# Latest

**URL:** https://discourse.julialang.org/latest.md?page=21

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

**Page:** 22

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## [High-Performance, Lane-Based Segmented Sieve in Julia](https://discourse.julialang.org/t/high-performance-lane-based-segmented-sieve-in-julia/137854)

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**Author:** [@Claugo](https://discourse.julialang.org/u/Claugo)\
**Replies:** 6\
**Last updated:** [July 1, 2026, 10:27am UTC](https://discourse.julialang.org/t/high-performance-lane-based-segmented-sieve-in-julia/137854 "2026-07-01T10:27:47Z")

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Hi everyone I wanted to share a program I’ve been working on within my GC60 project, which focuses on high-magnitude prime searching (beyond the 64-bit barrier). The goal wasn’t just to write a fast sieve, but to explor…

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## [Why doesn't the solver reach the optimal solution?](https://discourse.julialang.org/t/why-doesnt-the-solver-reach-the-optimal-solution/137852)

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**Author:** [@HenriDeh](https://discourse.julialang.org/u/HenriDeh)\
**Replies:** 7\
**Last updated:** [July 1, 2026, 3:14am UTC](https://discourse.julialang.org/t/why-doesnt-the-solver-reach-the-optimal-solution/137852 "2026-07-01T03:14:12Z")

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Hello, I am working on improving a formulation of an optimization problem with JuMP and have encountered an issue that has been blocking me for several days. After extensive debugging and manual verification, I am reason…

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## [Color theme for plots within VS Code?](https://discourse.julialang.org/t/color-theme-for-plots-within-vs-code/73021)

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**Author:** [@zdenek\_hurak](https://discourse.julialang.org/u/zdenek_hurak)\
**Replies:** 2\
**Last updated:** [June 30, 2026, 6:55pm UTC](https://discourse.julialang.org/t/color-theme-for-plots-within-vs-code/73021 "2026-06-30T18:55:35Z")

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Using the the PlotThemes.jl package, I can set the color theme for generated plots using theme() command/function (of course, following the using PlotThemes). Within Atom/Juno editor I used to use theme(:juno) and the ge…

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## [PV-loop area](https://discourse.julialang.org/t/pv-loop-area/137839)

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**Author:** [@violabini](https://discourse.julialang.org/u/violabini)\
**Replies:** 6\
**Last updated:** [June 30, 2026, 11:52am UTC](https://discourse.julialang.org/t/pv-loop-area/137839 "2026-06-30T11:52:05Z")

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I am developing a 0D model for the cardiac circulation and I would like to compute the workload as the internal area of the Pressure Volume -loop. Do you know any method that allow me to do this even if my PV loop is ext…

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## [Solving the Helium Eigenvalue Problem—where to start?](https://discourse.julialang.org/t/solving-the-helium-eigenvalue-problem-where-to-start/137783)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 8\
**Last updated:** [June 29, 2026, 7:18pm UTC](https://discourse.julialang.org/t/solving-the-helium-eigenvalue-problem-where-to-start/137783 "2026-06-29T19:18:53Z")

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I have inherited Fortran code (the same one in this paper) that solves the time-independent Schrodinger equation for the ground state of the helium atom. This is generally a very difficult problem because the Schrodinger…

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## [Positions in data driven modeling at WIAS](https://discourse.julialang.org/t/positions-in-data-driven-modeling-at-wias/137666)

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**Author:** [@j-fu](https://discourse.julialang.org/u/j-fu)\
**Replies:** 3\
**Last updated:** [June 29, 2026, 4:06pm UTC](https://discourse.julialang.org/t/positions-in-data-driven-modeling-at-wias/137666 "2026-06-29T16:06:29Z")

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The Weierstrass Institute for Applied Analysis and Stochastics (WIAS) in Berlin offers positions in the newly founded research group “Data-Driven Mathematical Modeling”. All of them require programming experience in Jul…

