# Latest

**URL:** https://discourse.julialang.org/latest.md?page=156

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

**Page:** 157

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## [AbstractOS](https://discourse.julialang.org/t/abstractos/128010)

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**Author:** [@1m1](https://discourse.julialang.org/u/1m1)\
**Replies:** 4\
**Last updated:** [June 2, 2025, 7:12pm UTC](https://discourse.julialang.org/t/abstractos/128010 "2025-06-02T19:12:40Z")

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An OS built on Julia. It has meaningful synonyms as names. HumanOS, EngineerOS, juliaOS A first time minimally functional core released yesterday after about a quarter day of coding. Changes will still happen, but th…

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## [Disable promotion from Float64 to BigFloat](https://discourse.julialang.org/t/disable-promotion-from-float64-to-bigfloat/129529)

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**Author:** [@iryabink](https://discourse.julialang.org/u/iryabink)\
**Replies:** 20\
**Last updated:** [June 2, 2025, 5:28pm UTC](https://discourse.julialang.org/t/disable-promotion-from-float64-to-bigfloat/129529 "2025-06-02T17:28:26Z")

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Dear community, Recently, I’ve been trying to debug an arbitrary precision algorithms/formulae. I stumbled upon to the fact that it is by default users are allowed to have mixed precision input without any warnings, e.g…

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## [Questions about the DiffEqFlux multiple shooting example](https://discourse.julialang.org/t/questions-about-the-diffeqflux-multiple-shooting-example/129418)

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**Author:** [@julianewbsourcream](https://discourse.julialang.org/u/julianewbsourcream)\
**Replies:** 4\
**Last updated:** [June 2, 2025, 5:17pm UTC](https://discourse.julialang.org/t/questions-about-the-diffeqflux-multiple-shooting-example/129418 "2025-06-02T17:17:28Z")

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Hi, I am training a neural ODE on a periodic function and wanted to try out DiffEqFlux.multiple\_shoot(). After reviewing the online example @ docs.sciml.ai/DiffEqFlux/stable/examples/multiple\_shooting/, I was hoping so…

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## [Why is the margin() function returning NaN?](https://discourse.julialang.org/t/why-is-the-margin-function-returning-nan/129561)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 5\
**Last updated:** [June 2, 2025, 3:13pm UTC](https://discourse.julialang.org/t/why-is-the-margin-function-returning-nan/129561 "2025-06-02T15:13:51Z")

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I have the following linear state space system for 8 m/s wind: julia\> @time include("mwes/mwe\_06.jl") StateSpace{Continuous, Float64} A = 0.0 0.0 0.217328 0.0 -142.50000000000003 -0.162450000…

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## [How to set line color in errorline](https://discourse.julialang.org/t/how-to-set-line-color-in-errorline/129522)

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**Author:** [@PanT12](https://discourse.julialang.org/u/PanT12)\
**Replies:** 2\
**Last updated:** [June 2, 2025, 3:02pm UTC](https://discourse.julialang.org/t/how-to-set-line-color-in-errorline/129522 "2025-06-02T15:02:13Z")

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Hi everyone, I’m trying to set the line color in the errorline function from the StatsPlots package. However, I’ve noticed that I can only change the marker color and not the line color. Does anyone know how to set the …

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## [A new Julia GUI Engine has appeared! Mousetrap.jl is now available](https://discourse.julialang.org/t/a-new-julia-gui-engine-has-appeared-mousetrap-jl-is-now-available/103004)

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**Author:** [@Clemapfel](https://discourse.julialang.org/u/Clemapfel)\
**Replies:** 22\
**Last updated:** [June 2, 2025, 1:24pm UTC](https://discourse.julialang.org/t/a-new-julia-gui-engine-has-appeared-mousetrap-jl-is-now-available/103004 "2025-06-02T13:24:18Z")

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Available here: https://github.com/Clemapfel/mousetrap.jl Features Designed specifically for Julia Choose from 40+ pre-made Widgets, or create your own widgets from scratch Fully abstracted, OpenGL-based rendering engin…

