# New to Julia

**URL:** https://discourse.julialang.org/c/first-steps/8.md?page=1

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

**Page:** 2

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## [Can't install DifferentialEquations](https://discourse.julialang.org/t/cant-install-differentialequations/138037)

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**Author:** [@Dozeze](https://discourse.julialang.org/u/Dozeze)\
**Replies:** 10\
**Last updated:** [July 9, 2026, 11:48pm UTC](https://discourse.julialang.org/t/cant-install-differentialequations/138037 "2026-07-09T23:48:34Z")

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Hello! I am new to Julia and want to learn coding with SciML.Followed the tutorial but got the following error: julia\> Pkg.add("DifferentialEquations") Updating registry at \`~/.julia/registries/General.toml\` Res…

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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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## [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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## [Julia-snail in Emacs and multithreading](https://discourse.julialang.org/t/julia-snail-in-emacs-and-multithreading/137761)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 1\
**Last updated:** [June 23, 2026, 2:12pm UTC](https://discourse.julialang.org/t/julia-snail-in-emacs-and-multithreading/137761 "2026-06-23T14:12:33Z")

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How to set up julia-snail so that it launches julia as -t auto? Thanks!

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## [Julia security advisories](https://discourse.julialang.org/t/julia-security-advisories/65163)

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**Author:** [@nsslh](https://discourse.julialang.org/u/nsslh)\
**Replies:** 24\
**Last updated:** [June 23, 2026, 2:04pm UTC](https://discourse.julialang.org/t/julia-security-advisories/65163 "2026-06-23T14:04:08Z")

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Hi folks, How should I subscribe for Julia security advisories? At the moment, I’m watching for updates to the Julia image on Docker Hub. I need to do better, both in terms of latency and detail. Thanks, Sheldon.

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## [Fieldnames for an instance of a structure](https://discourse.julialang.org/t/fieldnames-for-an-instance-of-a-structure/137701)

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**Author:** [@Boris](https://discourse.julialang.org/u/Boris)\
**Replies:** 6\
**Last updated:** [June 22, 2026, 11:42am UTC](https://discourse.julialang.org/t/fieldnames-for-an-instance-of-a-structure/137701 "2026-06-22T11:42:30Z")

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Hi, been a while since I have asked a dumb question in New to Julia so here we go. Is there a way to define the function fieldnamesor similar to give me the field names for an instance of a structure? I would like to se…

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## [Cannot precompile LanguageServer in julia1.10.6 on win11](https://discourse.julialang.org/t/cannot-precompile-languageserver-in-julia1-10-6-on-win11/137723)

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**Author:** [@York](https://discourse.julialang.org/u/York)\
**Replies:** 1\
**Last updated:** [June 21, 2026, 4:28am UTC](https://discourse.julialang.org/t/cannot-precompile-languageserver-in-julia1-10-6-on-win11/137723 "2026-06-21T04:28:47Z")

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I cannot precompile my julia 1.10.6 LanuageServer in my new win11. Could you tell me what the problem is? I tried reinstalling Julia, but that didn’t solve it. Run in julia REPL using Pkg Pkg.precompile() Precompiling …

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## [Plotting in Pluto with GLMakie](https://discourse.julialang.org/t/plotting-in-pluto-with-glmakie/137706)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 3\
**Last updated:** [June 20, 2026, 9:16am UTC](https://discourse.julialang.org/t/plotting-in-pluto-with-glmakie/137706 "2026-06-20T09:16:36Z")

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I have a function that creates a Makie plot. I want it to display that plot by default, but to also return other information, let’s say fig and ax, so it can be called as fig, ax = myplot(x). I’m using show == true && di…

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## [\`get()\` returns default value instead of value matching to valid key when default value is an \`error()\`](https://discourse.julialang.org/t/get-returns-default-value-instead-of-value-matching-to-valid-key-when-default-value-is-an-error/137670)

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**Author:** [@jlawrie](https://discourse.julialang.org/u/jlawrie)\
**Replies:** 10\
**Last updated:** [June 19, 2026, 12:26pm UTC](https://discourse.julialang.org/t/get-returns-default-value-instead-of-value-matching-to-valid-key-when-default-value-is-an-error/137670 "2026-06-19T12:26:09Z")

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Hello everyone! Looking at the MWE below: It appears error/throw are run before get is finished, causing get to be interrupted and the default value to be returned, rather than the value which matches the valid key as …

