# Latest

**URL:** https://discourse.julialang.org/latest.md?page=652

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

**Page:** 653

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## [Julia v1.10.0-alpha1 is now available](https://discourse.julialang.org/t/julia-v1-10-0-alpha1-is-now-available/101284)

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**Author:** [@ararslan](https://discourse.julialang.org/u/ararslan)\
**Replies:** 0\
**Last updated:** [July 7, 2023, 12:53am UTC](https://discourse.julialang.org/t/julia-v1-10-0-alpha1-is-now-available/101284 "2023-07-07T00:53:59Z")

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The Julia developers are pleased to announce that Julia v1.10.0 is now in alpha. You can download binaries for the first alpha release, v1.10.0-alpha1, at https://julialang.org/downloads/ in the “upcoming release” sectio…

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## [Report of environment package versions and hardware resources](https://discourse.julialang.org/t/report-of-environment-package-versions-and-hardware-resources/101279)

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**Author:** [@jddorellanao](https://discourse.julialang.org/u/jddorellanao)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 11:12pm UTC](https://discourse.julialang.org/t/report-of-environment-package-versions-and-hardware-resources/101279 "2023-07-06T23:12:43Z")

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I would like to get a report of my environment package versions and hardware resources like Scooby does in Python (image below), but for Julia, is there a package or a way to do that?

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## [Get dof values of nodes](https://discourse.julialang.org/t/get-dof-values-of-nodes/101272)

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**Author:** [@mary](https://discourse.julialang.org/u/mary)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 11:06pm UTC](https://discourse.julialang.org/t/get-dof-values-of-nodes/101272 "2023-07-06T23:06:14Z")

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Hi, I am using Gridap to solve and FE and then use it in optimization. i have non zero dirichlet boundary condition as displacement on a load line. to solve the finite element part i used below function function stepDi…

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## [Assignment into array of arrays by broadcasting](https://discourse.julialang.org/t/assignment-into-array-of-arrays-by-broadcasting/91072)

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**Author:** [@adannenberg](https://discourse.julialang.org/u/adannenberg)\
**Replies:** 12\
**Last updated:** [July 6, 2023, 9:45pm UTC](https://discourse.julialang.org/t/assignment-into-array-of-arrays-by-broadcasting/91072 "2023-07-06T21:45:19Z")

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I want to simulate a process with 3 discrete outcomes. Let’s say they have probabilities .2, .3 and .5 and I want to run nSim = 10 simulations, each of which is a series of nDraw = 5 draws from the discrete distribution…

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## [Plots.jl: Creating stacked subplots with common x-axis and no margins (padding) in between](https://discourse.julialang.org/t/plots-jl-creating-stacked-subplots-with-common-x-axis-and-no-margins-padding-in-between/101233)

<div class="topic-metadata">

**Author:** [@ykh-1992](https://discourse.julialang.org/u/ykh-1992)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 7:25pm UTC](https://discourse.julialang.org/t/plots-jl-creating-stacked-subplots-with-common-x-axis-and-no-margins-padding-in-between/101233 "2023-07-06T19:25:56Z")

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Hello! I would like to know if it is possible to create a plot with stacked subplots sharing a common x-axis. I’m looking to have no margins, gaps, spaces, or paddings in between the subplots. Is it possible to do it …

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## [Rodas4 vs Rodas4P vs Rodas4P2 solvers](https://discourse.julialang.org/t/rodas4-vs-rodas4p-vs-rodas4p2-solvers/101261)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 6\
**Last updated:** [July 6, 2023, 7:59pm UTC](https://discourse.julialang.org/t/rodas4-vs-rodas4p-vs-rodas4p2-solvers/101261 "2023-07-06T19:59:11Z")

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Today I found that the solver Rodas4P2 is working best for my model. For an tolerance of 1e-7 it is 4 times faster than Simulink, operating at a tolerance of 1e-3. But what is the difference between Rodas4, Rodas4P and …

