# Latest

**URL:** https://discourse.julialang.org/latest.md?page=62

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

**Page:** 63

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## [GMT.jl : Coloring lakes, keeping oceans bathymetry](https://discourse.julialang.org/t/gmt-jl-coloring-lakes-keeping-oceans-bathymetry/135163)

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**Author:** [@Balinus](https://discourse.julialang.org/u/Balinus)\
**Replies:** 6\
**Last updated:** [January 22, 2026, 2:06pm UTC](https://discourse.julialang.org/t/gmt-jl-coloring-lakes-keeping-oceans-bathymetry/135163 "2026-01-22T14:06:22Z")

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Hello! I’m trying to plot some points over a map. I would like to keep the default topography/bathymetry visuals, but the lakes are “green”, being over 0m at sea level (my guess). Here’s my current code. I tried to use t…

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## [Simple \`redirect\_stdout\` example](https://discourse.julialang.org/t/simple-redirect-stdout-example/135204)

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**Author:** [@mattsignorelli](https://discourse.julialang.org/u/mattsignorelli)\
**Replies:** 5\
**Last updated:** [January 22, 2026, 2:02pm UTC](https://discourse.julialang.org/t/simple-redirect-stdout-example/135204 "2026-01-22T14:02:45Z")

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I am struggling to get any example with redirect\_stdout to work. There isn’t any documentation on it. E.g. julia\> f, io = mktemp(); julia\> fout = open(f, "w+"); julia\> redirect\_stdout(fout) do println("Hello!")…

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## [Julia is one of the most token-efficient programming languages](https://discourse.julialang.org/t/julia-is-one-of-the-most-token-efficient-programming-languages/134996)

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**Author:** [@xiaoxi](https://discourse.julialang.org/u/xiaoxi)\
**Replies:** 8\
**Last updated:** [January 22, 2026, 12:34pm UTC](https://discourse.julialang.org/t/julia-is-one-of-the-most-token-efficient-programming-languages/134996 "2026-01-22T12:34:09Z")

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Among the most popular programming languages, Julia is one of the most token-efficient programming languages​.

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## [Franklin.jl with Academic template blog markdown rendering & title problem](https://discourse.julialang.org/t/franklin-jl-with-academic-template-blog-markdown-rendering-title-problem/135202)

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**Author:** [@shrdlu](https://discourse.julialang.org/u/shrdlu)\
**Replies:** 0\
**Last updated:** [January 22, 2026, 11:48am UTC](https://discourse.julialang.org/t/franklin-jl-with-academic-template-blog-markdown-rendering-title-problem/135202 "2026-01-22T11:48:09Z")

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I’m testing out a local static page generated by Franklin.jl using the academic template (Your Name) and am running into a number of issues. First one is title extraction for blog posts - SSG process can detect and link…

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## [Convergence of SDE solvers](https://discourse.julialang.org/t/convergence-of-sde-solvers/135179)

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**Author:** [@diffeqslvr](https://discourse.julialang.org/u/diffeqslvr)\
**Replies:** 6\
**Last updated:** [January 22, 2026, 11:22am UTC](https://discourse.julialang.org/t/convergence-of-sde-solvers/135179 "2026-01-22T11:22:52Z")

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I am wondering how to make sure that an SDE solver has converged on a trajectory level. In other words, I want to make sure that I have chosen abstol and reltol small enough. What I would do in the deterministic case is…

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## [Solving an SDE with a Continuous Callback](https://discourse.julialang.org/t/solving-an-sde-with-a-continuous-callback/135180)

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**Author:** [@diffeqslvr](https://discourse.julialang.org/u/diffeqslvr)\
**Replies:** 5\
**Last updated:** [January 22, 2026, 8:51am UTC](https://discourse.julialang.org/t/solving-an-sde-with-a-continuous-callback/135180 "2026-01-22T08:51:49Z")

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I am solving a stochastic differential equation with a ContinuousCallback. Every time the continuous callback is activated, I modify my state vector discontinuously. All the randomness comes from a phase, which follows …