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## [Julia LoadError on Windows: Application Control blocks libintl-8.dll](https://discourse.julialang.org/t/julia-loaderror-on-windows-application-control-blocks-libintl-8-dll/137669)

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**Author:** [@Labubu](https://discourse.julialang.org/u/Labubu)\
**Replies:** 0\
**Last updated:** [June 17, 2026, 2:06pm UTC](https://discourse.julialang.org/t/julia-loaderror-on-windows-application-control-blocks-libintl-8-dll/137669 "2026-06-17T14:06:19Z")

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Hi, I am new to Julia. I have been getting this error every once in a while and I am not quite sure how to solve it. I am running Julia on Windows through VS Code. When I run my script, Windows Security blocks a DLL fro…

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## [Are there any other options besides CairoMakie to save figures?](https://discourse.julialang.org/t/are-there-any-other-options-besides-cairomakie-to-save-figures/137659)

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**Author:** [@ferrada](https://discourse.julialang.org/u/ferrada)\
**Replies:** 3\
**Last updated:** [June 17, 2026, 5:29am UTC](https://discourse.julialang.org/t/are-there-any-other-options-besides-cairomakie-to-save-figures/137659 "2026-06-17T05:29:34Z")

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Hello, I am pretty new to Julia. I started using it because of its computational speed, which seems close to Fortran, the language we use in our atmospheric models. I translated a relatively simple workflow that proces…

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## [Is there a built-in function that converts Val{n} to n?](https://discourse.julialang.org/t/is-there-a-built-in-function-that-converts-val-n-to-n/137665)

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**Author:** [@HMegh](https://discourse.julialang.org/u/HMegh)\
**Replies:** 1\
**Last updated:** [June 17, 2026, 1:50am UTC](https://discourse.julialang.org/t/is-there-a-built-in-function-that-converts-val-n-to-n/137665 "2026-06-17T01:50:39Z")

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I am wondering if there is a built-in function that converts Val{n} to n? I typically need to convert Val’s to integers to name my simulation results properly. Usually, I add this function to my scripts: value(::Val{n}…

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## [MATLAB.jl not supporting cwt()?](https://discourse.julialang.org/t/matlab-jl-not-supporting-cwt/137581)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 3\
**Last updated:** [June 12, 2026, 11:52am UTC](https://discourse.julialang.org/t/matlab-jl-not-supporting-cwt/137581 "2026-06-12T11:52:14Z")

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Hi, I am getting no output for this: using MATLAB mat"cwt($x)" Whereas for instance this works fine: mat"fft($x)" Any clues?

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## [Structure and performance questions from a Fortran programmer: functions, global variables, array allocations, input files, and structs](https://discourse.julialang.org/t/structure-and-performance-questions-from-a-fortran-programmer-functions-global-variables-array-allocations-input-files-and-structs/137409)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 35\
**Last updated:** [June 10, 2026, 1:46pm UTC](https://discourse.julialang.org/t/structure-and-performance-questions-from-a-fortran-programmer-functions-global-variables-array-allocations-input-files-and-structs/137409 "2026-06-10T13:46:24Z")

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I’m a physicist used to using Fortran90 for number crunching and Python for plotting and glue code. I’m learning Julia because of its ease of use, promised efficiency, and excellent math support. That said, there’s some …

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## [\`ArgumentError: Package not found in current path\` in Quarto in VSCode](https://discourse.julialang.org/t/argumenterror-package-not-found-in-current-path-in-quarto-in-vscode/105949)

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**Author:** [@alicepiller](https://discourse.julialang.org/u/alicepiller)\
**Replies:** 2\
**Last updated:** [June 5, 2026, 3:25pm UTC](https://discourse.julialang.org/t/argumenterror-package-not-found-in-current-path-in-quarto-in-vscode/105949 "2026-06-05T15:25:44Z")

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I have created a module with various functions that I’m using for a data analysis project. I want to write up a report using Quarto, but it won’t let me load in the module. It gives the error: ArgumentError: Package not …

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## [Dataframe data manipulation](https://discourse.julialang.org/t/dataframe-data-manipulation/136950)

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**Author:** [@SergeantMike67](https://discourse.julialang.org/u/SergeantMike67)\
**Replies:** 7\
**Last updated:** [June 4, 2026, 3:48pm UTC](https://discourse.julialang.org/t/dataframe-data-manipulation/136950 "2026-06-04T15:48:45Z")

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I have a data frame that is formatted like the example below. Row │ Pairwise p\_adj boo Factor IntBoo │ String Float64 Bool String …

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## [Julia-snail and persistence across emacs sessions](https://discourse.julialang.org/t/julia-snail-and-persistence-across-emacs-sessions/137439)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 0\
**Last updated:** [June 3, 2026, 6:30pm UTC](https://discourse.julialang.org/t/julia-snail-and-persistence-across-emacs-sessions/137439 "2026-06-03T18:30:46Z")

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What’s the best/current way to keep julia always alive in my computer regardless of whether I have restarted emacs? I use julia-snail. Thanks!

