# Latest

**URL:** https://discourse.julialang.org/latest.md?page=692

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

**Page:** 693

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## [Julia 1.9-rc2 Pluto not plots not working](https://discourse.julialang.org/t/julia-1-9-rc2-pluto-not-plots-not-working/97811)

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**Author:** [@peteole](https://discourse.julialang.org/u/peteole)\
**Replies:** 1\
**Last updated:** [May 22, 2023, 4:35pm UTC](https://discourse.julialang.org/t/julia-1-9-rc2-pluto-not-plots-not-working/97811 "2023-05-22T16:35:59Z")

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Hi, a selecting the Julia 1.9-rc2 kernel in a Pluto notebook on my Apple silicon Mac and plotting (for instance running plot(rand(10)) results in the following error: MethodError: no method matching project\_rel\_path(::…

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## [\[Ann\] Makie v0.19.5 and new blogpost](https://discourse.julialang.org/t/ann-makie-v0-19-5-and-new-blogpost/99235)

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**Author:** [@sdanisch](https://discourse.julialang.org/u/sdanisch)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 4:10pm UTC](https://discourse.julialang.org/t/ann-makie-v0-19-5-and-new-blogpost/99235 "2023-05-22T16:10:42Z")

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Exciting updates from the Makie universe!:tada: Check out the latest blogpost to learn about the Makie@0.19.5 release, exciting developments in the Makie community and what came out off MakieCon! A few teasers (more co…

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## [Can I do linear regression over physical data with Unitful?](https://discourse.julialang.org/t/can-i-do-linear-regression-over-physical-data-with-unitful/99229)

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**Author:** [@bertulli](https://discourse.julialang.org/u/bertulli)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 3:27pm UTC](https://discourse.julialang.org/t/can-i-do-linear-regression-over-physical-data-with-unitful/99229 "2023-05-22T15:27:17Z")

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Hi all! I want to fit a multiple linear model on some data I collected. I decorated my data with units of measure using Unitful.jl, and I use GLM.jl’s lm function to produce the model. However, I can’t make it work. To …

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## [Is CUDA.jl and FFTW threadsafe?](https://discourse.julialang.org/t/is-cuda-jl-and-fftw-threadsafe/99219)

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**Author:** [@jpdoane](https://discourse.julialang.org/u/jpdoane)\
**Replies:** 4\
**Last updated:** [May 22, 2023, 2:44pm UTC](https://discourse.julialang.org/t/is-cuda-jl-and-fftw-threadsafe/99219 "2023-05-22T14:44:21Z")

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I am getting the following error when using CUDA.jl FFTW plans in multiple threads. Is this interface not threadsafe? If not, do I just need a mutex around plan\_fft!(), or might the actual fft be not threadsafe as well? …

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## [Bug during redefinition of \`Base.getproperty\` for abstract type](https://discourse.julialang.org/t/bug-during-redefinition-of-base-getproperty-for-abstract-type/99203)

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**Author:** [@sirion34](https://discourse.julialang.org/u/sirion34)\
**Replies:** 7\
**Last updated:** [May 22, 2023, 2:27pm UTC](https://discourse.julialang.org/t/bug-during-redefinition-of-base-getproperty-for-abstract-type/99203 "2023-05-22T14:27:28Z")

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why does this bug occur? if you run this code, the console will give a lot of “name” and close with an error, but I didn’t even run the function abstract type AbstractNewType end function Base.getproperty(x::Type{A}, …

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## [InvalidIRError: compiling kernel init\_mar!](https://discourse.julialang.org/t/invalidirerror-compiling-kernel-init-mar/99224)

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**Author:** [@jqwenchen](https://discourse.julialang.org/u/jqwenchen)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 2:20pm UTC](https://discourse.julialang.org/t/invalidirerror-compiling-kernel-init-mar/99224 "2023-05-22T14:20:33Z")

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I also try with the latest Julia version, Who know how to solve it. Thanks!