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## [MTK Control System with Current Not Working](https://discourse.julialang.org/t/mtk-control-system-with-current-not-working/129558)

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**Author:** [@madtorresga](https://discourse.julialang.org/u/madtorresga)\
**Replies:** 1\
**Last updated:** [June 2, 2025, 1:17pm UTC](https://discourse.julialang.org/t/mtk-control-system-with-current-not-working/129558 "2025-06-02T13:17:26Z")

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Hello! I’m trying to implement this exact same example, but controlling with the current that passes through the resistance instead of the speed in speed\_sensor.w. @equations begin #... #connect(curre…

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## [Implementing simple quadratic interpolation in Interpolations.jl](https://discourse.julialang.org/t/implementing-simple-quadratic-interpolation-in-interpolations-jl/129555)

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**Author:** [@xor0110](https://discourse.julialang.org/u/xor0110)\
**Replies:** 2\
**Last updated:** [June 2, 2025, 12:32pm UTC](https://discourse.julialang.org/t/implementing-simple-quadratic-interpolation-in-interpolations-jl/129555 "2025-06-02T12:32:59Z")

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I’m looking for advice about implementing simple quadratic and cubic interpolations into Interpolations.jl. These are interpolation methods that should work similar to linear interpolation, with no pre-filtering necessar…

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## [Automating the Equating of Transfer Functions with Symbolic Representations Using SymPy.jl](https://discourse.julialang.org/t/automating-the-equating-of-transfer-functions-with-symbolic-representations-using-sympy-jl/129552)

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**Author:** [@theo.bruelhart](https://discourse.julialang.org/u/theo.bruelhart)\
**Replies:** 3\
**Last updated:** [June 2, 2025, 12:21pm UTC](https://discourse.julialang.org/t/automating-the-equating-of-transfer-functions-with-symbolic-representations-using-sympy-jl/129552 "2025-06-02T12:21:03Z")

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I am currently working on a project where I need to equate a transfer function with its symbolic representations using real components (some resistors and capacitors). Up to this point, I have been manually performing th…

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## [Optimized Python is as good as Julia](https://discourse.julialang.org/t/optimized-python-is-as-good-as-julia/104432)

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**Author:** [@mrkorch](https://discourse.julialang.org/u/mrkorch)\
**Replies:** 28\
**Last updated:** [June 2, 2025, 11:55am UTC](https://discourse.julialang.org/t/optimized-python-is-as-good-as-julia/104432 "2025-06-02T11:55:55Z")

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Comparison of Python / Julia benchmarks for a maths problem. I am considering switching to Julia, but would like to know if it is worth it for such tasks. Here is the Python code I used: import random import numpy as n…

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## [UndefVarError: ODESystem not defined when running DynamicalSystems.jl example](https://discourse.julialang.org/t/undefvarerror-odesystem-not-defined-when-running-dynamicalsystems-jl-example/129514)

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**Author:** [@cristian\_marin](https://discourse.julialang.org/u/cristian_marin)\
**Replies:** 3\
**Last updated:** [June 2, 2025, 11:43am UTC](https://discourse.julialang.org/t/undefvarerror-odesystem-not-defined-when-running-dynamicalsystems-jl-example/129514 "2025-06-02T11:43:21Z")

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UndefVarError: ODESystem not defined in Main Stacktrace: \[1\] top-level scope @ C:\\Users\\marin.julia\\packages\\ModelingToolkit\\DSTHC\\src\\systems\\abstractsystem.jl:2191 I’m trying to run a example from DynamicalSystems.…

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## [FItting Price Impact Models](https://discourse.julialang.org/t/fitting-price-impact-models/129547)

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**Author:** [@dm13450](https://discourse.julialang.org/u/dm13450)\
**Replies:** 1\
**Last updated:** [June 2, 2025, 11:33am UTC](https://discourse.julialang.org/t/fitting-price-impact-models/129547 "2025-06-02T11:33:45Z")