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## [\`@infiltry\` usage](https://discourse.julialang.org/t/infiltry-usage/135198)

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**Author:** [@Alec\_Loudenback](https://discourse.julialang.org/u/Alec_Loudenback)\
**Replies:** 2\
**Last updated:** [January 22, 2026, 8:21am UTC](https://discourse.julialang.org/t/infiltry-usage/135198 "2026-01-22T08:21:35Z")

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I’m exploring Infiltrator.jl and I am not clear on the use case or purpose of @infiltry. I thought that it would help me debug by catching the state of the code when the exception occurred, but this does not seem to be t…

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## [A Short Guide for the Aspiring GSoC Participant!](https://discourse.julialang.org/t/a-short-guide-for-the-aspiring-gsoc-participant/135197)

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**Author:** [@TheCedarPrince](https://discourse.julialang.org/u/TheCedarPrince)\
**Replies:** 0\
**Last updated:** [January 22, 2026, 2:03am UTC](https://discourse.julialang.org/t/a-short-guide-for-the-aspiring-gsoc-participant/135197 "2026-01-22T02:03:20Z")

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Hey there future GSoC-er! Your friendly Julia Language GSoC co-admin, @TheCedarPrince, here! It is that fun time of year again where I see tons of aspiring GSoC-ers asking questions about how to get started within Julia…

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## [General-relativistic coordinates transformation support](https://discourse.julialang.org/t/general-relativistic-coordinates-transformation-support/135196)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 0\
**Last updated:** [January 22, 2026, 1:08am UTC](https://discourse.julialang.org/t/general-relativistic-coordinates-transformation-support/135196 "2026-01-22T01:08:43Z")

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I am looking for package that supports general-relativistic coordinates transformation to Cartesian etc. I would like to transform the following coordinates to Cartesian and vice versa. What will be the code if i have to…

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## [What's the fastest way to fill an array with random bits without using private Random.jl internals?](https://discourse.julialang.org/t/whats-the-fastest-way-to-fill-an-array-with-random-bits-without-using-private-random-jl-internals/135089)

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**Author:** [@npbarnes](https://discourse.julialang.org/u/npbarnes)\
**Replies:** 16\
**Last updated:** [January 21, 2026, 6:59pm UTC](https://discourse.julialang.org/t/whats-the-fastest-way-to-fill-an-array-with-random-bits-without-using-private-random-jl-internals/135089 "2026-01-21T18:59:25Z")

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Suppose I have an array of type e.g. Array{Float64} and I want to fill it with random bits as fast as possible. Note that that’s different from filling it with random floats between 0 and 1. A straight forward way to do …

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## [Symbolic.jl: testing for equality of expressions (with no unknown variables)](https://discourse.julialang.org/t/symbolic-jl-testing-for-equality-of-expressions-with-no-unknown-variables/135188)

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**Author:** [@Grass](https://discourse.julialang.org/u/Grass)\
**Replies:** 1\
**Last updated:** [January 21, 2026, 5:42pm UTC](https://discourse.julialang.org/t/symbolic-jl-testing-for-equality-of-expressions-with-no-unknown-variables/135188 "2026-01-21T17:42:29Z")

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The purpose of this script is to show that the bijection f (represented by the matrix bijection below) I constructed, from the dihedral group D\_6 to the symmetric group S\_3 on 3 letters, is an isomorphism. I tried to ex…

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## [How to retain toggle-visibility by clicking on legend after emptying axis?](https://discourse.julialang.org/t/how-to-retain-toggle-visibility-by-clicking-on-legend-after-emptying-axis/135175)

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**Author:** [@RoyW](https://discourse.julialang.org/u/RoyW)\
**Replies:** 2\
**Last updated:** [January 21, 2026, 5:02pm UTC](https://discourse.julialang.org/t/how-to-retain-toggle-visibility-by-clicking-on-legend-after-emptying-axis/135175 "2026-01-21T17:02:12Z")

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The following code loads a different pair of time-series into the figure whenever the slider is moved. The code below generates three pairs, so the slider has 3 possible values. When the figure is first created right af…

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## [\[ANN\] Glyphy.jl](https://discourse.julialang.org/t/ann-glyphy-jl/121953)

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**Author:** [@cormullion](https://discourse.julialang.org/u/cormullion)\
**Replies:** 6\
**Last updated:** [January 21, 2026, 4:08pm UTC](https://discourse.julialang.org/t/ann-glyphy-jl/121953 "2026-01-21T16:08:56Z")

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This package looks up Unicode glyph names, it might be useful to some. I updated Glyphy.jl to 1.5, so it now includes the (silly) additions in Unicode 16.