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## [Boundary Condition Error in MethodOfLines](https://discourse.julialang.org/t/boundary-condition-error-in-methodoflines/137819)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 2\
**Last updated:** [June 29, 2026, 12:53pm UTC](https://discourse.julialang.org/t/boundary-condition-error-in-methodoflines/137819 "2026-06-29T12:53:59Z")

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I’m trying to use MethodOfLines to solve the time-independent Schrodinger equation for hydrogen, as a prelude to more complicated systems. The equation is as follows: \\nabla^2 \\psi(\\vec{r}) - \\frac{1}{r}\\psi(\\vec{r}) =…

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## [Confusion about nested for loop output](https://discourse.julialang.org/t/confusion-about-nested-for-loop-output/137835)

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**Author:** [@Henri\_Laurie](https://discourse.julialang.org/u/Henri_Laurie)\
**Replies:** 3\
**Last updated:** [June 29, 2026, 7:51am UTC](https://discourse.julialang.org/t/confusion-about-nested-for-loop-output/137835 "2026-06-29T07:51:05Z")

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I realise this is old and tired. I disagreed with the scope changes of 1.5, but I am not trying to open that discussion. I am just genuinely puzzled by the following in the REPL: for outer = 1:2 println…

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## [AD using Enzyme in ODE problem with DataInterpolations](https://discourse.julialang.org/t/ad-using-enzyme-in-ode-problem-with-datainterpolations/137771)

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**Author:** [@imre](https://discourse.julialang.org/u/imre)\
**Replies:** 3\
**Last updated:** [June 29, 2026, 7:47am UTC](https://discourse.julialang.org/t/ad-using-enzyme-in-ode-problem-with-datainterpolations/137771 "2026-06-29T07:47:07Z")

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Hello, I have an ODE problem which uses DataInterpolations.jl to obtain input values for the system at specific timepoints in order to compute dx. I want to use Enzyme.jl to compute the gradients with respect to paramete…

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## [\[ANN\] OptParse.jl – a composable, type-stable CLI parser](https://discourse.julialang.org/t/ann-optparse-jl-a-composable-type-stable-cli-parser/136580)

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**Author:** [@cshen](https://discourse.julialang.org/u/cshen)\
**Replies:** 15\
**Last updated:** [June 28, 2026, 10:48pm UTC](https://discourse.julialang.org/t/ann-optparse-jl-a-composable-type-stable-cli-parser/136580 "2026-06-28T22:48:10Z")

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\[ANN\] OptParse.jl – a composable, type-stable CLI parser Hi all, I’ve been working on OptParse.jl, a command-line argument parser for Julia built around three main ideas: type stability: the main goal was to make a CL…

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## [Making a Universal Differential Equation Faster](https://discourse.julialang.org/t/making-a-universal-differential-equation-faster/137829)

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**Author:** [@Ashima\_Kalathingal](https://discourse.julialang.org/u/Ashima_Kalathingal)\
**Replies:** 1\
**Last updated:** [June 28, 2026, 1:57am UTC](https://discourse.julialang.org/t/making-a-universal-differential-equation-faster/137829 "2026-06-28T01:57:32Z")

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I have a two-state ODE, one of which is embedded in a neural network, making it a UDE. I am using 9 datasets for training, resulting in 9 distinct ODEs. prob1 = ODEProblem(UDE\_model1!,\[SOC0\_1, T∞1\],(time1\[1\],time1\[end\])…

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## [How does ForwardDiff.jl and FiniteDiff.jl handle edge-hitting cases?](https://discourse.julialang.org/t/how-does-forwarddiff-jl-and-finitediff-jl-handle-edge-hitting-cases/137828)

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**Author:** [@Xu\_Shan](https://discourse.julialang.org/u/Xu_Shan)\
**Replies:** 3\
**Last updated:** [June 27, 2026, 11:18pm UTC](https://discourse.julialang.org/t/how-does-forwarddiff-jl-and-finitediff-jl-handle-edge-hitting-cases/137828 "2026-06-27T23:18:02Z")