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## [Arrow changes a DataFrame column from type \`Float32\` to \`Float32?\` without missing values?](https://discourse.julialang.org/t/arrow-changes-a-dataframe-column-from-type-float32-to-float32-without-missing-values/99045)

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**Author:** [@phantom](https://discourse.julialang.org/u/phantom)\
**Replies:** 5\
**Last updated:** [May 22, 2023, 2:03pm UTC](https://discourse.julialang.org/t/arrow-changes-a-dataframe-column-from-type-float32-to-float32-without-missing-values/99045 "2023-05-22T14:03:44Z")

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I’m sure I’m overlooking something simple here but is there a reason why Arrow would convert a Float32 column in a Dataframe df to type Float32? when all(x-\>typeof(x) == Float32, df.col) true and any(ismissing.(df.col…

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## [Is it just me getting frequent error messages from Revise.jl?](https://discourse.julialang.org/t/is-it-just-me-getting-frequent-error-messages-from-revise-jl/99210)

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**Author:** [@Euhan](https://discourse.julialang.org/u/Euhan)\
**Replies:** 2\
**Last updated:** [May 22, 2023, 1:52pm UTC](https://discourse.julialang.org/t/is-it-just-me-getting-frequent-error-messages-from-revise-jl/99210 "2023-05-22T13:52:20Z")

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When working with Julia (and using my startup file that has @eval using Revise in it), many operations fail with the error message: ERROR: UndefVarError: re\_section\_capture not defined This seems to come from Revise. I…

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## [SQL-like "trigger" for arrays within a struct](https://discourse.julialang.org/t/sql-like-trigger-for-arrays-within-a-struct/99177)

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**Author:** [@jwright11](https://discourse.julialang.org/u/jwright11)\
**Replies:** 3\
**Last updated:** [May 22, 2023, 1:52pm UTC](https://discourse.julialang.org/t/sql-like-trigger-for-arrays-within-a-struct/99177 "2023-05-22T13:52:17Z")

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Is there such a thing as a SQL-like “trigger” for arrays within a struct in Julia? I have an immutable struct, foo, that stores lots of pieces of information which get consumed by other functions. Two of the elements of…

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## [Why is for loops so slow?](https://discourse.julialang.org/t/why-is-for-loops-so-slow/99199)

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**Author:** [@perebalazs](https://discourse.julialang.org/u/perebalazs)\
**Replies:** 9\
**Last updated:** [May 22, 2023, 1:48pm UTC](https://discourse.julialang.org/t/why-is-for-loops-so-slow/99199 "2023-05-22T13:48:46Z")

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I tried to write a simple code for solving a system of equations using Gauss elimination. The coefficient matrix is symmetric. This code runs more than 16 times slower than the built-in x=A\\b algorithm. I’ve tried almost…

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## [Does the "Int" Type really exist?](https://discourse.julialang.org/t/does-the-int-type-really-exist/99205)

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**Author:** [@fer2tdt](https://discourse.julialang.org/u/fer2tdt)\
**Replies:** 7\
**Last updated:** [May 22, 2023, 12:08pm UTC](https://discourse.julialang.org/t/does-the-int-type-really-exist/99205 "2023-05-22T12:08:24Z")

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Hi, 1.- I’m finding the use of type “Int” and “Type{Int}” in some articles and documents, 2.- also some functions reply “things” when I used “Int” likes argument … but not the same if I use Type{Int} likes argument … …

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## [Normalizing Values and Floating Point Error](https://discourse.julialang.org/t/normalizing-values-and-floating-point-error/99213)

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**Author:** [@ianroddis](https://discourse.julialang.org/u/ianroddis)\
**Replies:** 6\
**Last updated:** [May 22, 2023, 12:04pm UTC](https://discourse.julialang.org/t/normalizing-values-and-floating-point-error/99213 "2023-05-22T12:04:46Z")

