# Latest

**URL:** https://discourse.julialang.org/latest.md?page=667

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

**Page:** 668

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## [\[ANN\] CondaPkg.jl: Add Conda dependencies to your Julia project](https://discourse.julialang.org/t/ann-condapkg-jl-add-conda-dependencies-to-your-julia-project/73034)

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**Author:** [@cjdoris](https://discourse.julialang.org/u/cjdoris)\
**Replies:** 5\
**Last updated:** [June 19, 2023, 9:01am UTC](https://discourse.julialang.org/t/ann-condapkg-jl-add-conda-dependencies-to-your-julia-project/73034 "2023-06-19T09:01:34Z")

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Conda is a cross-platform package manager, originally used to manage the Anaconda Python distribution, but also handles non-Python packages too. CondaPkg.jl is a bit like Pkg but for managing Conda dependencies. This p…

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## [CairoMakie - how set a name for a figure?](https://discourse.julialang.org/t/cairomakie-how-set-a-name-for-a-figure/100522)

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**Author:** [@PeteS](https://discourse.julialang.org/u/PeteS)\
**Replies:** 2\
**Last updated:** [June 19, 2023, 8:55am UTC](https://discourse.julialang.org/t/cairomakie-how-set-a-name-for-a-figure/100522 "2023-06-19T08:55:34Z")

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Hi, I’m using CairoMakie in VSCode, viewing the plots in the Julia Plots tab and switching between them using the Plot Navigator of the Julia extension tab. Is there any way to set a meaningful name of a Figure() so tha…

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## [Graph Plot with Custom Nodes](https://discourse.julialang.org/t/graph-plot-with-custom-nodes/100446)

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**Author:** [@flobe](https://discourse.julialang.org/u/flobe)\
**Replies:** 4\
**Last updated:** [June 19, 2023, 8:36am UTC](https://discourse.julialang.org/t/graph-plot-with-custom-nodes/100446 "2023-06-19T08:36:10Z")

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Hi all :slight\_smile: I’m currently working with GraphPlot.jl to visualize my data - works fine. However I want to enrich the visualization so that you can see the confidence of the nodes/data in the graph during the si…

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## [Are there online algorithms to solve/update Neural SDGs solutions incrementally?](https://discourse.julialang.org/t/are-there-online-algorithms-to-solve-update-neural-sdgs-solutions-incrementally/100385)

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**Author:** [@schlichtanders](https://discourse.julialang.org/u/schlichtanders)\
**Replies:** 2\
**Last updated:** [June 19, 2023, 8:09am UTC](https://discourse.julialang.org/t/are-there-online-algorithms-to-solve-update-neural-sdgs-solutions-incrementally/100385 "2023-06-19T08:09:29Z")

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Hi there, I am looking around for online algorithms to fit probablistic models for timeseries data. Neural Stochastic Differential Equations (as a subclass of Universal Differential Equations if I understood it right) s…

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## [Saving heatmap as pdf resolution](https://discourse.julialang.org/t/saving-heatmap-as-pdf-resolution/100499)

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**Author:** [@Peter\_Uhl1](https://discourse.julialang.org/u/Peter_Uhl1)\
**Replies:** 4\
**Last updated:** [June 19, 2023, 7:50am UTC](https://discourse.julialang.org/t/saving-heatmap-as-pdf-resolution/100499 "2023-06-19T07:50:40Z")

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I’m trying to save a simple 100x100 heatmap as a pdf. When I do, the heatmap ends up looking blurry in the saved image. Just doing heatmap(rand(100,100)) savefig("stuff.pdf") saves a pdf with the axis labels, colorbar,…

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## [Is there any way to check the installation time of a package?](https://discourse.julialang.org/t/is-there-any-way-to-check-the-installation-time-of-a-package/100509)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 10\
**Last updated:** [June 19, 2023, 7:44am UTC](https://discourse.julialang.org/t/is-there-any-way-to-check-the-installation-time-of-a-package/100509 "2023-06-19T07:44:32Z")