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Hi guys, I am using ForwardDiff.jl to calculate the parameter uncertainty in my model (see below about the more detailed information…). I am wondering, how does ForwardDiff.jl and FiniteDiff.jl handle the edge-hitting p…

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## [Publish interactive Pluto notebooks with glassnotebook.io](https://discourse.julialang.org/t/publish-interactive-pluto-notebooks-with-glassnotebook-io/102801)

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**Author:** [@Dale\_James\_Black](https://discourse.julialang.org/u/Dale_James_Black)\
**Replies:** 23\
**Last updated:** [June 27, 2026, 7:20pm UTC](https://discourse.julialang.org/t/publish-interactive-pluto-notebooks-with-glassnotebook-io/102801 "2026-06-27T19:20:50Z")

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Sign up for Glass Notebook https://glassnotebook.io/ Previous Post A couple of months ago, we put out this post to gauge the interest in a service like Glass Notebook. Today, after dedicated efforts, particularly fro…

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## [Saving figures in makie](https://discourse.julialang.org/t/saving-figures-in-makie/137814)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 10\
**Last updated:** [June 27, 2026, 6:12pm UTC](https://discourse.julialang.org/t/saving-figures-in-makie/137814 "2026-06-27T18:12:05Z")

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Is there a recommended way to save a figure in makie, akin to using savefig in Matlab as a “.fig” file?

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## [\[ANN\] MakieTextRepel.jl and TextMeasure.jl](https://discourse.julialang.org/t/ann-makietextrepel-jl-and-textmeasure-jl/137810)

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**Author:** [@jowch](https://discourse.julialang.org/u/jowch)\
**Replies:** 7\
**Last updated:** [June 27, 2026, 4:32pm UTC](https://discourse.julialang.org/t/ann-makietextrepel-jl-and-textmeasure-jl/137810 "2026-06-27T16:32:49Z")

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Hi everyone! I made a pair of packages that provide some helpful utilities when it comes to adding text labels to your Makie plots and for calculating the sizes of and laying out text. MakieTextRepel.jl A ggrepel/adjus…

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## [How to make a heatmap with pgfplotsx?](https://discourse.julialang.org/t/how-to-make-a-heatmap-with-pgfplotsx/75128)

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**Author:** [@ccmejia](https://discourse.julialang.org/u/ccmejia)\
**Replies:** 4\
**Last updated:** [June 27, 2026, 2:08pm UTC](https://discourse.julialang.org/t/how-to-make-a-heatmap-with-pgfplotsx/75128 "2026-06-27T14:08:07Z")

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Hi there! Which is the straightforward pgfplotsx way to make heatmap figure? For Plots is so easy: V = rand(20, 20) heatmap(V) Thanks in advanced!

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## [Hiring a Senior Software Developer for OPeNDAP](https://discourse.julialang.org/t/hiring-a-senior-software-developer-for-opendap/137820)

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**Author:** [@ArikaV](https://discourse.julialang.org/u/ArikaV)\
**Replies:** 0\
**Last updated:** [June 26, 2026, 11:08pm UTC](https://discourse.julialang.org/t/hiring-a-senior-software-developer-for-opendap/137820 "2026-06-26T23:08:24Z")

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Hi All - Here is a new job posting for a Senior Software Developer role at OPeNDAP. Please share widely amongst your networks and with your colleagues! While C++ is emphasized in the job description due to the NASA contr…

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## [Hexaly solver with JuMP](https://discourse.julialang.org/t/hexaly-solver-with-jump/124827)

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**Author:** [@baprata](https://discourse.julialang.org/u/baprata)\
**Replies:** 8\
**Last updated:** [June 26, 2026, 7:45pm UTC](https://discourse.julialang.org/t/hexaly-solver-with-jump/124827 "2026-06-26T19:45:57Z")

