Hello, I have a basic question: I want to know the difference between OrdinaryDiffEq.jl and DifferentialEquations.jl. I know that OrdinaryDiffEq.jl is a subset of DifferentialEquations.jl but on the user interface, t…
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## [\[Makie\] Get data from figure](https://discourse.julialang.org/t/makie-get-data-from-figure/96053)
Given a Figure, is it possible to get the Arrays with the data? I want to do tests on automatically setting legal limits for log scale plots by automatically adjusting limits to hide the offending points, and printing a …
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## [ModelingToolkit -- news?](https://discourse.julialang.org/t/modelingtoolkit-news/111126)
There seems to be a few changes to the latest versions of ModelingToolkit: Constructor ODESystem now requires the independent variable as second argument \[e.g., ODESystem(eqs,t) – in the past, the constructor tried to…
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## [Plotting slow](https://discourse.julialang.org/t/plotting-slow/111083)
We are currently working on a simulation and the bottleneck is plotting. We are plotting a grid of dimension 1000 x 2000 and saving it. T\_c\_hm = heatmap(x, y, transpose(T\_c\_renh), size = (1000, 400), clim=(0, 0.3)) …
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## [Package Specific Environment Variables in JLL](https://discourse.julialang.org/t/package-specific-environment-variables-in-jll/111116)
I would like to package OpenFOAM from www.openfoam.com with BinaryBuilder and use it for my research. Towards this goal, I have been able to build a JLL using BinaryBuilder for the Linux x86\_64 platform see here using t…
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## [Build Julia with debug files](https://discourse.julialang.org/t/build-julia-with-debug-files/111131)
Is there a way to enable generating debug info with the release build. I know that you can build a debug version in cygwin with “make -j 4 debug” but this will append “-debug” to julia.exe and some dll’s. I tried removin…
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## [A tip for integrating your new format without changing \`FileIO\`'s registry](https://discourse.julialang.org/t/a-tip-for-integrating-your-new-format-without-changing-fileio-s-registry/111129)
I tried to implement a new data format for internal use and share how I register a new data format without altering FileIO’s registry. It’s obvious to someone, but I hope someone finds it helpful. List of solutions To i…
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## [My first Agents.jl project - Toy model of rental market](https://discourse.julialang.org/t/my-first-agents-jl-project-toy-model-of-rental-market/111127)
I have long been interested in agent based simulations so I played around with Agents.jl to make a toy model of rental market. I published it here: GitHub - PiotrZakrzewski/real-estate-sim: Julia Agent Simulation of Rea…
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## [Garbage collection not triggering on SLURM cluster](https://discourse.julialang.org/t/garbage-collection-not-triggering-on-slurm-cluster/95675)
Hi, So we are trying to run parallelised code on our SLURM based cluster however are quickly encountering large scale memory issues. The memory utilisation is much more than a single loop of code will generate suggestin…
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## [Package to evaluate oscillating integrals with increasing frequency](https://discourse.julialang.org/t/package-to-evaluate-oscillating-integrals-with-increasing-frequency/108565)
I’m looking to numerically integrate a function of the form int\[g(x)\*sin(r(x)\*x) dx, x=a...infinity\] Where g(x) is exponentially decaying and the frequency r(x) = A+B\*sqrt(1+x^2) is increasing with x. I saw GitHub - x…
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## [This month in Julia world - 2024-02](https://discourse.julialang.org/t/this-month-in-julia-world-2024-02/110988)
A monthly newsletter, mostly on julia internals, digestible for casual observers. A biased, incomplete, editorialized list of what I found interesting this month, with contributions from the community. “Internals” Fora …
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## [Determinant of an integer matrix is float](https://discourse.julialang.org/t/determinant-of-an-integer-matrix-is-float/111107)
Why isn’t it an int? julia\> a, c, b, d = M = \[10 20; 30 40\]; a\*d - b\*c , det(M) (-200, -200.00000000000003)
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## [Makie axis limits aren't set if infinite values present](https://discourse.julialang.org/t/makie-axis-limits-arent-set-if-infinite-values-present/111114)
The y values include some -Infs and it looks like that makes the axis limits give up. Is that expected behavior? scatter(1:1000, \[log(10^k) for k in -1.0:-1:-1000\])
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## [Keywords using and import: are they really needed both?](https://discourse.julialang.org/t/keywords-using-and-import-are-they-really-needed-both/111104)
A longish discussion has been going back and forth what to do about these two keywords. Consider the following code: module Foo export nice, DOG struct Dog end # singleton type, not exported const DOG = Dog() #…
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## [Makie realtime plot draws line from start datapoint after some time - BUG](https://discourse.julialang.org/t/makie-realtime-plot-draws-line-from-start-datapoint-after-some-time-bug/111111)
