.julialang.org/t/precompilation-error-for-dynamicgrids/136187 "2026-03-14T20:52:20Z")

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I am interested in using DynamicGrids.jl but ran into the following precompilation errors during installation: ? ConstructionBaseExtras ✗ DimensionalData ? ModelParameters ✗ DynamicGrids Precompiling packages finish…

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## [How to display the differential equations from Catalyst.jl?](https://discourse.julialang.org/t/how-to-display-the-differential-equations-from-catalyst-jl/136203)

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**Author:** [@tp2750](https://discourse.julialang.org/u/tp2750)\
**Replies:** 1\
**Last updated:** [March 14, 2026, 5:41pm UTC](https://discourse.julialang.org/t/how-to-display-the-differential-equations-from-catalyst-jl/136203 "2026-03-14T17:41:59Z")

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I can not get this example in Introduction to Catalyst · Catalyst.jl to work. It gives the following error: julia\> odesys = convert(ODESystem, rn) ERROR: MethodError: Cannot \`convert\` an object of type ReactionSystem{C…

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## [MTK & linearization with analysis points](https://discourse.julialang.org/t/mtk-linearization-with-analysis-points/136165)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 9\
**Last updated:** [March 14, 2026, 11:21am UTC](https://discourse.julialang.org/t/mtk-linearization-with-analysis-points/136165 "2026-03-14T11:21:08Z")

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I am playing around with MTK v11 (v11.14) and trying to understand connectors, components + signals. My code now work, and I can specify signals. I use a chemical reactor (liquid phase) as an example, where the temperatu…

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## [Seeking feedback on Chainables before registering it](https://discourse.julialang.org/t/seeking-feedback-on-chainables-before-registering-it/136175)

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**Author:** [@TyronCameron](https://discourse.julialang.org/u/TyronCameron)\
**Replies:** 16\
**Last updated:** [March 14, 2026, 10:18am UTC](https://discourse.julialang.org/t/seeking-feedback-on-chainables-before-registering-it/136175 "2026-03-14T10:18:04Z")

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Hi all I think Chain.jl is a phenomenal package. I’ve submitted a package called Chainables.jl to the General registry, and a registry maintainer suggested I bring up the idea here to get feedback and thoughts. The go…

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## [Self-contained juliac demonstration](https://discourse.julialang.org/t/self-contained-juliac-demonstration/134366)

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**Author:** [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Replies:** 15\
**Last updated:** [March 14, 2026, 5:29am UTC](https://discourse.julialang.org/t/self-contained-juliac-demonstration/134366 "2026-03-14T05:29:34Z")

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I was looking for a completely self-contained tutorial or demonstration on how to use the juliac command line from JuliaC.jl and did not find one. I created this short demonstration below. Steps Step 1: Install Julia 1.…

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## [Residuals from \`StateSpaceModels.jl\`'s auto\_arima](https://discourse.julialang.org/t/residuals-from-statespacemodels-jl-s-auto-arima/92477)

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**Author:** [@Rodrigo\_Zepeda](https://discourse.julialang.org/u/Rodrigo_Zepeda)\
**Replies:** 1\
**Last updated:** [March 14, 2026, 3:33am UTC](https://discourse.julialang.org/t/residuals-from-statespacemodels-jl-s-auto-arima/92477 "2026-03-14T03:33:26Z")

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Hi! I’ve been exploring StateSpaceModels.jl for fitting some time series using auto\_arima. However I’ve run into an issue which might be pretty basic: Is there a way in which one can get the residuals from the fitted mod…

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## [NeuroREPL.jl - Community Interest Check](https://discourse.julialang.org/t/neurorepl-jl-community-interest-check/135805)

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**Author:** [@j\_u](https://discourse.julialang.org/u/j_u)\
**Replies:** 14\
**Last updated:** [March 13, 2026, 9:31pm UTC](https://discourse.julialang.org/t/neurorepl-jl-community-interest-check/135805 "2026-03-13T21:31:50Z")

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Hey, NeuroREPL.jl is a Julia implementation of the Model Context Protocol (MCP) that transforms the Julia REPL into a programmatic API for AI agents. NeuroREPL provides process‑isolated code execution, dual MCP transport…

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## [\[ANN\] LowLevelFEM.jl – assembling PDE systems directly from weak forms](https://discourse.julialang.org/t/ann-lowlevelfem-jl-assembling-pde-systems-directly-from-weak-forms/136136)

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**Author:** [@perebalazs](https://discourse.julialang.org/u/perebalazs)\
**Replies:** 13\
**Last updated:** [March 13, 2026, 8:43pm UTC](https://discourse.julialang.org/t/ann-lowlevelfem-jl-assembling-pde-systems-directly-from-weak-forms/136136 "2026-03-13T20:43:23Z")