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## [Sysimage creation example with plots does not seem to work](https://discourse.julialang.org/t/sysimage-creation-example-with-plots-does-not-seem-to-work/101269)

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**Author:** [@rdiaz02](https://discourse.julialang.org/u/rdiaz02)\
**Replies:** 2\
**Last updated:** [July 6, 2023, 7:10pm UTC](https://discourse.julialang.org/t/sysimage-creation-example-with-plots-does-not-seem-to-work/101269 "2023-07-06T19:10:44Z")

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The example given in Creating a sysimage for fast plotting with Plots.jl · PackageCompiler does not finish after more than 25 minutes. I am running Julia 1.9.2 under Debian Linux. This is what I have done: Create fil…

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## [Non greedy regex match](https://discourse.julialang.org/t/non-greedy-regex-match/101268)

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**Author:** [@filchristou](https://discourse.julialang.org/u/filchristou)\
**Replies:** 4\
**Last updated:** [July 6, 2023, 5:46pm UTC](https://discourse.julialang.org/t/non-greedy-regex-match/101268 "2023-07-06T17:46:18Z")

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How can I match non-greedily a regex in julia ? A general stackoverflow post mentions .\*? but it doesn’t work. Julia docs point to pcre2 site that mentions (?U) default ungreedy (lazy) but I am not sure how to use it…

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## [Filtering/joining multiple data frames with respect to selected keys](https://discourse.julialang.org/t/filtering-joining-multiple-data-frames-with-respect-to-selected-keys/101108)

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**Author:** [@johnbb](https://discourse.julialang.org/u/johnbb)\
**Replies:** 9\
**Last updated:** [July 6, 2023, 4:52pm UTC](https://discourse.julialang.org/t/filtering-joining-multiple-data-frames-with-respect-to-selected-keys/101108 "2023-07-06T16:52:46Z")

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I have an array/vector of data frames where each data frame has columns site and time and some others with common names. How can I filter the data frames such that each data frame has exactly the same rows for site and t…

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## [JuliaCon 2023 Session Chair Volunteers Signup Link](https://discourse.julialang.org/t/juliacon-2023-session-chair-volunteers-signup-link/101270)

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**Author:** [@Steven\_Kell](https://discourse.julialang.org/u/Steven_Kell)\
**Replies:** 0\
**Last updated:** [July 6, 2023, 4:43pm UTC](https://discourse.julialang.org/t/juliacon-2023-session-chair-volunteers-signup-link/101270 "2023-07-06T16:43:14Z")

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JuliaCon 2023 Session Chair Volunteers Signup Link Dear people of Julia, Many thanks for your interest in taking up the role of a session chair and for making sure that JuliaCon runs smoothly! Please follow the link t…

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## [Is there a way to parallelize portions of code in Flux?](https://discourse.julialang.org/t/is-there-a-way-to-parallelize-portions-of-code-in-flux/101096)

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**Author:** [@josemanuel22](https://discourse.julialang.org/u/josemanuel22)\
**Replies:** 7\
**Last updated:** [July 6, 2023, 4:17pm UTC](https://discourse.julialang.org/t/is-there-a-way-to-parallelize-portions-of-code-in-flux/101096 "2023-07-06T16:17:35Z")

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Hello, I have a code where I want to execute a parallel loop within the code portion responsible for automatic differentiation. This is because the cost function I want to compute relies on certain properties of the esti…

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## [Batch trainning with Lux and multiple optimizers](https://discourse.julialang.org/t/batch-trainning-with-lux-and-multiple-optimizers/100571)

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**Author:** [@James\_Fernandez](https://discourse.julialang.org/u/James_Fernandez)\
**Replies:** 14\
**Last updated:** [July 6, 2023, 3:35pm UTC](https://discourse.julialang.org/t/batch-trainning-with-lux-and-multiple-optimizers/100571 "2023-07-06T15:35:40Z")

