# Latest

**URL:** https://discourse.julialang.org/latest.md?page=208

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

**Page:** 209

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## [How can I find out which packages are installed in the global environment?](https://discourse.julialang.org/t/how-can-i-find-out-which-packages-are-installed-in-the-global-environment/126575)

<div class="topic-metadata">

**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 2\
**Last updated:** [March 5, 2025, 8:20pm UTC](https://discourse.julialang.org/t/how-can-i-find-out-which-packages-are-installed-in-the-global-environment/126575 "2025-03-05T20:20:34Z")

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If I have launched Julia with: julia --project I can find out the packages of the project with: using Pkg keys(Pkg.project().dependencies) But how can I find out which packages are installed globally?

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## [\[ANN\] Introducing BaremetalPi.jl - A package to access Raspberry Pi peripherals without external libraries](https://discourse.julialang.org/t/ann-introducing-baremetalpi-jl-a-package-to-access-raspberry-pi-peripherals-without-external-libraries/41417)

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**Author:** [@Ronis\_BR](https://discourse.julialang.org/u/Ronis_BR)\
**Replies:** 61\
**Last updated:** [March 5, 2025, 5:56pm UTC](https://discourse.julialang.org/t/ann-introducing-baremetalpi-jl-a-package-to-access-raspberry-pi-peripherals-without-external-libraries/41417 "2025-03-05T17:56:28Z")

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Hi! As I posted here: Have a try Julia v1.4.2 for arm32bit, I was programming a package for Julia to access the Raspberry Pi peripherals without requiring external libraries. Currently, we have some nice packages to us…

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## [Rust x Julia Eindhoven Local meetup](https://discourse.julialang.org/t/rust-x-julia-eindhoven-local-meetup/126588)

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**Author:** [@miguelraz](https://discourse.julialang.org/u/miguelraz)\
**Replies:** 0\
**Last updated:** [March 5, 2025, 4:41pm UTC](https://discourse.julialang.org/t/rust-x-julia-eindhoven-local-meetup/126588 "2025-03-05T16:41:26Z")

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Hey all, the first Rust x Julia Eindhoven Local Meetup has been announced We’re hoping to build some cool bridges steal some talented tooling devs and share great ideas across communities. cc @Jorge\_Vieyra and @CityJ…

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## [How to make vegalite read my topojson file?](https://discourse.julialang.org/t/how-to-make-vegalite-read-my-topojson-file/34546)

<div class="topic-metadata">

**Author:** [@Aizzaac](https://discourse.julialang.org/u/Aizzaac)\
**Replies:** 18\
**Last updated:** [March 5, 2025, 3:39pm UTC](https://discourse.julialang.org/t/how-to-make-vegalite-read-my-topojson-file/34546 "2025-03-05T15:39:15Z")

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I have a topojson file located in this path: "/home/juliana/roc/Data/Topojson/disa\_ONT\_region" I want to make a choropleth map, but I do not know how to call that file into my code. I know it has to go in “values” I h…

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## [\[ANN\] Arianna.jl: A Modular Markov Chain Monte Carlo Framework](https://discourse.julialang.org/t/ann-arianna-jl-a-modular-markov-chain-monte-carlo-framework/126581)

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**Author:** [@romainljsimon](https://discourse.julialang.org/u/romainljsimon)\
**Replies:** 0\
**Last updated:** [March 5, 2025, 12:34pm UTC](https://discourse.julialang.org/t/ann-arianna-jl-a-modular-markov-chain-monte-carlo-framework/126581 "2025-03-05T12:34:16Z")

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Hi everyone! Together with @leonardogalliano, we’re excited to release Arianna.jl, a Markov Chain Monte Carlo (MCMC) framework designed for flexibility and customization. Unlike black-box simulators, Arianna.jl lets …

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## [Julia LTS v1.10.9 testing period](https://discourse.julialang.org/t/julia-lts-v1-10-9-testing-period/126578)

<div class="topic-metadata">

**Author:** [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)\
**Replies:** 0\
**Last updated:** [March 5, 2025, 11:44am UTC](https://discourse.julialang.org/t/julia-lts-v1-10-9-testing-period/126578 "2025-03-05T11:44:32Z")