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I’ve been working on a small Julia FEM framework called LowLevelFEM.jl. One of the ideas behind the project is to assemble PDE systems directly from their weak form. The core idea is simple: If you know the weak form o…

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## [How to get a numeric value for equations of an MTK system with given numeric inputs](https://discourse.julialang.org/t/how-to-get-a-numeric-value-for-equations-of-an-mtk-system-with-given-numeric-inputs/136191)

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**Author:** [@mark.garnett](https://discourse.julialang.org/u/mark.garnett)\
**Replies:** 2\
**Last updated:** [March 13, 2026, 8:05pm UTC](https://discourse.julialang.org/t/how-to-get-a-numeric-value-for-equations-of-an-mtk-system-with-given-numeric-inputs/136191 "2026-03-13T20:05:34Z")

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Hi all, new to Julia here. I have created a decently sized MTK system out of connected components. (Thermal fluid system, components connected via ports. That part is several hundred lines of code so I don’t want to post…

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## [\[ANN\] GeoIO.jl - Load/save geospatial data in Julia](https://discourse.julialang.org/t/ann-geoio-jl-load-save-geospatial-data-in-julia/106031)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 14\
**Last updated:** [March 13, 2026, 5:11pm UTC](https://discourse.julialang.org/t/ann-geoio-jl-load-save-geospatial-data-in-julia/106031 "2026-03-13T17:11:10Z")

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GeoIO.jl uses various backend packages spread across different Julia organizations to load a universal representation of geospatial data as discussed in the book Geospatial Data Science with Julia. The current list of s…

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## [How to nest ProgressMeter.jl meters?](https://discourse.julialang.org/t/how-to-nest-progressmeter-jl-meters/136179)

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**Author:** [@Datseris](https://discourse.julialang.org/u/Datseris)\
**Replies:** 2\
**Last updated:** [March 13, 2026, 4:58pm UTC](https://discourse.julialang.org/t/how-to-nest-progressmeter-jl-meters/136179 "2026-03-13T16:58:37Z")

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I have a function that takes a couple of hours to run. It operates over a for loop and I have a progress meter from ProgressMeter.jl assigned to it. In the for loop I call another function, that takes about 10 minutes to…

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## [Adding Amazon Datasets to MLDatasets.jl](https://discourse.julialang.org/t/adding-amazon-datasets-to-mldatasets-jl/136154)

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**Author:** [@Uneeb\_Hasan](https://discourse.julialang.org/u/Uneeb_Hasan)\
**Replies:** 3\
**Last updated:** [March 13, 2026, 4:07pm UTC](https://discourse.julialang.org/t/adding-amazon-datasets-to-mldatasets-jl/136154 "2026-03-13T16:07:54Z")

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Hi everyone, I’m new to contributing to the Julia developer community on GitHub, although I’ve been using Julia for some time. I recently opened my first pull request to MLDatasets.jl to add a dataset, and I wanted to b…

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## [PlotlyJS function to plot with up to 4 Y-axes](https://discourse.julialang.org/t/plotlyjs-function-to-plot-with-up-to-4-y-axes/136184)

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**Author:** [@ellocco](https://discourse.julialang.org/u/ellocco)\
**Replies:** 0\
**Last updated:** [March 13, 2026, 1:42pm UTC](https://discourse.julialang.org/t/plotlyjs-function-to-plot-with-up-to-4-y-axes/136184 "2026-03-13T13:42:10Z")

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Below an idea for a PlotlyJS-based user defined plotting function. The function can be called with an x-vector and an y-vector/-array. And it can handle up to 4-y-axes as well. I am happy about comments. """ pri…

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## [How to automatically choose legend location in Makie?](https://discourse.julialang.org/t/how-to-automatically-choose-legend-location-in-makie/136105)

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**Author:** [@Abhro](https://discourse.julialang.org/u/Abhro)\
**Replies:** 5\
**Last updated:** [March 13, 2026, 1:23pm UTC](https://discourse.julialang.org/t/how-to-automatically-choose-legend-location-in-makie/136105 "2026-03-13T13:23:58Z")

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When I plot a series with Makie and label it, how do I get axislegend to automatically pick the empty part of the axis to place the legend in to? Example: (don’t worry about the data source lol) Best explored in a Julia…

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## [Is Claude right on this (a cache size growing analysis)?](https://discourse.julialang.org/t/is-claude-right-on-this-a-cache-size-growing-analysis/135688)