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I can’t remember under what circumstance I installed a certain package. Is there any way to check its installation time to help me recall that? Besides, when the number of packages grows is there any good solution to man…

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## [Problem in defining a system of differential equations](https://discourse.julialang.org/t/problem-in-defining-a-system-of-differential-equations/100536)

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**Author:** [@Enc](https://discourse.julialang.org/u/Enc)\
**Replies:** 1\
**Last updated:** [June 19, 2023, 6:41am UTC](https://discourse.julialang.org/t/problem-in-defining-a-system-of-differential-equations/100536 "2023-06-19T06:41:01Z")

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I have a system of ODE in matrix form with initial condition: C is user defined diagonal matrix is column vector is user defined matrix P is user defined vector I’m tried define ODE system by this code: using…

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## [Why does Visual Studio Code not correctly render "isa" statement?](https://discourse.julialang.org/t/why-does-visual-studio-code-not-correctly-render-isa-statement/100511)

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**Author:** [@Ahmed\_Salih](https://discourse.julialang.org/u/Ahmed_Salih)\
**Replies:** 4\
**Last updated:** [June 19, 2023, 4:13am UTC](https://discourse.julialang.org/t/why-does-visual-studio-code-not-correctly-render-isa-statement/100511 "2023-06-19T04:13:37Z")

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Hello! In VS Code suppose I have the following snippet: if isa(true,Bool) println("This is true") end if true isa Bool println("This is true too") end You even see how the code statement here actually renders…

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## [Solving the Boltzmann transport equation using Julia?](https://discourse.julialang.org/t/solving-the-boltzmann-transport-equation-using-julia/100495)

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**Author:** [@WarmConsidering](https://discourse.julialang.org/u/WarmConsidering)\
**Replies:** 9\
**Last updated:** [June 18, 2023, 10:00pm UTC](https://discourse.julialang.org/t/solving-the-boltzmann-transport-equation-using-julia/100495 "2023-06-18T22:00:15Z")

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Hi all, I’d like to use Julia to solve the time-independent Boltzmann transport equation (BTE) over unstructured grids in 2 or 3 dimensions using the Sn method for neutrons. So far I’ve identified Trixi.jl and Gridap.jl …

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## [Efficient multiplication between a low-rank matrix approximation and a vector](https://discourse.julialang.org/t/efficient-multiplication-between-a-low-rank-matrix-approximation-and-a-vector/100512)

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**Author:** [@danieleavitabile](https://discourse.julialang.org/u/danieleavitabile)\
**Replies:** 6\
**Last updated:** [June 18, 2023, 6:02pm UTC](https://discourse.julialang.org/t/efficient-multiplication-between-a-low-rank-matrix-approximation-and-a-vector/100512 "2023-06-18T18:02:31Z")

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Dear All, I am quite new to Julia, and I am searching for a recommendation. Calling svd(A), I obtain a singular-value decomposition object that gives me access to the U, S, V, as discussed in the documentation. I am in…

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## [CondaPkg error](https://discourse.julialang.org/t/condapkg-error/100523)

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**Author:** [@e3c6](https://discourse.julialang.org/u/e3c6)\
**Replies:** 2\
**Last updated:** [June 18, 2023, 5:59pm UTC](https://discourse.julialang.org/t/condapkg-error/100523 "2023-06-18T17:59:31Z")

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I’ve been getting errors like this lately, from CondaPkg: critical libmamba filesystem error: cannot copy symlink: Operation not permitted \[~/.julia/scratchspaces/0b3b1443-0f03-428d-bdfb-f27f9c1191ea/root/pkgs/libstdcx…

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## [Authentic math notations](https://discourse.julialang.org/t/authentic-math-notations/100519)

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**Author:** [@SarK0Y](https://discourse.julialang.org/u/SarK0Y)\
**Replies:** 3\
**Last updated:** [June 18, 2023, 4:30pm UTC](https://discourse.julialang.org/t/authentic-math-notations/100519 "2023-06-18T16:30:56Z")

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Hi, Guys. i need some workaround to make something like this.. x = x² = x^2 well, it’s possible to have var “x²”, but i want operation ² ＝ ^2 +++++++ Thanks a lot in Advance.