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Dear Colleagues, Is it feasible to call the Hexaly solver (https://www.hexaly.com/) within the JuMP library? If so, could someone provide some source code with an example? Best regards, Bruno

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## [Package registration via Juliahub not working](https://discourse.julialang.org/t/package-registration-via-juliahub-not-working/137324)

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**Author:** [@Eben60](https://discourse.julialang.org/u/Eben60)\
**Replies:** 12\
**Last updated:** [June 26, 2026, 2:22pm UTC](https://discourse.julialang.org/t/package-registration-via-juliahub-not-working/137324 "2026-06-26T14:22:35Z")

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When clicking onto “Register package” on Juliahub packages page, “Error fetching registries” is shown in the popup window.

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## [\[ANN\] CortexPlot.jl: cortical interactive visualization of EEG inverse solution data](https://discourse.julialang.org/t/ann-cortexplot-jl-cortical-interactive-visualization-of-eeg-inverse-solution-data/137816)

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**Author:** [@Marco-Congedo](https://discourse.julialang.org/u/Marco-Congedo)\
**Replies:** 0\
**Last updated:** [June 26, 2026, 9:51am UTC](https://discourse.julialang.org/t/ann-cortexplot-jl-cortical-interactive-visualization-of-eeg-inverse-solution-data/137816 "2026-06-26T09:51:07Z")

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An interactive plot for 2D and 3D cortical functional data (for example, EEG inverse solutions) :rocket: Repo

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## [Base.retry: what is it for?](https://discourse.julialang.org/t/base-retry-what-is-it-for/137815)

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**Author:** [@mzaffalon](https://discourse.julialang.org/u/mzaffalon)\
**Replies:** 1\
**Last updated:** [June 26, 2026, 9:17am UTC](https://discourse.julialang.org/t/base-retry-what-is-it-for/137815 "2026-06-26T09:17:55Z")

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I understand the documentation for Base.retry. It seems useful but it does not seem to be used in Julia Base and in the standard library. Is there a specific reason?

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## [Question about SDDP.jl](https://discourse.julialang.org/t/question-about-sddp-jl/137741)

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**Author:** [@david-hri](https://discourse.julialang.org/u/david-hri)\
**Replies:** 2\
**Last updated:** [June 26, 2026, 8:15am UTC](https://discourse.julialang.org/t/question-about-sddp-jl/137741 "2026-06-26T08:15:57Z")

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Hello, I am new to SDDP.jl, so my question may be naive. I currently have a working SDDP model in which the generation profits are computed using a fixed hydraulic head effect (so the efficiency does not depend on the…

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## [Maximum\_a\_posteriori not honoring abstol and reltol? Turing.jl](https://discourse.julialang.org/t/maximum-a-posteriori-not-honoring-abstol-and-reltol-turing-jl/133402)

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**Author:** [@dlakelan](https://discourse.julialang.org/u/dlakelan)\
**Replies:** 7\
**Last updated:** [June 26, 2026, 6:45am UTC](https://discourse.julialang.org/t/maximum-a-posteriori-not-honoring-abstol-and-reltol-turing-jl/133402 "2026-06-26T06:45:38Z")

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So, my student has a problem where he’s just been letting maximum\_a\_priori run for as long as it needs… which is taking like 2000+ seconds… I suggested to try abstol or reltol to make sure it wasn’t spending all its time…

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## [How to write a type to a file?](https://discourse.julialang.org/t/how-to-write-a-type-to-a-file/137798)

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**Author:** [@phma](https://discourse.julialang.org/u/phma)\
**Replies:** 8\
**Last updated:** [June 26, 2026, 4:45am UTC](https://discourse.julialang.org/t/how-to-write-a-type-to-a-file/137798 "2026-06-26T04:45:37Z")

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I’m writing a program to compute the halftone function, and I need to write a struct to a file because it takes a long time to compute. It consists of an OffsetVector of any real floating-point type. I’ve figured out h…