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**Author:** [@joa-quim](https://discourse.julialang.org/u/joa-quim)\
**Replies:** 16\
**Last updated:** [March 13, 2026, 1:19pm UTC](https://discourse.julialang.org/t/is-claude-right-on-this-a-cache-size-growing-analysis/135688 "2026-03-13T13:19:03Z")

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I have been asking Clade to investigate why cache sizes grow so much with with not so much precompiled code. I’m showing here the results of a smaller example (but I have one where “acusations” are heavier when trying to…

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## [VSCode formatter not working](https://discourse.julialang.org/t/vscode-formatter-not-working/136182)

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**Author:** [@acgc99](https://discourse.julialang.org/u/acgc99)\
**Replies:** 4\
**Last updated:** [March 13, 2026, 12:39pm UTC](https://discourse.julialang.org/t/vscode-formatter-not-working/136182 "2026-03-13T12:39:40Z")

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I made this function with a long signature: function foo(Aₙₘ::AbstractMatrix{Float64}, Eₙₘ::AbstractMatrix{Float64}, JAₙₘ::AbstractMatrix{Float64}, JEₙₘ::AbstractMatrix{Float64}, mn::Int, dn::Int, Cₙ::AbstractVector{Flo…

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## [Mutation attempt in \`ContinuousCallback\` when solving \`SDEProblem{StaticArraysCore.SVector{2, Float64}}\`](https://discourse.julialang.org/t/mutation-attempt-in-continuouscallback-when-solving-sdeproblem-staticarrayscore-svector-2-float64/136168)

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**Author:** [@NoFishLikeIan](https://discourse.julialang.org/u/NoFishLikeIan)\
**Replies:** 1\
**Last updated:** [March 13, 2026, 11:37am UTC](https://discourse.julialang.org/t/mutation-attempt-in-continuouscallback-when-solving-sdeproblem-staticarrayscore-svector-2-float64/136168 "2026-03-13T11:37:29Z")

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I have an SDE where the drift function f is defined out-of-place and the state is a StaticArrays.SVector. I need to terminate! the integration using a ContinuousCallback. This raises an error, as the StochasticDiffEq pac…

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## [Numpy vs Julia matrix multiplication](https://discourse.julialang.org/t/numpy-vs-julia-matrix-multiplication/135992)

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**Author:** [@bernardofpc](https://discourse.julialang.org/u/bernardofpc)\
**Replies:** 7\
**Last updated:** [March 13, 2026, 7:42am UTC](https://discourse.julialang.org/t/numpy-vs-julia-matrix-multiplication/135992 "2026-03-13T07:42:30Z")

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I have performed two very simple tests in numpy and julia, and have obtained what I believe are significant differences in performance. This is on Windows 11, CPU: 28 × Intel(R) Core™ i7-14700. Numpy (python 3.12.7): I…

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## [For loop with variable range so slow](https://discourse.julialang.org/t/for-loop-with-variable-range-so-slow/136149)

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**Author:** [@kila\_suelika](https://discourse.julialang.org/u/kila_suelika)\
**Replies:** 17\
**Last updated:** [March 13, 2026, 12:49am UTC](https://discourse.julialang.org/t/for-loop-with-variable-range-so-slow/136149 "2026-03-13T00:49:54Z")

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Recent I find my julia program cost 3.7s for each iteration while c++ only use 0.022s. By test I find for loop with variable range seems make program slow. using SQLite, DataFrames, Statistics, Serialization, Dates, Pri…

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## [Should ownership of XLSX.jl transfer to JuliaData?](https://discourse.julialang.org/t/should-ownership-of-xlsx-jl-transfer-to-juliadata/135023)

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**Author:** [@TimG](https://discourse.julialang.org/u/TimG)\
**Replies:** 13\
**Last updated:** [March 13, 2026, 12:29am UTC](https://discourse.julialang.org/t/should-ownership-of-xlsx-jl-transfer-to-juliadata/135023 "2026-03-13T00:29:13Z")

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XLSX.jl seems to be a well used package. It has 298 stars on GitHub, for example. Unfortunately, the package owner seems no longer to be active, and so active maintenance of the package has more or less stopped. Excel i…

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## [Programmatically create formula](https://discourse.julialang.org/t/programmatically-create-formula/136170)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 4\
**Last updated:** [March 12, 2026, 7:27pm UTC](https://discourse.julialang.org/t/programmatically-create-formula/136170 "2026-03-12T19:27:52Z")

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Hi, I’m wanting to use this formula programatically: f = @formula(var ~ A \* B + (1 | id)) Here’s what the AI recommends, but it doesn’t seem to work: varname = :y # or Symbol("y") f = @formula($(varname) ~ A \* B + (…