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The release-1.10 branch on the Julia repository now contains the set of commits we’re planning to tag as v1.10.9. The list of commits included since v1.10.8 is available here. As a patch release, it should be non-breakin…

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## [How to find the default webbrowser on Windows and Mac?](https://discourse.julialang.org/t/how-to-find-the-default-webbrowser-on-windows-and-mac/126573)

<div class="topic-metadata">

**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 1\
**Last updated:** [March 5, 2025, 11:01am UTC](https://discourse.julialang.org/t/how-to-find-the-default-webbrowser-on-windows-and-mac/126573 "2025-03-05T11:01:20Z")

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In the help menu of our app we do: url = "https://albatross-kite-transport.github.io/VortexStepMethod.jl/dev" run(\`xdg-open $url\`) to open the default web browser with the given URL. This works on Linux, but how can t…

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## [Versions of the documentation with Documenter.jl](https://discourse.julialang.org/t/versions-of-the-documentation-with-documenter-jl/126548)

<div class="topic-metadata">

**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 2\
**Last updated:** [March 5, 2025, 6:36am UTC](https://discourse.julialang.org/t/versions-of-the-documentation-with-documenter-jl/126548 "2025-03-05T06:36:26Z")

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We made several new releases of our package VortexStepMethod.jl , but they do not appear in the menu of the documentation. See: Since v0.1 we also released 1.0 and 1.0.1 and 1.1. Any idea how to make new versions ap…

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## [\[ANN\] TerminalSystemMonitor.jl: Displays usage of CPU, RAM, and optionally GPU](https://discourse.julialang.org/t/ann-terminalsystemmonitor-jl-displays-usage-of-cpu-ram-and-optionally-gpu/125678)

<div class="topic-metadata">

**Author:** [@terasakisatoshi](https://discourse.julialang.org/u/terasakisatoshi)\
**Replies:** 6\
**Last updated:** [March 5, 2025, 3:48am UTC](https://discourse.julialang.org/t/ann-terminalsystemmonitor-jl-displays-usage-of-cpu-ram-and-optionally-gpu/125678 "2025-03-05T03:48:18Z")

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Introduction This Julia package TerminalSystemMonitor.jl displays CPU and RAM usage information on your computer. It should work on many platforms such as Windows, macOS and Linux (including RaspberryPi 4,5 with 64bit O…

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## [Help with a new routine to add labels to the tail of each plot](https://discourse.julialang.org/t/help-with-a-new-routine-to-add-labels-to-the-tail-of-each-plot/126484)

<div class="topic-metadata">

**Author:** [@dgleich](https://discourse.julialang.org/u/dgleich)\
**Replies:** 9\
**Last updated:** [March 5, 2025, 2:00am UTC](https://discourse.julialang.org/t/help-with-a-new-routine-to-add-labels-to-the-tail-of-each-plot/126484 "2025-03-05T02:00:32Z")

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I’m trying to implement a ‘tail\_labels’ function that labels the tail of the plot with the text label. It handles all the messy layout details for you. Here is an example from a prototype: But there are a bunch of t…

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## [Bug: Value of module level global variable set from ENV does not work](https://discourse.julialang.org/t/bug-value-of-module-level-global-variable-set-from-env-does-not-work/126525)

<div class="topic-metadata">

**Author:** [@world-peace](https://discourse.julialang.org/u/world-peace)\
**Replies:** 10\
**Last updated:** [March 4, 2025, 11:47pm UTC](https://discourse.julialang.org/t/bug-value-of-module-level-global-variable-set-from-env-does-not-work/126525 "2025-03-04T23:47:31Z")

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Example code: module example global\_const\_variable::String = get(ENV, "GLOBAL\_CONST", "hello\_world") function print\_global\_const\_variable() global global\_const\_variable println(global\_const\_variable) end end …

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## [My Julia code is slower than Python and Matlab](https://discourse.julialang.org/t/my-julia-code-is-slower-than-python-and-matlab/126476)

<div class="topic-metadata">

**Author:** [@Yuntian\_Zhao](https://discourse.julialang.org/u/Yuntian_Zhao)\
**Replies:** 26\
**Last updated:** [March 4, 2025, 7:40pm UTC](https://discourse.julialang.org/t/my-julia-code-is-slower-than-python-and-matlab/126476 "2025-03-04T19:40:15Z")