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## [MTK -- \`instream\` problem](https://discourse.julialang.org/t/mtk-instream-problem/135171)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 1\
**Last updated:** [January 21, 2026, 3:08pm UTC](https://discourse.julialang.org/t/mtk-instream-problem/135171 "2026-01-21T15:08:25Z")

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I’m trying to understand ModelingToolkit (MTK) connectors, components, and now Stream variables in connector. As an exercise for myself, I am looking at 2 substance, ideal solution liquid tank systems: I consider 3 …

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## [Makie.jl - Subplots + hover information](https://discourse.julialang.org/t/makie-jl-subplots-hover-information/133066)

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**Author:** [@Episki](https://discourse.julialang.org/u/Episki)\
**Replies:** 2\
**Last updated:** [January 21, 2026, 11:40am UTC](https://discourse.julialang.org/t/makie-jl-subplots-hover-information/133066 "2026-01-21T11:40:18Z")

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Hi all. I have a general question regarding Makie.jl, subplots and hover information. I would like to recreate a plot with some subplots in which the hover information of ALL the data-series is shown. There would be 2 w…

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## [\[ANN\] SeisKit.jl - Fast IO operations with SEG-Y files and other utilities](https://discourse.julialang.org/t/ann-seiskit-jl-fast-io-operations-with-seg-y-files-and-other-utilities/134120)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 7\
**Last updated:** [January 21, 2026, 11:14am UTC](https://discourse.julialang.org/t/ann-seiskit-jl-fast-io-operations-with-seg-y-files-and-other-utilities/134120 "2026-01-21T11:14:41Z")

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SeisKit.jl supports all revisions of the SEG-Y standard, but is mostly tested with post-stack seismic data. Compared to previous attempts (listed in the README), this package provides convenience functions to access SEG-…

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## [Sometimes cannot reclaim memory by manual GC.gc()](https://discourse.julialang.org/t/sometimes-cannot-reclaim-memory-by-manual-gc-gc/135158)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 9\
**Last updated:** [January 21, 2026, 10:09am UTC](https://discourse.julialang.org/t/sometimes-cannot-reclaim-memory-by-manual-gc-gc/135158 "2026-01-21T10:09:24Z")

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Edit: Please see the #7 post directly if you’re interested. Thanks. The idea is: I at first create a Vector v = Vector{Matrix{Float64}}(undef, 100); Then I need to fill it with some concrete objects (here are matric…

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## [How To Create a 2D Array of Arrays?](https://discourse.julialang.org/t/how-to-create-a-2d-array-of-arrays/135178)

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**Author:** [@Grass](https://discourse.julialang.org/u/Grass)\
**Replies:** 5\
**Last updated:** [January 21, 2026, 9:50am UTC](https://discourse.julialang.org/t/how-to-create-a-2d-array-of-arrays/135178 "2026-01-21T09:50:52Z")

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Is it possible to create a 2D array of (2D) arrays in Julia? If so, how can I do it? I scoured the internet but I did not manage to find out whether this is possible or not. I only managed to find information on creatin…

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## [Idiomatic evaluate for scalar, allocate and broadcast for array?](https://discourse.julialang.org/t/idiomatic-evaluate-for-scalar-allocate-and-broadcast-for-array/135147)

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**Author:** [@bremez](https://discourse.julialang.org/u/bremez)\
**Replies:** 7\
**Last updated:** [January 21, 2026, 7:01am UTC](https://discourse.julialang.org/t/idiomatic-evaluate-for-scalar-allocate-and-broadcast-for-array/135147 "2026-01-21T07:01:58Z")