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Hello to all, Following the description of batching in Flux in here. I have created a script with Lux: using Lux, Optimization, OptimizationOptimisers, OptimizationOptimJL, OrdinaryDiffEq, SciMLSensitivity, ComponentA…

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## [Training universal differential equations](https://discourse.julialang.org/t/training-universal-differential-equations/100787)

<div class="topic-metadata">

**Author:** [@T\_J](https://discourse.julialang.org/u/T_J)\
**Replies:** 7\
**Last updated:** [July 6, 2023, 3:09pm UTC](https://discourse.julialang.org/t/training-universal-differential-equations/100787 "2023-07-06T15:09:22Z")

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Hello, In a universal differential equation where the ODE + NN is not able to finish the integration routine, Is there a procedure (best practices) to execute in order to train the ODE? If the integration procedure is …

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## [Create iterator for meshgrid of arbitrary dimension](https://discourse.julialang.org/t/create-iterator-for-meshgrid-of-arbitrary-dimension/55820)

<div class="topic-metadata">

**Author:** [@maxkapur](https://discourse.julialang.org/u/maxkapur)\
**Replies:** 2\
**Last updated:** [July 6, 2023, 2:51pm UTC](https://discourse.julialang.org/t/create-iterator-for-meshgrid-of-arbitrary-dimension/55820 "2023-07-06T14:51:40Z")

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I am trying to implement a function along the following lines (with the end of evaluating a function over many points in the probability simplex). function grid(n, density=5) ran = range(0, stop=1, length=density) …

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## [Summer School on Research Software Engineering with Julia in Stuttgart, Germany](https://discourse.julialang.org/t/summer-school-on-research-software-engineering-with-julia-in-stuttgart-germany/101259)

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**Author:** [@ranocha](https://discourse.julialang.org/u/ranocha)\
**Replies:** 0\
**Last updated:** [July 6, 2023, 1:47pm UTC](https://discourse.julialang.org/t/summer-school-on-research-software-engineering-with-julia-in-stuttgart-germany/101259 "2023-07-06T13:47:52Z")

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Hi all! There will be a summer school on Julia in Stuttgart organized by some local folks: You are at the beginning of your PhD and want to start with a solid foundation in Research Software Engineering? Or you simply…

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## [TaylorInterface.jl: highly efficient numerical integration of ODEs with jet transport](https://discourse.julialang.org/t/taylorinterface-jl-highly-efficient-numerical-integration-of-odes-with-jet-transport/101256)

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**Author:** [@Alseidon](https://discourse.julialang.org/u/Alseidon)\
**Replies:** 0\
**Last updated:** [July 6, 2023, 12:54pm UTC](https://discourse.julialang.org/t/taylorinterface-jl-highly-efficient-numerical-integration-of-odes-with-jet-transport/101256 "2023-07-06T12:54:30Z")

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I just made public the repo for my first package, TaylorInterface.jl. This is an interface to taylor, a Linux tool for transforming equations for a vector into a highly efficient C numerical integrator, with arbitrary or…

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## [Error when using a df load from a CSV and nthreads \> 1](https://discourse.julialang.org/t/error-when-using-a-df-load-from-a-csv-and-nthreads-1/101250)

<div class="topic-metadata">

**Author:** [@mariok90](https://discourse.julialang.org/u/mariok90)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 12:28pm UTC](https://discourse.julialang.org/t/error-when-using-a-df-load-from-a-csv-and-nthreads-1/101250 "2023-07-06T12:28:22Z")

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Hi, I encountered an error when I load a CSV file into a DataFrame and use stack. I narrowed it down that it only occurs if I run Julia --threads=auto (Threads.nthreads() \> 1). I was able to reproduce the error in this…

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## [Visualize 3D polygon of brain regions given points representing exterior border](https://discourse.julialang.org/t/visualize-3d-polygon-of-brain-regions-given-points-representing-exterior-border/101247)