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I am solving an HJB equation in economics using Julia, but I am experiencing performance issues. My Julia implementation takes about 90 seconds, slower than Python (~76s) and significantly slower than MATLAB (~39s). I’m …

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## [Autodiffing through DE.jl ODEproblem wrt neural network parameters in reverse mode](https://discourse.julialang.org/t/autodiffing-through-de-jl-odeproblem-wrt-neural-network-parameters-in-reverse-mode/126537)

<div class="topic-metadata">

**Author:** [@dameka](https://discourse.julialang.org/u/dameka)\
**Replies:** 1\
**Last updated:** [March 4, 2025, 10:12pm UTC](https://discourse.julialang.org/t/autodiffing-through-de-jl-odeproblem-wrt-neural-network-parameters-in-reverse-mode/126537 "2025-03-04T22:12:46Z")

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I’m trying to take the gradient of a loss function (which includes solving an ODEproblem with DifferentialEquations.jl) with respect to the parameters of a neural network. I was able to get ForwardDiff working for this, …

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## [Julia developing workflow with vim and terminal](https://discourse.julialang.org/t/julia-developing-workflow-with-vim-and-terminal/126242)

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**Author:** [@danieleavitabile](https://discourse.julialang.org/u/danieleavitabile)\
**Replies:** 20\
**Last updated:** [March 4, 2025, 8:29pm UTC](https://discourse.julialang.org/t/julia-developing-workflow-with-vim-and-terminal/126242 "2025-03-04T20:29:06Z")

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Dear All, I edit files using vim, and run Julia in a terminal split, next to my editor. I am sure I won’t be the first one who adopts this setup. My workflow is currently the following: I edit a driver.jl file that s…

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## [Makie density2d scatter plot](https://discourse.julialang.org/t/makie-density2d-scatter-plot/65869)

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**Author:** [@Humphrey\_Lee](https://discourse.julialang.org/u/Humphrey_Lee)\
**Replies:** 10\
**Last updated:** [March 4, 2025, 8:08pm UTC](https://discourse.julialang.org/t/makie-density2d-scatter-plot/65869 "2025-03-04T20:08:03Z")

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I tried to reproduce Gadfly’s density2d in Makie as in the example Density2D. Appreciate your help. Thanks.

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## [Symbolic-Numeric Compiler Developer](https://discourse.julialang.org/t/symbolic-numeric-compiler-developer/121431)

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**Author:** [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Replies:** 2\
**Last updated:** [March 4, 2025, 8:05pm UTC](https://discourse.julialang.org/t/symbolic-numeric-compiler-developer/121431 "2025-03-04T20:05:33Z")

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Interested in building acausal modeling systems, compilers for hierarchical modeling, symbolic computing, and generating fast code for differential-algebraic equations (DAEs?) We have a position open for symbolic-numeric…

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## [\[ANN\] DeviceLayout.jl - CAD for quantum integrated circuits (and more?)](https://discourse.julialang.org/t/ann-devicelayout-jl-cad-for-quantum-integrated-circuits-and-more/126502)

<div class="topic-metadata">

**Author:** [@gpeairs](https://discourse.julialang.org/u/gpeairs)\
**Replies:** 3\
**Last updated:** [March 4, 2025, 7:59pm UTC](https://discourse.julialang.org/t/ann-devicelayout-jl-cad-for-quantum-integrated-circuits-and-more/126502 "2025-03-04T19:59:54Z")

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Hello! DeviceLayout.jl is a new package for computer-aided design of superconducting quantum integrated circuits, developed at the AWS Center for Quantum Computing. The package supports the generation of 2D layouts and 3…

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## [Incremental Documentation.jl](https://discourse.julialang.org/t/incremental-documentation-jl/126539)

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**Author:** [@bernardofpc](https://discourse.julialang.org/u/bernardofpc)\
**Replies:** 0\
**Last updated:** [March 4, 2025, 6:34pm UTC](https://discourse.julialang.org/t/incremental-documentation-jl/126539 "2025-03-04T18:34:30Z")

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In a relatively large project, the documentation itself can be very large. Is there any Makefile-like mechanism to have “incremental compilation” of docs/src so that only files that have been touched (and their dependen…