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Sorry if this isn’t the right place to post this question, but it was as close as I could think for the intersection of concerns. Most sources I’ve read on data modelling suggest that, when required, values be normalize…

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## [Numeric value substitution into SymPy Symbolic array or matrix](https://discourse.julialang.org/t/numeric-value-substitution-into-sympy-symbolic-array-or-matrix/99204)

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**Author:** [@johannesnauta](https://discourse.julialang.org/u/johannesnauta)\
**Replies:** 5\
**Last updated:** [May 22, 2023, 10:42am UTC](https://discourse.julialang.org/t/numeric-value-substitution-into-sympy-symbolic-array-or-matrix/99204 "2023-05-22T10:42:10Z")

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I am having trouble substituting numerical values into symbolic arrays and matrices. I have read about lambdify, but I still fail to provide numerical values for the arguments in a consistent way. As an example, consid…

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## [How to give proper order in xaxis during boxplot?](https://discourse.julialang.org/t/how-to-give-proper-order-in-xaxis-during-boxplot/99206)

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**Author:** [@Sahil\_Khan](https://discourse.julialang.org/u/Sahil_Khan)\
**Replies:** 4\
**Last updated:** [May 22, 2023, 9:38am UTC](https://discourse.julialang.org/t/how-to-give-proper-order-in-xaxis-during-boxplot/99206 "2023-05-22T09:38:42Z")

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How to arrange it as P9, P10 and P11?

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## [PcoCameras - A julia interface for PCO cameras](https://discourse.julialang.org/t/pcocameras-a-julia-interface-for-pco-cameras/99202)

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**Author:** [@ehgus](https://discourse.julialang.org/u/ehgus)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 8:24am UTC](https://discourse.julialang.org/t/pcocameras-a-julia-interface-for-pco-cameras/99202 "2023-05-22T08:24:25Z")

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Here we announce a julia interface for PCO cameras. This package provides a high-level camera framework using Cameras.jl(@stemann), and it also provide low-level API interfaces. You can test with your PCO cameras by fol…

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## [Inherit.jl](https://discourse.julialang.org/t/inherit-jl/99102)

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**Author:** [@Kirby\_Zhang](https://discourse.julialang.org/u/Kirby_Zhang)\
**Replies:** 16\
**Last updated:** [May 22, 2023, 8:07am UTC](https://discourse.julialang.org/t/inherit-jl/99102 "2023-05-22T08:07:33Z")

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I’m happy to announce the first release of Inherit.jl. The package provides a simple way to inherit fields and interface definitions in Julia. it is currently available in the general registry (\] add Inherit). Example: …

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## [Designing a band pass filter with modeling toolkit](https://discourse.julialang.org/t/designing-a-band-pass-filter-with-modeling-toolkit/99118)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 5\
**Last updated:** [May 22, 2023, 6:51am UTC](https://discourse.julialang.org/t/designing-a-band-pass-filter-with-modeling-toolkit/99118 "2023-05-22T06:51:49Z")

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What is the best way to design a band pass filter in the continues domain using modelling toolkit? Some hints how to do it in Python: Butterworth Bandpass — SciPy Cookbook documentation Update: OK, I can design a filte…

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## [Still not able to render a Quarto file (qmd) using Julia in VSCode. Help?](https://discourse.julialang.org/t/still-not-able-to-render-a-quarto-file-qmd-using-julia-in-vscode-help/98701)

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**Author:** [@Hugo](https://discourse.julialang.org/u/Hugo)\
**Replies:** 5\
**Last updated:** [May 22, 2023, 6:30am UTC](https://discourse.julialang.org/t/still-not-able-to-render-a-quarto-file-qmd-using-julia-in-vscode-help/98701 "2023-05-22T06:30:07Z")

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My questions is basically a follow up to a very similar question you can find here. I have: run Pkg.build("IJulia"), removed and reinstalled IJulia, and then built the package again, removed the Jupyter extension and…