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**Author:** [@vandenman](https://discourse.julialang.org/u/vandenman)\
**Replies:** 3\
**Last updated:** [July 6, 2023, 11:25am UTC](https://discourse.julialang.org/t/visualize-3d-polygon-of-brain-regions-given-points-representing-exterior-border/101247 "2023-07-06T11:25:19Z")

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I’m trying to create a 3d plot of some brain regions. However, the data I have is not a mesh but a series of 3d points that indicate the exterior border of the regions. How can I plot this with GLMakie? Below is the cod…

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## [Extracting Documenter.jl examples for precompilation](https://discourse.julialang.org/t/extracting-documenter-jl-examples-for-precompilation/101234)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 2\
**Last updated:** [July 6, 2023, 11:00am UTC](https://discourse.julialang.org/t/extracting-documenter-jl-examples-for-precompilation/101234 "2023-07-06T11:00:49Z")

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Is there any method to go through all @example blocks in the documentation of a package, extract self-contained scripts that were written by the author, and then use these scripts for precompilation of the package? I am…

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## [Create temporary local namespace?](https://discourse.julialang.org/t/create-temporary-local-namespace/101227)

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**Author:** [@hatmatrix](https://discourse.julialang.org/u/hatmatrix)\
**Replies:** 10\
**Last updated:** [July 6, 2023, 9:59am UTC](https://discourse.julialang.org/t/create-temporary-local-namespace/101227 "2023-07-06T09:59:10Z")

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In R you can use the following syntax to access variables within a data frame. df = data.frame(x = 1:10, y = 1) z = with(df, x + y) # =\> \[2, 3, ..., 11\] The with function is very powerful in that it also allows you to …

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## [Fixing some regions of a Variable array in convex.jl](https://discourse.julialang.org/t/fixing-some-regions-of-a-variable-array-in-convex-jl/101246)

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**Author:** [@UgeB](https://discourse.julialang.org/u/UgeB)\
**Replies:** 2\
**Last updated:** [July 6, 2023, 9:11am UTC](https://discourse.julialang.org/t/fixing-some-regions-of-a-variable-array-in-convex-jl/101246 "2023-07-06T09:11:38Z")

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The fix! function in the Convex.jl packages allows to fix the value of a variable to a constant during the optimization. I was wondering how I can get the same result with a multi-dimensional variable for which I want t…

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## [Distributed.@everywhere alters random generator state?](https://discourse.julialang.org/t/distributed-everywhere-alters-random-generator-state/101230)

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**Author:** [@pitsianis](https://discourse.julialang.org/u/pitsianis)\
**Replies:** 2\
**Last updated:** [July 6, 2023, 9:04am UTC](https://discourse.julialang.org/t/distributed-everywhere-alters-random-generator-state/101230 "2023-07-06T09:04:37Z")

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\_ \_ \_ \_(\_)\_ | Documentation: https://docs.julialang.org (\_) | (\_) (\_) | \_ \_ \_| |\_ \_\_ \_ | Type "?" for help, "\]?" for Pkg help. | | | | | | |/ \_\` | | | | |\_| | | | (\_| |…

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## [Parameter discover in odes](https://discourse.julialang.org/t/parameter-discover-in-odes/101243)

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**Author:** [@Marco\_Nesta](https://discourse.julialang.org/u/Marco_Nesta)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 8:55am UTC](https://discourse.julialang.org/t/parameter-discover-in-odes/101243 "2023-07-06T08:55:30Z")

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I’m new to julia. i’m working on a project where the idea is to use pinns or NODEs to approximate the parameters of the ODEs i’m describing. let me explain better, i have my ODEs and i have the measured data. i want to g…

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## [About modifying the .m file in MATLAB](https://discourse.julialang.org/t/about-modifying-the-m-file-in-matlab/101210)

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**Author:** [@lzq-zbc](https://discourse.julialang.org/u/lzq-zbc)\
**Replies:** 5\
**Last updated:** [July 6, 2023, 7:30am UTC](https://discourse.julialang.org/t/about-modifying-the-m-file-in-matlab/101210 "2023-07-06T07:30:43Z")

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Does Julia have a toolkit that enables reading and modifying .m files in MATLAB?