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## [Could type ambiguity based on \`Union\` of concrete types be eliminated?](https://discourse.julialang.org/t/could-type-ambiguity-based-on-union-of-concrete-types-be-eliminated/126221)

<div class="topic-metadata">

**Author:** [@frankwswang](https://discourse.julialang.org/u/frankwswang)\
**Replies:** 4\
**Last updated:** [March 4, 2025, 6:03pm UTC](https://discourse.julialang.org/t/could-type-ambiguity-based-on-union-of-concrete-types-be-eliminated/126221 "2025-03-04T18:03:47Z")

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MWE: julia\> foo(::Union{Int, Float64}, ::AbstractArray, ::AbstractArray) = 1 foo (generic function with 1 method) julia\> foo(::Int, ::Any, ::Any) = 2 foo (generic function with 2 methods) julia\> foo(1, \[1\], \[1\]) ERROR…

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## [\[ANN\] Makie@0.22.2](https://discourse.julialang.org/t/ann-makie-0-22-2/126389)

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**Author:** [@sdanisch](https://discourse.julialang.org/u/sdanisch)\
**Replies:** 1\
**Last updated:** [March 4, 2025, 4:44pm UTC](https://discourse.julialang.org/t/ann-makie-0-22-2/126389 "2025-03-04T16:44:53Z")

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We just released Makie@0.22.2 :slight\_smile: It contains many fixes and improvements. Read more about it in the blogpost: https://makie.org/website/blogposts/v0.22.2/

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## [Interpolate 2d function](https://discourse.julialang.org/t/interpolate-2d-function/96914)

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**Author:** [@roi.holtzman](https://discourse.julialang.org/u/roi.holtzman)\
**Replies:** 14\
**Last updated:** [March 4, 2025, 4:29pm UTC](https://discourse.julialang.org/t/interpolate-2d-function/96914 "2025-03-04T16:29:32Z")

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I want to interpolate 2d data. I have a function f(x, y) that is sampled as follows. For any y value in some array y\_arr, I have the a set of points x\_arr. Note that x\_arr is different for any y, and even the boundaries …

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## [Chained keyword assignment in function call leaks scope](https://discourse.julialang.org/t/chained-keyword-assignment-in-function-call-leaks-scope/126531)

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**Author:** [@ncxst](https://discourse.julialang.org/u/ncxst)\
**Replies:** 1\
**Last updated:** [March 4, 2025, 3:29pm UTC](https://discourse.julialang.org/t/chained-keyword-assignment-in-function-call-leaks-scope/126531 "2025-03-04T15:29:08Z")

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I tried to do a chained keyword assignment in a function call and got the following behavior julia\> function params(;kwargs...) for kw in kwargs println(kw) end end params (ge…

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## [\[ANN\] EcologicalNetworksDynamics.jl: simulate the temporal dynamics of complex ecological networks](https://discourse.julialang.org/t/ann-ecologicalnetworksdynamics-jl-simulate-the-temporal-dynamics-of-complex-ecological-networks/112130)

<div class="topic-metadata">

**Author:** [@ismael-lajaaiti](https://discourse.julialang.org/u/ismael-lajaaiti)\
**Replies:** 1\
**Last updated:** [March 4, 2025, 3:41pm UTC](https://discourse.julialang.org/t/ann-ecologicalnetworksdynamics-jl-simulate-the-temporal-dynamics-of-complex-ecological-networks/112130 "2025-03-04T15:41:33Z")

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Together with @iago-lito, we’re delighted to present our new package. In short, EcologicalNetworksDynamics.jl offers a robust toolkit in Julia for researchers, and curious Julia users, to simulate and analyse the tem…

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## [Create named tuple in C to pass to jl\_call](https://discourse.julialang.org/t/create-named-tuple-in-c-to-pass-to-jl-call/63547)

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**Author:** [@kkaravokyri](https://discourse.julialang.org/u/kkaravokyri)\
**Replies:** 2\
**Last updated:** [March 4, 2025, 2:29pm UTC](https://discourse.julialang.org/t/create-named-tuple-in-c-to-pass-to-jl-call/63547 "2025-03-04T14:29:56Z")

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I’m embedding Julia in C and I would like to be able to create named tuples with the number of filelds, their names and types being determined at runtime. I am currently able to create a standard tuple like this: jl\_va…