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## [Symbolics- Expression changing behaviour after println()](https://discourse.julialang.org/t/symbolics-expression-changing-behaviour-after-println/99195)

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**Author:** [@Whyborn](https://discourse.julialang.org/u/Whyborn)\
**Replies:** 0\
**Last updated:** [May 22, 2023, 1:56am UTC](https://discourse.julialang.org/t/symbolics-expression-changing-behaviour-after-println/99195 "2023-05-22T01:56:55Z")

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Hi, I have observed some very strange behaviour using Symbolics.jl that I’m trying to understand. The behaviour of expressions in a dictionary, one which I might pass to Symbolics.substitute(), changes after I println() …

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## [Stackoverflow Error in plot of 3D data point](https://discourse.julialang.org/t/stackoverflow-error-in-plot-of-3d-data-point/99093)

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**Author:** [@Movicmatics](https://discourse.julialang.org/u/Movicmatics)\
**Replies:** 8\
**Last updated:** [May 22, 2023, 12:25am UTC](https://discourse.julialang.org/t/stackoverflow-error-in-plot-of-3d-data-point/99093 "2023-05-22T00:25:30Z")

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Hello everyone, I am trying to run my code but I am encountering an error, I would be glad if help can be render. The Error mesage is: ERROR: StackOverflowError: Stacktrace: \[1\] RecipesPipeline.Volume(v::Array{Floa…

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## [Radial basis functions in surrogates.jl?](https://discourse.julialang.org/t/radial-basis-functions-in-surrogates-jl/99144)

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**Author:** [@rkube](https://discourse.julialang.org/u/rkube)\
**Replies:** 4\
**Last updated:** [May 21, 2023, 9:47pm UTC](https://discourse.julialang.org/t/radial-basis-functions-in-surrogates-jl/99144 "2023-05-21T21:47:54Z")

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Hi, I’m trying to understand what RBFs Surrogates.jl is using. For example, the documentation only specifies that it uses RadialBasis . The \[code\] specifies that there is a linearRadial and cubicRadial. What equation is…

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## [Chains vs iterations behavior in Turing sampler (conditional priors)](https://discourse.julialang.org/t/chains-vs-iterations-behavior-in-turing-sampler-conditional-priors/99165)

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**Author:** [@PeX](https://discourse.julialang.org/u/PeX)\
**Replies:** 8\
**Last updated:** [May 21, 2023, 9:02pm UTC](https://discourse.julialang.org/t/chains-vs-iterations-behavior-in-turing-sampler-conditional-priors/99165 "2023-05-21T21:02:51Z")

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I wrote a simple model that looks like this: @model function stam() # Prior distributions op = \[1.0, 2.0, 3.0, 4.0\] α ~ DiscreteUniform(1, length(op)) β ~ truncated(Normal(op\[α\] , 0.1); lower=0.01, upper=10.0)…

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## [Julia syntax](https://discourse.julialang.org/t/julia-syntax/98826)

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**Author:** [@AGoh2019](https://discourse.julialang.org/u/AGoh2019)\
**Replies:** 11\
**Last updated:** [May 21, 2023, 8:55pm UTC](https://discourse.julialang.org/t/julia-syntax/98826 "2023-05-21T20:55:18Z")

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I wonder if the Julia syntax changes between versions. I have been using the online tutorial “Think Julia” but the constructs used in the ebook does not match the Julia 1.9.0 version’s REPL that I am using. Would hope t…

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## [Eigenvalue ordering unexpectedly different in two cases](https://discourse.julialang.org/t/eigenvalue-ordering-unexpectedly-different-in-two-cases/99189)

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**Author:** [@Nikos\_Gianniotis](https://discourse.julialang.org/u/Nikos_Gianniotis)\
**Replies:** 2\
**Last updated:** [May 21, 2023, 8:52pm UTC](https://discourse.julialang.org/t/eigenvalue-ordering-unexpectedly-different-in-two-cases/99189 "2023-05-21T20:52:23Z")