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## [Big PDESystem exceeds maximal parameter space of CUDA kernels](https://discourse.julialang.org/t/big-pdesystem-exceeds-maximal-parameter-space-of-cuda-kernels/101047)

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**Author:** [@drsk](https://discourse.julialang.org/u/drsk)\
**Replies:** 7\
**Last updated:** [July 6, 2023, 6:48am UTC](https://discourse.julialang.org/t/big-pdesystem-exceeds-maximal-parameter-space-of-cuda-kernels/101047 "2023-07-06T06:48:06Z")

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I’m using NeuralPDE.jl to find critical points of a geometric flow equation on the four-torus. This ends up being a fairly big system, with 18 variables in total. I think the size of the system makes the CUDA compiler ge…

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## [HTTP request a Request](https://discourse.julialang.org/t/http-request-a-request/101195)

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**Author:** [@jar1](https://discourse.julialang.org/u/jar1)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 3:31am UTC](https://discourse.julialang.org/t/http-request-a-request/101195 "2023-07-06T03:31:02Z")

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I want to create a Request and then send it in two separate steps. Request() instantiates a request, but how can I send it?

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## [Geometric Programming in Convex.jl](https://discourse.julialang.org/t/geometric-programming-in-convex-jl/101223)

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**Author:** [@corbinklett](https://discourse.julialang.org/u/corbinklett)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 2:12am UTC](https://discourse.julialang.org/t/geometric-programming-in-convex-jl/101223 "2023-07-06T02:12:17Z")

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Has anyone seen a wrapper for geometric programs for Convex.jl, such as that offered by CVXPY? Disciplined Geometric Programming — CVXPY 1.3 documentation

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## [Matrix SDE problem and dimension mismatch](https://discourse.julialang.org/t/matrix-sde-problem-and-dimension-mismatch/101194)

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**Author:** [@simoneb](https://discourse.julialang.org/u/simoneb)\
**Replies:** 4\
**Last updated:** [July 6, 2023, 2:03am UTC](https://discourse.julialang.org/t/matrix-sde-problem-and-dimension-mismatch/101194 "2023-07-06T02:03:57Z")

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Hi, I’m trying to fit an SDE model to elements of a 2x2 symmetric positive-definite matrix. I need to give separate BMs to all the elements, with the constraint that the off-diagonal elements are identical. ie have the s…

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## [VS Code - Broken/Lacking intellisense for propertynames](https://discourse.julialang.org/t/vs-code-broken-lacking-intellisense-for-propertynames/101231)

<div class="topic-metadata">

**Author:** [@algunion](https://discourse.julialang.org/u/algunion)\
**Replies:** 1\
**Last updated:** [July 6, 2023, 1:23am UTC](https://discourse.julialang.org/t/vs-code-broken-lacking-intellisense-for-propertynames/101231 "2023-07-06T01:23:46Z")

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Is there a known reason why propertynames related auto-completion doesn’t work in Julia VS Code? I tested things on Pluto, and it works fine (see video). You should be able to reproduce the thing with the C…

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## [Floating number matrix, equal matrix in whole, but not equal column](https://discourse.julialang.org/t/floating-number-matrix-equal-matrix-in-whole-but-not-equal-column/101200)

<div class="topic-metadata">

**Author:** [@maxchendt](https://discourse.julialang.org/u/maxchendt)\
**Replies:** 3\
**Last updated:** [July 5, 2023, 10:14pm UTC](https://discourse.julialang.org/t/floating-number-matrix-equal-matrix-in-whole-but-not-equal-column/101200 "2023-07-05T22:14:55Z")

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norm(Y - B \* A, Inf) is 0, but when comparing individual columns, such as Y\[:,4\] - B \* A\[:,4\] is not zero. Why? using TranscodingStreams, CodecXz, Serialization, Downloads using LinearAlgebra function urlData(url, f…

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