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## [Does Julia have some kind of NIAP certification or 3rd party government assessment?](https://discourse.julialang.org/t/does-julia-have-some-kind-of-niap-certification-or-3rd-party-government-assessment/137287)

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**Author:** [@Bad\_Goose](https://discourse.julialang.org/u/Bad_Goose)\
**Replies:** 9\
**Last updated:** [May 30, 2026, 10:30pm UTC](https://discourse.julialang.org/t/does-julia-have-some-kind-of-niap-certification-or-3rd-party-government-assessment/137287 "2026-05-30T22:30:03Z")

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Does this language have some kind of assessment for working in a classified environment? I am trying to determine the eligeability and I have not been able to find anything as of yet. I see memory safe languages are reco…

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## [Spike-and-Slab Implementation using Turing.jl?](https://discourse.julialang.org/t/spike-and-slab-implementation-using-turing-jl/132816)

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**Author:** [@Debartha\_Paul](https://discourse.julialang.org/u/Debartha_Paul)\
**Replies:** 3\
**Last updated:** [May 29, 2026, 9:47am UTC](https://discourse.julialang.org/t/spike-and-slab-implementation-using-turing-jl/132816 "2026-05-29T09:47:17Z")

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So I was looking for an implementation of spike-and-slab prior using the Turing.jl package. Say I have a model as follows: y\_{ig} \\sim N(\\theta\_g, \\sigma^2) where g = 1, \\cdots, G and i = 1, \\cdots, n\_g independently A…

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## [Github action fails for documentation](https://discourse.julialang.org/t/github-action-fails-for-documentation/137313)

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**Author:** [@Boris](https://discourse.julialang.org/u/Boris)\
**Replies:** 5\
**Last updated:** [May 29, 2026, 8:41am UTC](https://discourse.julialang.org/t/github-action-fails-for-documentation/137313 "2026-05-29T08:41:02Z")

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Hi. I have a package on github and a CI worklfow for the documentation. I haven’t done any commits in a while and last time everything was working. Today the documentation build on github fails with a somewhat werid erro…

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## [Filtering Array Rows By Matching Element Value](https://discourse.julialang.org/t/filtering-array-rows-by-matching-element-value/137320)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 7\
**Last updated:** [May 28, 2026, 7:05pm UTC](https://discourse.julialang.org/t/filtering-array-rows-by-matching-element-value/137320 "2026-05-28T19:05:25Z")

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I’m a Julia newbie working with some inherited Fortran 90 code for research purposes. One of the things the Fortran code does is write a list of parameters to file for future use, eg: 0 0 0 1 1 0 1 1 2 0 Say the column…

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## [Column-wise calculations in arrays are slower](https://discourse.julialang.org/t/column-wise-calculations-in-arrays-are-slower/107814)

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**Author:** [@vsoler](https://discourse.julialang.org/u/vsoler)\
**Replies:** 16\
**Last updated:** [May 28, 2026, 2:32pm UTC](https://discourse.julialang.org/t/column-wise-calculations-in-arrays-are-slower/107814 "2026-05-28T14:32:01Z")

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I just read the excellent article on improving calculation performance in loops on the Julia blog fast-numeric. In the article we can read … Julia arrays are stored in column-major order, which means that the rows of …

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## [Running from command line Windows 10](https://discourse.julialang.org/t/running-from-command-line-windows-10/137247)

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**Author:** [@jsampson45](https://discourse.julialang.org/u/jsampson45)\
**Replies:** 11\
**Last updated:** [May 26, 2026, 6:18pm UTC](https://discourse.julialang.org/t/running-from-command-line-windows-10/137247 "2026-05-26T18:18:16Z")

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Can Julia be set up to run from Windows 10 command line? Docs say it runs from command line but the system does not find the file. AFAICS there are juliaup.exe, julialauncher.exe, and two copies of julia.exe on my system…

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## [Tsit5() and DP5() stability](https://discourse.julialang.org/t/tsit5-and-dp5-stability/137137)