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## [Investigate long compile times](https://discourse.julialang.org/t/investigate-long-compile-times/119019)

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**Author:** [@rveltz](https://discourse.julialang.org/u/rveltz)\
**Replies:** 12\
**Last updated:** [March 4, 2025, 11:44am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019 "2025-03-04T11:44:13Z")

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Hi, Can someone give me hint on why the following call takes ~2mn to compile please? If you have an idea of the culprit and suggestions, I’d be very happy to hear them :smiley: Thanks a lot for your help, fold\_po\_coll…

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## [Makie scatter and errorbar combine in legend?](https://discourse.julialang.org/t/makie-scatter-and-errorbar-combine-in-legend/126424)

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**Author:** [@jling](https://discourse.julialang.org/u/jling)\
**Replies:** 4\
**Last updated:** [March 4, 2025, 10:57am UTC](https://discourse.julialang.org/t/makie-scatter-and-errorbar-combine-in-legend/126424 "2025-03-04T10:57:50Z")

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Since errorbar does not take marker option, in order to make a plot the documentation recommend something like: errorbars!(xs, ys, higherrors, color = :red) # same low and high error # plot position scatters so low and…

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## [How should the scope of variables be embedded in ModelingToolkit?](https://discourse.julialang.org/t/how-should-the-scope-of-variables-be-embedded-in-modelingtoolkit/126373)

<div class="topic-metadata">

**Author:** [@ysyecust](https://discourse.julialang.org/u/ysyecust)\
**Replies:** 2\
**Last updated:** [March 4, 2025, 5:27am UTC](https://discourse.julialang.org/t/how-should-the-scope-of-variables-be-embedded-in-modelingtoolkit/126373 "2025-03-04T05:27:23Z")

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When using ModelingToolkit to model and using NonlinearSolve to solve, I find that the variable range I have set seems to be ineffective. @variables z\[1:numcomp\] \[bounds = (0,1),guess=0.2\] @variables x\[1:numcomp\] \[boun…

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## [Making a button grid with Makie?](https://discourse.julialang.org/t/making-a-button-grid-with-makie/126468)

<div class="topic-metadata">

**Author:** [@Hezzeki](https://discourse.julialang.org/u/Hezzeki)\
**Replies:** 4\
**Last updated:** [March 4, 2025, 5:02am UTC](https://discourse.julialang.org/t/making-a-button-grid-with-makie/126468 "2025-03-04T05:02:16Z")

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I wanted to make a button grid that parallels the physical device I am plotting against, I am currently using code like this for the button section: ... fig\_volt = Figure() ... elec\_vis = fig\_volt\[2, 1:2\] = GridLayout(h…

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## [Non-constant types in out-of-place ODE solve with multshooting?](https://discourse.julialang.org/t/non-constant-types-in-out-of-place-ode-solve-with-multshooting/126482)

<div class="topic-metadata">

**Author:** [@cbilllingham1983](https://discourse.julialang.org/u/cbilllingham1983)\
**Replies:** 9\
**Last updated:** [March 4, 2025, 5:00am UTC](https://discourse.julialang.org/t/non-constant-types-in-out-of-place-ode-solve-with-multshooting/126482 "2025-03-04T05:00:30Z")

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Hi, I’m trying to use multiple shooting for my analysis. I’ve been trying to reproduce the simple script shown of the Julia SciML documentation and I keep running into an error: ERROR: Detected non-constant types in an …

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## [Error with maximum likelihood estimation using Optimization](https://discourse.julialang.org/t/error-with-maximum-likelihood-estimation-using-optimization/126370)

<div class="topic-metadata">

**Author:** [@Stephen](https://discourse.julialang.org/u/Stephen)\
**Replies:** 8\
**Last updated:** [March 4, 2025, 1:31am UTC](https://discourse.julialang.org/t/error-with-maximum-likelihood-estimation-using-optimization/126370 "2025-03-04T01:31:40Z")

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using OptimizationOptimisers using Optimization loss(θ) = norm((predict(θ) - data\_train) .\* weights) optf = OptimizationFunction((x, p) -\> loss(x), AutoReverseDiff(true)) optprob = OptimizationProblem(optf, θ) opt = Ada…

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