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Hello everyone, I am probably making a subtle mistake or assumption somewhere as I cannot understand why the following two eigendecompositions do not return the eigenvalues in the same order. Could somebody please expla…

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## [How to create ASCII equations](https://discourse.julialang.org/t/how-to-create-ascii-equations/99180)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 4\
**Last updated:** [May 21, 2023, 8:33pm UTC](https://discourse.julialang.org/t/how-to-create-ascii-equations/99180 "2023-05-21T20:33:06Z")

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In the documentation of ModelingToolkit I find a lot of ASCII equations, e.g. k ─────── sT + 1 Is there a way to generate this ascii art automatically? I looked at latexify, but I did not find an option to generate …

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## [MakieCon 2023](https://discourse.julialang.org/t/makiecon-2023/91841)

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**Author:** [@lazarusA](https://discourse.julialang.org/u/lazarusA)\
**Replies:** 16\
**Last updated:** [May 21, 2023, 8:01pm UTC](https://discourse.julialang.org/t/makiecon-2023/91841 "2023-05-21T20:01:24Z")

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MakieCon 2023 We’re happy to announce our first MakieCon! The conference will take place at the Max Planck Institute for Biogeochemistry in Jena, Germany, from April 18-20. If you want to join, please fill out the appl…

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## [Solving unbounded problem by NeuralPDE](https://discourse.julialang.org/t/solving-unbounded-problem-by-neuralpde/99169)

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**Author:** [@Ethan\_Tran](https://discourse.julialang.org/u/Ethan_Tran)\
**Replies:** 6\
**Last updated:** [May 21, 2023, 6:36pm UTC](https://discourse.julialang.org/t/solving-unbounded-problem-by-neuralpde/99169 "2023-05-21T18:36:45Z")

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I would like to solve an unbounded problem in PDE format by NeuralPDE. The domains of the problem is x belong \[0;inf) and y belong real number (R) please help me on how could I implement these domains in Julia and whet…

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## [Help to plot a surface plot with infinite roots?](https://discourse.julialang.org/t/help-to-plot-a-surface-plot-with-infinite-roots/98291)

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**Author:** [@Moslem\_Uddin](https://discourse.julialang.org/u/Moslem_Uddin)\
**Replies:** 10\
**Last updated:** [May 21, 2023, 6:18pm UTC](https://discourse.julialang.org/t/help-to-plot-a-surface-plot-with-infinite-roots/98291 "2023-05-21T18:18:02Z")

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I am trying to generate a surface plot of the following in Julia. As I’m new, I’m struggling where \\alpha\_k are I’m being able to generate a line plot at a fixed time using the following code: using Roots,Plots plot…

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## [Julia supported by LangChain?](https://discourse.julialang.org/t/julia-supported-by-langchain/98509)

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**Author:** [@Alex\_Tantos](https://discourse.julialang.org/u/Alex_Tantos)\
**Replies:** 14\
**Last updated:** [May 21, 2023, 5:27pm UTC](https://discourse.julialang.org/t/julia-supported-by-langchain/98509 "2023-05-21T17:27:21Z")

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Hi there! Is anyone aware of any attempts/plans by LangChain to support julia? Any answer will be greatly appreciated! Best! Alex

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## [Recue Interpolated data from old JLD2](https://discourse.julialang.org/t/recue-interpolated-data-from-old-jld2/99181)

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**Author:** [@marianoarnaiz](https://discourse.julialang.org/u/marianoarnaiz)\
**Replies:** 6\
**Last updated:** [May 21, 2023, 3:50pm UTC](https://discourse.julialang.org/t/recue-interpolated-data-from-old-jld2/99181 "2023-05-21T15:50:01Z")

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Hi everyone, a couple of years ago a created some interpolated functions with Interpolations.jl and saved then to files in JLD2. I used them a lot back in the day, but trying to load them now (new computer, new OS, new J…

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