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Another blog post in Julia, this time looking at price impact models and the practicalities in fitting them. Fitting Price Impact Models | Dean Markwick

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## [KernelAbstractions.get\_backend(::BitArray) causes StackOverflowError](https://discourse.julialang.org/t/kernelabstractions-get-backend-bitarray-causes-stackoverflowerror/129551)

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**Author:** [@0samuraiE](https://discourse.julialang.org/u/0samuraiE)\
**Replies:** 1\
**Last updated:** [June 2, 2025, 9:23am UTC](https://discourse.julialang.org/t/kernelabstractions-get-backend-bitarray-causes-stackoverflowerror/129551 "2025-06-02T09:23:57Z")

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Hi all, I’m using KernelAbstractions.jl, and encountered a StackOverflowError when trying to call get\_backend on a BitArray (e.g., from a comparison like .\<): using KernelAbstractions x = rand(10) msk = x .\< 0.5 get\_ba…

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## [Bodeplot Sampling Resolution Adjustable?](https://discourse.julialang.org/t/bodeplot-sampling-resolution-adjustable/129544)

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**Author:** [@theo.bruelhart](https://discourse.julialang.org/u/theo.bruelhart)\
**Replies:** 7\
**Last updated:** [June 2, 2025, 9:18am UTC](https://discourse.julialang.org/t/bodeplot-sampling-resolution-adjustable/129544 "2025-06-02T09:18:11Z")

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Hi How can I adjust the sampling resolution of Bode plots? I am comparing the frequency responses of different filters, and some plots appear undersampled (see the blue curve in the illustration below).

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## [Using ControlSystemsBase, DSP: Exemplary Use Case of Electronic Filter Design](https://discourse.julialang.org/t/using-controlsystemsbase-dsp-exemplary-use-case-of-electronic-filter-design/127349)

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**Author:** [@theo.bruelhart](https://discourse.julialang.org/u/theo.bruelhart)\
**Replies:** 2\
**Last updated:** [June 1, 2025, 10:38pm UTC](https://discourse.julialang.org/t/using-controlsystemsbase-dsp-exemplary-use-case-of-electronic-filter-design/127349 "2025-06-01T22:38:07Z")

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Hi Today, I have been experimenting with basic functions from the ControlSystemsBase.jl and DSP.jl packages. Some guidance for the below mentioned approach would be appreciated. Given the simple transfer function T=Vou…

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## [Calling C Code with Automatic Differentiation in Julia](https://discourse.julialang.org/t/calling-c-code-with-automatic-differentiation-in-julia/129503)

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**Author:** [@fgittins](https://discourse.julialang.org/u/fgittins)\
**Replies:** 6\
**Last updated:** [June 2, 2025, 7:39am UTC](https://discourse.julialang.org/t/calling-c-code-with-automatic-differentiation-in-julia/129503 "2025-06-02T07:39:48Z")

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Hi all, I’m reaching out to see if anyone in the Julia community has experience or advice on calling C code from Julia in a way that still supports automatic differentiation (AD). My motivation I’m working on a project…

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## [Problems with @manipulate](https://discourse.julialang.org/t/problems-with-manipulate/129524)

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**Author:** [@angeloaliano1](https://discourse.julialang.org/u/angeloaliano1)\
**Replies:** 3\
**Last updated:** [June 2, 2025, 5:21am UTC](https://discourse.julialang.org/t/problems-with-manipulate/129524 "2025-06-02T05:21:19Z")

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Hello, I would like to see some levels curves of my function, like this, using @manipulate macro inside Julia (version 1.11.0-beta2) installed on my machine (not in a notebook). The code is the following: using Plots,…

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## [Convert a nonlinear model defined by JuMP's legacy version to latest version](https://discourse.julialang.org/t/convert-a-nonlinear-model-defined-by-jumps-legacy-version-to-latest-version/129542)

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**Author:** [@zhu266](https://discourse.julialang.org/u/zhu266)\
**Replies:** 7\
**Last updated:** [June 2, 2025, 3:44am UTC](https://discourse.julialang.org/t/convert-a-nonlinear-model-defined-by-jumps-legacy-version-to-latest-version/129542 "2025-06-02T03:44:00Z")