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In several cases I’ve come across the following pattern: function f(x; kwargs...) #intense pre-computation that depend on kwargs but not x result = 0.0 \* x; # one way to preallocate for e.g. x::Vector, but not for scala…

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## [External model inputs with time delay using DDEproblem](https://discourse.julialang.org/t/external-model-inputs-with-time-delay-using-ddeproblem/135059)

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**Author:** [@amaliebm](https://discourse.julialang.org/u/amaliebm)\
**Replies:** 1\
**Last updated:** [January 21, 2026, 5:04am UTC](https://discourse.julialang.org/t/external-model-inputs-with-time-delay-using-ddeproblem/135059 "2026-01-21T05:04:34Z")

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How do you add time delays to the external model inputs using ModelingToolkit and DDEProblem? In the example below, adding a time delay to the input Q, gives the error “KeyError: key Q not found” using ModelingToolkit,…

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## [Spiking Neural Model](https://discourse.julialang.org/t/spiking-neural-model/135029)

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**Author:** [@tbzcn](https://discourse.julialang.org/u/tbzcn)\
**Replies:** 1\
**Last updated:** [January 21, 2026, 5:01am UTC](https://discourse.julialang.org/t/spiking-neural-model/135029 "2026-01-21T05:01:49Z")

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Hi, I am new to Julia and my aim is to create a network of spiking neurons. I use simple leaky integrate and fire (LIF) model for now with ODEProblem solver. Whenever the neuron (u) reaches a threshold value, it should …

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## [Emacs julia-mode doesn't know packages?](https://discourse.julialang.org/t/emacs-julia-mode-doesnt-know-packages/135176)

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**Author:** [@ryofurue](https://discourse.julialang.org/u/ryofurue)\
**Replies:** 0\
**Last updated:** [January 21, 2026, 4:38am UTC](https://discourse.julialang.org/t/emacs-julia-mode-doesnt-know-packages/135176 "2026-01-21T04:38:20Z")

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The julia-mode of emacs very often flags package names as “Missing Reference”. A simple using StrFormat triggers the warning. I may be hallucinating, but I seem to remember that that wasn’t the case not so long ago . …

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## [Solving system of spatial Ordinary Differential Equations](https://discourse.julialang.org/t/solving-system-of-spatial-ordinary-differential-equations/135007)

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**Author:** [@federicoangioni](https://discourse.julialang.org/u/federicoangioni)\
**Replies:** 1\
**Last updated:** [January 21, 2026, 4:26am UTC](https://discourse.julialang.org/t/solving-system-of-spatial-ordinary-differential-equations/135007 "2026-01-21T04:26:33Z")

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Hello all, I am Federico, and an undergraduate student approaching Julia for the first time as a part of my studies in computational science. I am currently struggling with solving a system of coupled Ordinary Different…

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## [Problems trying to compile with JuliaC.jl: "Parameters not found"](https://discourse.julialang.org/t/problems-trying-to-compile-with-juliac-jl-parameters-not-found/135168)

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**Author:** [@JJMerelo](https://discourse.julialang.org/u/JJMerelo)\
**Replies:** 0\
**Last updated:** [January 20, 2026, 7:33pm UTC](https://discourse.julialang.org/t/problems-trying-to-compile-with-juliac-jl-parameters-not-found/135168 "2026-01-20T19:33:31Z")

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I’m trying t compile a script using JuliaC.jl and julia version 1.12.3, and I’m getting this error: ◓ Compiling... Activating project at \`/home/jmerelo/Code/julia/BraveNewAlgorithm.jl\` ◓ Compiling...ArgumentError: Pack…

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## [How to change repl keybindings](https://discourse.julialang.org/t/how-to-change-repl-keybindings/135167)

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**Author:** [@jar1](https://discourse.julialang.org/u/jar1)\
**Replies:** 1\
**Last updated:** [January 20, 2026, 7:22pm UTC](https://discourse.julialang.org/t/how-to-change-repl-keybindings/135167 "2026-01-20T19:22:38Z")