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**Author:** [@ligeston](https://discourse.julialang.org/u/ligeston)\
**Replies:** 13\
**Last updated:** [May 19, 2026, 2:32pm UTC](https://discourse.julialang.org/t/tsit5-and-dp5-stability/137137 "2026-05-19T14:32:02Z")

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Hi guys, I am wrapping up a script to solve the TOV equation, similar to the TOVsolver\_Julia, and I used ‘CommonSolve’ and ‘DifferentialEquations’ packages. In the solver, unlike the case in TOVsolver\_Julia, I used cal…

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## [Modelling a network using PowerSystem and PowerSimulationDynamique](https://discourse.julialang.org/t/modelling-a-network-using-powersystem-and-powersimulationdynamique/137158)

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**Author:** [@Curtis96](https://discourse.julialang.org/u/Curtis96)\
**Replies:** 0\
**Last updated:** [May 18, 2026, 7:53am UTC](https://discourse.julialang.org/t/modelling-a-network-using-powersystem-and-powersimulationdynamique/137158 "2026-05-18T07:53:45Z")

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Hello everyone, I’m currently working on modelling a network based on GFM and GFL in Julia using PowerSystem.jl and PowerSimulationDynamique. I have written my own code for the GFL – essentially a custom GFL – but I am h…

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## [Scatter and line segments in Makie](https://discourse.julialang.org/t/scatter-and-line-segments-in-makie/137032)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 2\
**Last updated:** [May 8, 2026, 11:01am UTC](https://discourse.julialang.org/t/scatter-and-line-segments-in-makie/137032 "2026-05-08T11:01:07Z")

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I’m connecting markers with lines like this: p = meshscatter!(ax,X\[framenum,:\],Y\[framenum,:\],Z\[framenum,:\],markersize=msize,color=mcolor,colormap=mcolormap,clip\_planes=Plane3f\[\]) conn = \[(p\[1\]\[\]\[m.conn\[i,1\]\],p\[1\]\[\]\[m.co…

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## [Wavelets, sample rate, and replicating Matlab's default call](https://discourse.julialang.org/t/wavelets-sample-rate-and-replicating-matlabs-default-call/136875)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 9\
**Last updated:** [April 25, 2026, 8:02pm UTC](https://discourse.julialang.org/t/wavelets-sample-rate-and-replicating-matlabs-default-call/136875 "2026-04-25T20:02:15Z")

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Hi, I’m trying to get the same output as with a default cwt(x,fs) Matlab function call, where x is a signal and fs its sample rate. Could anyone help me? Here’s what I have done so far, but I don’t know how to include s…

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## [Julia analog to R's poly function, orthogonal polynomials by QR decomposition](https://discourse.julialang.org/t/julia-analog-to-rs-poly-function-orthogonal-polynomials-by-qr-decomposition/128640)

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**Author:** [@Daniel\_Johansson](https://discourse.julialang.org/u/Daniel_Johansson)\
**Replies:** 24\
**Last updated:** [April 22, 2026, 3:57pm UTC](https://discourse.julialang.org/t/julia-analog-to-rs-poly-function-orthogonal-polynomials-by-qr-decomposition/128640 "2026-04-22T15:57:18Z")

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Hey guys! Im trying to replicate some existing R code in julia for a proyect, but such R code depends on the stats base poly function which, given a collection of points, it computes orthogonal polynomials evaluated at …

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## [Ecosystem Bundle Download](https://discourse.julialang.org/t/ecosystem-bundle-download/136783)

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**Author:** [@leofossilis](https://discourse.julialang.org/u/leofossilis)\
**Replies:** 1\
**Last updated:** [April 20, 2026, 3:27am UTC](https://discourse.julialang.org/t/ecosystem-bundle-download/136783 "2026-04-20T03:27:46Z")

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Hey new to julia, proficient in python and R; Want to know if there is a method to download entire ecosystems like JuliaStats or JuliaGraph using single command?

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## [In Julia, I accidentally typed "\<tab\> \<tab\>". What a nice surprise!](https://discourse.julialang.org/t/in-julia-i-accidentally-typed-tab-tab-what-a-nice-surprise/136762)

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**Author:** [@Tigerbyte](https://discourse.julialang.org/u/Tigerbyte)\
**Replies:** 1\
**Last updated:** [April 19, 2026, 4:42am UTC](https://discourse.julialang.org/t/in-julia-i-accidentally-typed-tab-tab-what-a-nice-surprise/136762 "2026-04-19T04:42:02Z")

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see topic as shown at the top.

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