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## [Position of the Moon (topocentric) using Astrometry.jl (SOFA/ERFA) routines](https://discourse.julialang.org/t/position-of-the-moon-topocentric-using-astrometry-jl-sofa-erfa-routines/135611)

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**Author:** [@tamasgal](https://discourse.julialang.org/u/tamasgal)\
**Replies:** 15\
**Last updated:** [March 12, 2026, 5:36pm UTC](https://discourse.julialang.org/t/position-of-the-moon-topocentric-using-astrometry-jl-sofa-erfa-routines/135611 "2026-03-12T17:36:34Z")

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OK I finally ask for help here because I am losing my head :face\_with\_spiral\_eyes: I want to calculate the Moon coordinates in an equatorial coordinate system for an observer on Earth at a given time using Astrometry.jl…

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## [Bridging MTK and JuMP](https://discourse.julialang.org/t/bridging-mtk-and-jump/136148)

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**Author:** [@langestefan](https://discourse.julialang.org/u/langestefan)\
**Replies:** 5\
**Last updated:** [March 12, 2026, 2:19pm UTC](https://discourse.julialang.org/t/bridging-mtk-and-jump/136148 "2026-03-12T14:19:53Z")

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I am doing some basic thermal modelling in MTK, and I want to use the resulting discretized dynamics in a JuMP model. I came up with the following PoC: using Pkg Pkg.activate(".") import ModelingToolkit as MTK using J…

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## [Problems with Generating Call Graphs](https://discourse.julialang.org/t/problems-with-generating-call-graphs/136125)

<div class="topic-metadata">

**Author:** [@mcbro](https://discourse.julialang.org/u/mcbro)\
**Replies:** 3\
**Last updated:** [March 12, 2026, 11:05am UTC](https://discourse.julialang.org/t/problems-with-generating-call-graphs/136125 "2026-03-12T11:05:58Z")

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I thought there were tools for doing this in Julia 1.12.5, namely tracing the calls to every function from another function, but I’m stumped so far. The package TraceGraph will not compile due to the use of deprecated …

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## [Best Julia Package for Neural Networks](https://discourse.julialang.org/t/best-julia-package-for-neural-networks/45358)

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**Author:** [@Jojo\_Dad](https://discourse.julialang.org/u/Jojo_Dad)\
**Replies:** 13\
**Last updated:** [March 12, 2026, 10:46am UTC](https://discourse.julialang.org/t/best-julia-package-for-neural-networks/45358 "2026-03-12T10:46:44Z")

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What is currently the best machine learning package in Julia? First, in terms of ease of use for students. Second, in terms of capability & performance for experts?

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## [Automatic package update in startup.jl](https://discourse.julialang.org/t/automatic-package-update-in-startup-jl/136146)

<div class="topic-metadata">

**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 3\
**Last updated:** [March 12, 2026, 9:05am UTC](https://discourse.julialang.org/t/automatic-package-update-in-startup-jl/136146 "2026-03-12T09:05:24Z")

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Thanks to stacked environments, I only have two packages in my global environment: Revise.jl and EmacsVterm.jl. I am wondering if there is a way to keep them automatically updated without (significant) user intervention…

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## [\[ANN\] Announcing GIFTI.jl for neuroimaging data](https://discourse.julialang.org/t/ann-announcing-gifti-jl-for-neuroimaging-data/136158)

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**Author:** [@myersm0](https://discourse.julialang.org/u/myersm0)\
**Replies:** 4\
**Last updated:** [March 12, 2026, 6:38am UTC](https://discourse.julialang.org/t/ann-announcing-gifti-jl-for-neuroimaging-data/136158 "2026-03-12T06:38:29Z")

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I’d like to belatedly announce a small package of mine, GIFTI.jl: A Julia package for working with gifti (.gii) neuroimaging surface files. Unfortunately it’s not register-able in its current form due to naming conflict…

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## [Incorporating Splines and Offset in MixedModels.jl](https://discourse.julialang.org/t/incorporating-splines-and-offset-in-mixedmodels-jl/136025)

<div class="topic-metadata">

**Author:** [@imantha](https://discourse.julialang.org/u/imantha)\
**Replies:** 3\
**Last updated:** [March 12, 2026, 4:23am UTC](https://discourse.julialang.org/t/incorporating-splines-and-offset-in-mixedmodels-jl/136025 "2026-03-12T04:23:57Z")

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Hi, I am working on project that required doing multilevel models and the dataset is quite large (7 million rows). My current implementation is in R but takes quite a bit of time using glmmTMB package. So, I was wonderi…

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