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## [User-defined type used in a module differs from the original](https://discourse.julialang.org/t/user-defined-type-used-in-a-module-differs-from-the-original/100518)

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**Author:** [@jodyxha](https://discourse.julialang.org/u/jodyxha)\
**Replies:** 1\
**Last updated:** [June 18, 2023, 2:55pm UTC](https://discourse.julialang.org/t/user-defined-type-used-in-a-module-differs-from-the-original/100518 "2023-06-18T14:55:57Z")

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I am a newbie with Julia (thigh not with programming in general). Asn exercise i wanted to some simple 3D geometry modules. One module for 3D vectors (Vec3D) which includes an overloaded operator “^” for the outer prod…

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## [JavaCallError when using Spark.jl](https://discourse.julialang.org/t/javacallerror-when-using-spark-jl/100496)

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**Author:** [@taotree](https://discourse.julialang.org/u/taotree)\
**Replies:** 1\
**Last updated:** [June 18, 2023, 12:41pm UTC](https://discourse.julialang.org/t/javacallerror-when-using-spark-jl/100496 "2023-06-18T12:41:38Z")

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When running using Spark: julia\> using Spark ERROR: InitError: JavaCall.JavaCallError("JULIA\_COPY\_STACKS should not be set on Windows.") Stacktrace: \[1\] assertroottask\_or\_goodenv @ C:\\Users\\joel\\.julia\\packages\\Ja…

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## [Similar MArray with different size](https://discourse.julialang.org/t/similar-marray-with-different-size/100490)

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**Author:** [@nicolas](https://discourse.julialang.org/u/nicolas)\
**Replies:** 7\
**Last updated:** [June 18, 2023, 12:37pm UTC](https://discourse.julialang.org/t/similar-marray-with-different-size/100490 "2023-06-18T12:37:43Z")

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I want to create an array similar to some other array, which could be an Array, a MArray, or some other kind of mutable array-like container. But I would also like to set its dimensions to m×n. I’ve tried similar and it …

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## [Multiple Widgets and Plots (Interact, Plotly)](https://discourse.julialang.org/t/multiple-widgets-and-plots-interact-plotly/100508)

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**Author:** [@StrangePlay](https://discourse.julialang.org/u/StrangePlay)\
**Replies:** 0\
**Last updated:** [June 18, 2023, 7:34am UTC](https://discourse.julialang.org/t/multiple-widgets-and-plots-interact-plotly/100508 "2023-06-18T07:34:48Z")

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Hello folks, Not sure if this is the right place for this question (if not please direct me there). I’m trying to plot 4 plots on a 2 x 2 layout using Interact, Plotly (plotlyjs backend) along with a massive number of …

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## [Setup CompatHelper for subdir in the Github Actions](https://discourse.julialang.org/t/setup-compathelper-for-subdir-in-the-github-actions/100506)

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**Author:** [@Manul](https://discourse.julialang.org/u/Manul)\
**Replies:** 0\
**Last updated:** [June 18, 2023, 6:31am UTC](https://discourse.julialang.org/t/setup-compathelper-for-subdir-in-the-github-actions/100506 "2023-06-18T06:31:59Z")

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Hello Julia Community! I am new to Julia and DevOps. I want to setup CompatHelper for the original repo Bloqade.jl which checks top dir for Project.toml and also the sub directories inside lib/\*/. For the above task, I…

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## [Error when using CUDA.dot() in kernel](https://discourse.julialang.org/t/error-when-using-cuda-dot-in-kernel/100476)

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**Author:** [@huiyuxie](https://discourse.julialang.org/u/huiyuxie)\
**Replies:** 2\
**Last updated:** [June 18, 2023, 5:13am UTC](https://discourse.julialang.org/t/error-when-using-cuda-dot-in-kernel/100476 "2023-06-18T05:13:27Z")

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Here is a very simple version of trying to compute dot product in GPU kernel. Having tried c\[i\] = transpose(a\[i, :\]) \* b\[:, i\] c\[i\] = CUDA.dot(a\[i, :\], b\[:, i\]) c\[i\] = CUBLAS.dot(4, a\[i, :\], b\[:, i\]) but all reported…