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REPL: allow editing current input in editor (via Meta-e) by rfourquet · Pull Request #33759 · JuliaLang/julia · GitHub uses Meta+e for edit command line in editor. I want to use Ctrl+xCtrl+e for that because that’s what…

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## [Installing on Windows](https://discourse.julialang.org/t/installing-on-windows/135157)

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**Author:** [@phma](https://discourse.julialang.org/u/phma)\
**Replies:** 2\
**Last updated:** [January 20, 2026, 4:20am UTC](https://discourse.julialang.org/t/installing-on-windows/135157 "2026-01-20T04:20:26Z")

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I visited another surveyor this afternoon and he said he was thinking of using AI to automate tasks such as looking up the adjoiners of a lot. I told him that made no sense and suggested using shell scripts and Julia scr…

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## [Simple DAE does not solve](https://discourse.julialang.org/t/simple-dae-does-not-solve/135148)

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**Author:** [@ohmsweetohm1](https://discourse.julialang.org/u/ohmsweetohm1)\
**Replies:** 4\
**Last updated:** [January 19, 2026, 11:50pm UTC](https://discourse.julialang.org/t/simple-dae-does-not-solve/135148 "2026-01-19T23:50:15Z")

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I tried the very most basic forced DAE I could think of and implemented an RC-circuit: using Sundials using OrdinaryDiffEq using Test u(t) = t \< 0.5 ? 0.0 : 1.0 p = (R=1.0, C=1.0) righthandside = (out, dx, x, p, t) -\> …

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## [Issues customizing \`JULIAUP\_DEPOT\_PATH\` for VSCode](https://discourse.julialang.org/t/issues-customizing-juliaup-depot-path-for-vscode/135152)

<div class="topic-metadata">

**Author:** [@jlchan](https://discourse.julialang.org/u/jlchan)\
**Replies:** 2\
**Last updated:** [January 19, 2026, 11:37pm UTC](https://discourse.julialang.org/t/issues-customizing-juliaup-depot-path-for-vscode/135152 "2026-01-19T23:37:53Z")

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I’m having some trouble customizing JULIA\_DEPOT\_PATH through juliaup based on the juliaup repo is that Before installing Julia/juliaup, I add export JULIAUP\_DEPOT\_PATH=/workspace/.julia to my ~/.bashrc file. I then in…

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## [How to tell vscode language server to use julia executable path and DEPOT\_PATH?](https://discourse.julialang.org/t/how-to-tell-vscode-language-server-to-use-julia-executable-path-and-depot-path/133498)

<div class="topic-metadata">

**Author:** [@progtw1](https://discourse.julialang.org/u/progtw1)\
**Replies:** 3\
**Last updated:** [January 19, 2026, 11:07pm UTC](https://discourse.julialang.org/t/how-to-tell-vscode-language-server-to-use-julia-executable-path-and-depot-path/133498 "2026-01-19T23:07:35Z")

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I am using a setup on a shared cluster where I work with the vscode remote extension and where Julia is installed using a module system rather than juliaup. In VSCode settings I set both Julia Executable path and Langua…

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## [New Repo for updated Julia translation of "Introduction to Statistical Learning (2nd ed)" (ISLR2) Labs](https://discourse.julialang.org/t/new-repo-for-updated-julia-translation-of-introduction-to-statistical-learning-2nd-ed-islr2-labs/135112)

<div class="topic-metadata">

**Author:** [@compleat](https://discourse.julialang.org/u/compleat)\
**Replies:** 7\
**Last updated:** [January 19, 2026, 10:10pm UTC](https://discourse.julialang.org/t/new-repo-for-updated-julia-translation-of-introduction-to-statistical-learning-2nd-ed-islr2-labs/135112 "2026-01-19T22:10:21Z")

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New Translation of popular statistics course based on “Introduction to Statistical Learning in R”, but Hastie, Tibshirani, et. al. Complete Labs GitHub - compleathorseplayer/ISLR-labs-in-Julia: Julia translations of IS…

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