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Hi everyone, I am fetching models from MINLPLib.jl, and I guess they use “Nonlinear Modeling (Legacy)” to define nonlinear constraints/objectives. I am curious if there is any way to transform a nonlinear model defined b…

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## [Keep it simple stupid vs PPLs like Turing](https://discourse.julialang.org/t/keep-it-simple-stupid-vs-ppls-like-turing/129452)

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**Author:** [@nomadbl](https://discourse.julialang.org/u/nomadbl)\
**Replies:** 5\
**Last updated:** [June 2, 2025, 1:13am UTC](https://discourse.julialang.org/t/keep-it-simple-stupid-vs-ppls-like-turing/129452 "2025-06-02T01:13:52Z")

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Hello everyone. I come from a general Machine Learning and Neural Networks background and learned about probabilistic programming and Bayesian Inference in the last year. Naturally I wanted to see what was available in …

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## [Porting cuda example to rocm amdgpu](https://discourse.julialang.org/t/porting-cuda-example-to-rocm-amdgpu/129545)

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**Author:** [@jcbritobr](https://discourse.julialang.org/u/jcbritobr)\
**Replies:** 0\
**Last updated:** [June 2, 2025, 12:35am UTC](https://discourse.julialang.org/t/porting-cuda-example-to-rocm-amdgpu/129545 "2025-06-02T00:35:00Z")

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Hello, good evening. May someone help to show me how to start porting this example to use amdgpu.jl?

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## [Astrophotography in Julia?](https://discourse.julialang.org/t/astrophotography-in-julia/89491)

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**Author:** [@johnmyleswhite](https://discourse.julialang.org/u/johnmyleswhite)\
**Replies:** 1\
**Last updated:** [June 1, 2025, 10:43pm UTC](https://discourse.julialang.org/t/astrophotography-in-julia/89491 "2025-06-01T22:43:25Z")

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I’ve recently gotten interested in astrophotography. I’ve seen and used some of the AstroJulia packages, which are great, but I’m wondering if there’s anyone else working on things that especially common for photographer…

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## [Memory Comprehensions](https://discourse.julialang.org/t/memory-comprehensions/129033)

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**Author:** [@PatrickHaecker](https://discourse.julialang.org/u/PatrickHaecker)\
**Replies:** 7\
**Last updated:** [May 25, 2025, 10:51am UTC](https://discourse.julialang.org/t/memory-comprehensions/129033 "2025-05-25T10:51:04Z")

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Is there a Memory comprehension in Julia, which I missed so far? We have Array comprehensions, but when you don’t need the multiple dimensions and resizing properties of an Array and a Memory is enough, it would be nice…

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## [Allocations when moving loop into a function](https://discourse.julialang.org/t/allocations-when-moving-loop-into-a-function/129534)

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**Author:** [@omicron8](https://discourse.julialang.org/u/omicron8)\
**Replies:** 3\
**Last updated:** [June 1, 2025, 10:04pm UTC](https://discourse.julialang.org/t/allocations-when-moving-loop-into-a-function/129534 "2025-06-01T22:04:08Z")

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Why does the first variant (function foo) allocate a large amount of memory while the second variant (function bar) does not? The difference is whether the loop is inside or outside the function. Is there a way to have t…

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## [Package for Graphical Models and Graphical Lasso](https://discourse.julialang.org/t/package-for-graphical-models-and-graphical-lasso/41107)

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**Author:** [@mleprovost](https://discourse.julialang.org/u/mleprovost)\
**Replies:** 2\
**Last updated:** [June 1, 2025, 8:11pm UTC](https://discourse.julialang.org/t/package-for-graphical-models-and-graphical-lasso/41107 "2025-06-01T20:11:13Z")

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Hello, Is there a Julia package for probabilitistic graphical models, in particular an implementation of the Graphical Lasso to identify sparse precision matrix (https://statweb.stanford.edu/~jhf/ftp/glasso-bio.pdf)