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## [Announcement frequency on Discourse over time](https://discourse.julialang.org/t/announcement-frequency-on-discourse-over-time/137772)

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**Author:** [@jules](https://discourse.julialang.org/u/jules)\
**Replies:** 25\
**Last updated:** [June 26, 2026, 4:33am UTC](https://discourse.julialang.org/t/announcement-frequency-on-discourse-over-time/137772 "2026-06-26T04:33:03Z")

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I was interested in whether agentic coding had a noticeable effect on announcements already, at least I felt that a bunch of stuff was being introduced. I had claude extract posts with ANN in their title (could be other …

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## [Static HTML Exports for Makie Proof of Concept](https://discourse.julialang.org/t/static-html-exports-for-makie-proof-of-concept/137597)

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**Author:** [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Replies:** 6\
**Last updated:** [June 25, 2026, 6:46pm UTC](https://discourse.julialang.org/t/static-html-exports-for-makie-proof-of-concept/137597 "2026-06-25T18:46:03Z")

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@bjarthur and I were exploring the state of static export of some dynamic Makie plots that vary in time. With the help of some AI agents (Google Antigravity CLI with Gemini Flash 3.5) we eventually found a path. I’ve cre…

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## [Do you use Julia's extensive Unicode support?](https://discourse.julialang.org/t/do-you-use-julias-extensive-unicode-support/137702)

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**Author:** [@li210](https://discourse.julialang.org/u/li210)\
**Replies:** 36\
**Last updated:** [June 25, 2026, 5:42pm UTC](https://discourse.julialang.org/t/do-you-use-julias-extensive-unicode-support/137702 "2026-06-25T17:42:04Z")

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Julia puts emphasis on the possible use of non-ASCII symbols in code. Most of supported operators are Unicode characters, some well known mathematical symbols (albeit practically unseen in programming), some are quite ob…

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## [\[ANN\] UnitTypes v3.0.0](https://discourse.julialang.org/t/ann-unittypes-v3-0-0/137806)

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**Author:** [@bcon](https://discourse.julialang.org/u/bcon)\
**Replies:** 0\
**Last updated:** [June 25, 2026, 5:17pm UTC](https://discourse.julialang.org/t/ann-unittypes-v3-0-0/137806 "2026-06-25T17:17:05Z")

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Version 3.0 brings the major addition of a Catchall type for operations that result in undefined units; explicit types are still preferred and will be chosen when available. Exponentiation works on UnitTypes UnitType r…

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## [Auto-differentiation of Numba LLVM IR using Enzyme.jl: linear algebra and opaque external functions](https://discourse.julialang.org/t/auto-differentiation-of-numba-llvm-ir-using-enzyme-jl-linear-algebra-and-opaque-external-functions/137799)

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**Author:** [@ymardoukhi](https://discourse.julialang.org/u/ymardoukhi)\
**Replies:** 0\
**Last updated:** [June 25, 2026, 12:43pm UTC](https://discourse.julialang.org/t/auto-differentiation-of-numba-llvm-ir-using-enzyme-jl-linear-algebra-and-opaque-external-functions/137799 "2026-06-25T12:43:56Z")

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This is related to the thread Get Numba LLVM IR differentiated in Julia using Enzyme.jl: differentiating Python functions decorated as Numba CFunc functions. I am sorry that this thread is quite long, but I tried to be a…

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## [How to link PolarAxis in Makie.jl](https://discourse.julialang.org/t/how-to-link-polaraxis-in-makie-jl/137787)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 3\
**Last updated:** [June 25, 2026, 11:30am UTC](https://discourse.julialang.org/t/how-to-link-polaraxis-in-makie-jl/137787 "2026-06-25T11:30:21Z")

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I know we can use Makie.linkaxes(fig.content...) when the content is a collection of Makie.Axis. If I try the same command with Makie.PolarAxis, I get an error. Is it currently not supported?

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