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## [How to compile the julia code into c language?](https://discourse.julialang.org/t/how-to-compile-the-julia-code-into-c-language/76573)

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**Author:** [@Amro](https://discourse.julialang.org/u/Amro)\
**Replies:** 24\
**Last updated:** [June 18, 2023, 2:23am UTC](https://discourse.julialang.org/t/how-to-compile-the-julia-code-into-c-language/76573 "2023-06-18T02:23:35Z")

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I have my code in julia language, can I generated a C code for it?

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## [Issue with Flux BatchNorm](https://discourse.julialang.org/t/issue-with-flux-batchnorm/100313)

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**Author:** [@tchebycheff](https://discourse.julialang.org/u/tchebycheff)\
**Replies:** 2\
**Last updated:** [June 18, 2023, 12:22am UTC](https://discourse.julialang.org/t/issue-with-flux-batchnorm/100313 "2023-06-18T00:22:05Z")

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A simple example with input as a 4 x 20 matrix (each feature vector has 4 elements). This is PyTorch BatchNorm1d, which has essentially the same default set-up as Flux BatchNorm i.e. affine = true, track\_stats = true, m…

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## [How to get weight and bias from the NeuralPDE after solving](https://discourse.julialang.org/t/how-to-get-weight-and-bias-from-the-neuralpde-after-solving/100481)

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**Author:** [@Ethan\_Tran](https://discourse.julialang.org/u/Ethan_Tran)\
**Replies:** 5\
**Last updated:** [June 17, 2023, 11:52pm UTC](https://discourse.julialang.org/t/how-to-get-weight-and-bias-from-the-neuralpde-after-solving/100481 "2023-06-17T23:52:57Z")

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I try to use NeuralPDE to solve the differential equations. How could I get the weight and bias from network and may I use the weight after solving to predict the similar problem? Thank you all.

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## [Speed up multilevel model in Turing.jl](https://discourse.julialang.org/t/speed-up-multilevel-model-in-turing-jl/100201)

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**Author:** [@JanG](https://discourse.julialang.org/u/JanG)\
**Replies:** 15\
**Last updated:** [June 17, 2023, 7:40pm UTC](https://discourse.julialang.org/t/speed-up-multilevel-model-in-turing-jl/100201 "2023-06-17T19:40:44Z")

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Hi everybody, I’ve coded up a multilevel model with random intercepts and slopes in Turing (see below). However, my model is very slow compared to similar models in Stan. Does anybody have any insights on how to speed t…

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## [Profiling in VSCode shows blank tab on first run?](https://discourse.julialang.org/t/profiling-in-vscode-shows-blank-tab-on-first-run/100492)

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**Author:** [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Replies:** 2\
**Last updated:** [June 17, 2023, 6:10pm UTC](https://discourse.julialang.org/t/profiling-in-vscode-shows-blank-tab-on-first-run/100492 "2023-06-17T18:10:49Z")

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Hi everyone, In the last few weeks, I have found that the @profview macro from the VSCode extension shows a blank tab the first time I run it, and then gives me the flame graph on the second run. Does it happen to anyon…

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## [Package extensions for Julia \< 1.9](https://discourse.julialang.org/t/package-extensions-for-julia-1-9/93397)

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**Author:** [@tfiers](https://discourse.julialang.org/u/tfiers)\
**Replies:** 23\
**Last updated:** [June 17, 2023, 5:58pm UTC](https://discourse.julialang.org/t/package-extensions-for-julia-1-9/93397 "2023-06-17T17:58:00Z")

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Package extensions are an exciting new feature of julia 1.9 {links for more info about them}julia/NEWS.md at v1.9.0-beta3 · JuliaLang/julia · GitHub https://pkgdocs.julialang.org/dev/creating-packages/#Conditional-loadi…

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## [How to show loss value of the neural network after solving by Neural.NNODE?](https://discourse.julialang.org/t/how-to-show-loss-value-of-the-neural-network-after-solving-by-neural-nnode/100241)