This is code for a realtime updating Makie line plot. It is setup to let you pan the chart on click. If you let it proceed to about +3 days from the start data point it draws a straight line from the first data point t…
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## [\`mergewith\` issue with \`Unitful\`](https://discourse.julialang.org/t/mergewith-issue-with-unitful/111087)
I’ve been using mergewith(+, …) with Dicts containing Unitful values, and it worked great for a while … until it suddenly didn’t. And slight reorganization of the arguments made it work again, so I’m not quite sure what’…
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## [Picking an AD Backend and Enzyme Errors](https://discourse.julialang.org/t/picking-an-ad-backend-and-enzyme-errors/111075)
I’m working on an optimization problem for a paper of the form cost(θ) =\> scalar, where θ is potentially large, maybe 100-200 dimensional. I was under the assumption reverse mode AD is appropriate for this task, howeve…
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## [Combined sliders with values shown](https://discourse.julialang.org/t/combined-sliders-with-values-shown/111101)
I am trying to render a bunch of custom sliders that show value with the slider. This function works just fine: function slider\_value(;default = 28, min = 1, max = 100) @htl("""\
**Author:** [@AliC](https://discourse.julialang.org/u/AliC)\
**Replies:** 1\
**Last updated:** [March 3, 2024, 7:42pm UTC](https://discourse.julialang.org/t/converting-3d-delaunaytriangulation-into-mesh/111073 "2024-03-03T19:42:47Z")
I have a DelaunayTriangulation.Triangulation that contains 3D points. I want to plot it using Makie, but I’ve only seen that 2D triangulations can be plotted directly using triplot. If I try to triplot the 3D triangulat…
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## [Poor Mesh Plot from Makie - How to fix it?](https://discourse.julialang.org/t/poor-mesh-plot-from-makie-how-to-fix-it/111064)
Dear All, I am using the package Weave.jl in VSCODE (filetype: .jmd). When I write julia code within the julia code block \`\`\`julia \`\`\` the code is not indented properly, e.g., if I start a for loop, the code looks li…
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## [DiffEqGPU - slow parallel solving of SDEs on GPU](https://discourse.julialang.org/t/diffeqgpu-slow-parallel-solving-of-sdes-on-gpu/110814)
Hi all, As part of a broader project to run SDEs on GPU, I was taking a stab first at the example on the SciML website, slightly modified with a number of trajectories set to 250e3 to have a better idea of how much time…
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## [Module scope and distributed computing](https://discourse.julialang.org/t/module-scope-and-distributed-computing/111014)
I have a rather extensive and inaccessible algorithm that deploys distributed computing. To make it more accessible, I want to wrap as much of the algorithm into the functions of my package. I manage to initialize my va…
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## [CHERI-RISC-V and CHERI-x86-64, CHERI-extended ISAs for capability](https://discourse.julialang.org/t/cheri-risc-v-and-cheri-x86-64-cheri-extended-isas-for-capability/108861)
CHERI is over decade old research project, but it seems like hardware is already available for RISC-V. I find this intriguing, and Julia may want to support eventually. Note the ISA extension(s) has changed recently, not…
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## [Mutating a view (not the underlying array)](https://discourse.julialang.org/t/mutating-a-view-not-the-underlying-array/111089)
I have a question about views. I have a vector P::Vector in which I want to find a subset with a specific property. This can be done incrementally. I use a loop like this: idxs = collect(eachindex(P)) Psubset = view(P,…
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## [Debounce notfication of an Observable](https://discourse.julialang.org/t/debounce-notfication-of-an-observable/111079)
Is there a simple way to debounce a function call like in js’ Lodash? I want to notfiy an Observable at most once every 0.25s. This is useful for performance reasons in Makie. obs = Observable(1) notify(obs, debounce=…
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## ["musl" Linux](https://discourse.julialang.org/t/musl-linux/111039)
What IS the “musl” linux? I don’t understand any of the verbiage I’ve seen about it. :frowning: Please type slowly as I’m not a quick learner anymore… Thanks, David
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## [Test expression for instance of variable](https://discourse.julialang.org/t/test-expression-for-instance-of-variable/110740)
Is there a way of testing a symbolic expression to see if it contains a given variable other than seeing if the derivative is zero. For example test (r\*sin(th))^2 to see if it contains th. Is there a way of looking at …
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## [Is matrix multiplication multi-threaded for Double64?](https://discourse.julialang.org/t/is-matrix-multiplication-multi-threaded-for-double64/111081)
I tested multiplication of two Double64 matrices and saw no effects on performance by using BLAS.set\_num\_threads(n).
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## [Teaching class at University | Automatic Homework Grading](https://discourse.julialang.org/t/teaching-class-at-university-automatic-homework-grading/64974)
Hey, we are planning to offer a university course about image processing in microscopy which includes some exercises. I was wondering whether anyone has some tips&tricks for automatic homework correction and what turne…
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