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## [Where to implement new matrix multiplication algorithms?](https://discourse.julialang.org/t/where-to-implement-new-matrix-multiplication-algorithms/129525)

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**Author:** [@PepeRoConde](https://discourse.julialang.org/u/PepeRoConde)\
**Replies:** 3\
**Last updated:** [June 1, 2025, 4:27pm UTC](https://discourse.julialang.org/t/where-to-implement-new-matrix-multiplication-algorithms/129525 "2025-06-01T16:27:03Z")

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like the ones proposed here h\_ttps://arxiv.org/pdf/2505.05896 h\_ttps://github.com/mkauers/matrix-multiplication thanks!

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## [Surprising Error message](https://discourse.julialang.org/t/surprising-error-message/129483)

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**Author:** [@SergeantMike67](https://discourse.julialang.org/u/SergeantMike67)\
**Replies:** 2\
**Last updated:** [June 1, 2025, 4:06pm UTC](https://discourse.julialang.org/t/surprising-error-message/129483 "2025-06-01T16:06:59Z")

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I have a script I wrote that calculates Temporal Reproductive Isolation which worked 6 months ago. It needs some tweaking but now when I run it I get: ERROR: ArgumentError: invalid GenericMemory size: too large for sys…

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## [About JuMP's speed of building an expression](https://discourse.julialang.org/t/about-jumps-speed-of-building-an-expression/129018)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 20\
**Last updated:** [June 1, 2025, 2:17pm UTC](https://discourse.julialang.org/t/about-jumps-speed-of-building-an-expression/129018 "2025-06-01T14:17:58Z")

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I find that it seems to be not that fast for JuMP to build a “large” expression I wonder: is this speed normal? Why? Can (or how can) it be improved somehow? import LinearAlgebra.dot as dot using JuMP, BenchmarkTools N…

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## [How can I find out why a the package ImageCore is in my project](https://discourse.julialang.org/t/how-can-i-find-out-why-a-the-package-imagecore-is-in-my-project/129521)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 4\
**Last updated:** [June 1, 2025, 1:00pm UTC](https://discourse.julialang.org/t/how-can-i-find-out-why-a-the-package-imagecore-is-in-my-project/129521 "2025-06-01T13:00:56Z")

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How can I find out why I have a curtain package installed (indirect dependency)? I get these warnings: WARNING: using deprecated binding Rotations.UnitQuaternion in KiteModels. , use QuatRotation instead. WARNING: Kite…

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## [REPL.TerminalMenus.MultiSelectMenu: aborted vs. nothing selected](https://discourse.julialang.org/t/repl-terminalmenus-multiselectmenu-aborted-vs-nothing-selected/129505)

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**Author:** [@Eben60](https://discourse.julialang.org/u/Eben60)\
**Replies:** 1\
**Last updated:** [June 1, 2025, 12:09pm UTC](https://discourse.julialang.org/t/repl-terminalmenus-multiselectmenu-aborted-vs-nothing-selected/129505 "2025-06-01T12:09:52Z")

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In both cases it returnes empty array, though it’s obviously not (always) the same? Is it possible to change the behavior? After reading the Julia docs on TerminalMenus I’m no wiser than before. :frowning: AbstractMenu…

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## [Out of memory error in \`viz\` of 3D \`RectilinearGrid\` from Meshes.jl](https://discourse.julialang.org/t/out-of-memory-error-in-viz-of-3d-rectilineargrid-from-meshes-jl/128643)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 33\
**Last updated:** [May 31, 2025, 7:30pm UTC](https://discourse.julialang.org/t/out-of-memory-error-in-viz-of-3d-rectilineargrid-from-meshes-jl/128643 "2025-05-31T19:30:03Z")

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I want to plot a grid using Meshes.jl and GLMakie.jl. I am reading the HDF5 data file output of Athena++ astrophysical code using HDF5.jl library. In Athena++ mesh grid is divided into smaller parts called Blocks to use…

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