<div class="topic-metadata">

**Author:** [@Ethan\_Tran](https://discourse.julialang.org/u/Ethan_Tran)\
**Replies:** 1\
**Last updated:** [June 17, 2023, 2:33pm UTC](https://discourse.julialang.org/t/how-to-show-loss-value-of-the-neural-network-after-solving-by-neural-nnode/100241 "2023-06-17T14:33:43Z")

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I am using NeuralPDE to solve the ODE system. Because the iterations of the network are high (I choose 3000), I set the verbose as false as the following code to cut off the displaying of current loss: chain = Flux.Chai…

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## [OffsetArrays vs Arrays speed](https://discourse.julialang.org/t/offsetarrays-vs-arrays-speed/100477)

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**Author:** [@gte465f](https://discourse.julialang.org/u/gte465f)\
**Replies:** 4\
**Last updated:** [June 17, 2023, 2:12pm UTC](https://discourse.julialang.org/t/offsetarrays-vs-arrays-speed/100477 "2023-06-17T14:12:01Z")

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Hello Julia wizards! I’ve been exploring this language for about a week, and so far I’m very very intrigued. I have a simulation code I’m writing that would greatly benefit from using OffsetArrays, but everything I try …

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## [SplitODEProblem](https://discourse.julialang.org/t/splitodeproblem/100061)

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**Author:** [@jtgreen](https://discourse.julialang.org/u/jtgreen)\
**Replies:** 5\
**Last updated:** [June 17, 2023, 2:00pm UTC](https://discourse.julialang.org/t/splitodeproblem/100061 "2023-06-17T14:00:21Z")

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Is it possible to use other combinations of solvers for instance forward euler for an explicit method and CVODE\_BDF from sundials (w/ linear\_solver=:GMRES) for the implicit? Rather than the provided combinations listed i…

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## [Should Tulip catch SQDExceptions thrown by LDLFactorizations?](https://discourse.julialang.org/t/should-tulip-catch-sqdexceptions-thrown-by-ldlfactorizations/100487)

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**Author:** [@nsajko](https://discourse.julialang.org/u/nsajko)\
**Replies:** 0\
**Last updated:** [June 17, 2023, 1:08pm UTC](https://discourse.julialang.org/t/should-tulip-catch-sqdexceptions-thrown-by-ldlfactorizations/100487 "2023-06-17T13:08:55Z")

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@mtanneau Sometimes MathOptInterface.optimize!(::Tulip.Optimizer{BigFloat}) throws an LDLFactorizations.SQDException: ERROR: LoadError: LDLFactorizations.SQDException("LDL' factorization was not computed or failed") Sta…

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## [Matrix multipcation broadcasting?](https://discourse.julialang.org/t/matrix-multipcation-broadcasting/100483)

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**Author:** [@zxygentoo](https://discourse.julialang.org/u/zxygentoo)\
**Replies:** 3\
**Last updated:** [June 17, 2023, 9:33am UTC](https://discourse.julialang.org/t/matrix-multipcation-broadcasting/100483 "2023-06-17T09:33:22Z")

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Hi everyone, I’m trying to do the nanoGPT tutorial by Andrej Karpathy and stuck at a little piece of code something like this: import troch B, T, C = 32, 8, 65 x = torch.randn(B, T, C) wei = torch.tril(torch.ones(T,…

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## [Must local projects include packages of interest only to deveolpers?](https://discourse.julialang.org/t/must-local-projects-include-packages-of-interest-only-to-deveolpers/100450)

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**Author:** [@frylock](https://discourse.julialang.org/u/frylock)\
**Replies:** 8\
**Last updated:** [June 17, 2023, 8:37am UTC](https://discourse.julialang.org/t/must-local-projects-include-packages-of-interest-only-to-deveolpers/100450 "2023-06-17T08:37:56Z")

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I’m sure I read something about this somewhere in here, just can’t remember where. I am developing a local package (Python app replacement candidate). I’d like to be able to use BenchmarkTools.jl, AQUA.jl, Debugging.jl,…

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