# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=25

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**Page:** 26

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## [Fitting multiple datasets simultaneously](https://discourse.julialang.org/t/fitting-multiple-datasets-simultaneously/132176)

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**Author:** [@soniamitchell](https://discourse.julialang.org/u/soniamitchell)\
**Replies:** 9\
**Last updated:** [September 25, 2025, 1:10pm UTC](https://discourse.julialang.org/t/fitting-multiple-datasets-simultaneously/132176 "2025-09-25T13:10:28Z")

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I want to fit a model to multiple datasets simultaneously, with some fitted parameters being shared across datasets. Is it possible to do this using Turing.jl?

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## [Gaussian process with noisy heteroscedastic correlated targets (outputs)](https://discourse.julialang.org/t/gaussian-process-with-noisy-heteroscedastic-correlated-targets-outputs/132582)

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**Author:** [@mocalvao](https://discourse.julialang.org/u/mocalvao)\
**Replies:** 2\
**Last updated:** [September 25, 2025, 11:12am UTC](https://discourse.julialang.org/t/gaussian-process-with-noisy-heteroscedastic-correlated-targets-outputs/132582 "2025-09-25T11:12:43Z")

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Hi there, I have 2 kinds of datasets to which I would like to fit a Gaussian process: (1) a dataset with N observations: (x\_i, y\_i, \\sigma\_i) , i=1, 2, ..., N, where x\_i are the input (covariate) variables, y\_i the out…

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## [MadIPM: A GPU-accelerated interior-point solver for large-scale LPs](https://discourse.julialang.org/t/madipm-a-gpu-accelerated-interior-point-solver-for-large-scale-lps/132630)

<div class="topic-metadata">

**Author:** [@amontoison](https://discourse.julialang.org/u/amontoison)\
**Replies:** 4\
**Last updated:** [September 25, 2025, 9:45am UTC](https://discourse.julialang.org/t/madipm-a-gpu-accelerated-interior-point-solver-for-large-scale-lps/132630 "2025-09-25T09:45:51Z")

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We have released MadIPM, a GPU-accelerated interior-point solver for large-scale linear programming. :tada: This work is done in collaboration with @sshin23 and @frapac. MadIPM is built on top of MadNLP. It implements …

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## [Makie: rich text, markdown?](https://discourse.julialang.org/t/makie-rich-text-markdown/132650)

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**Author:** [@ryofurue](https://discourse.julialang.org/u/ryofurue)\
**Replies:** 1\
**Last updated:** [September 25, 2025, 9:32am UTC](https://discourse.julialang.org/t/makie-rich-text-markdown/132650 "2025-09-25T09:32:38Z")

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I’m looking for a way to produce rich text easily in Makie plots. I know LaTeX strings work in Makie: this thread. But the LaTeX font (Computer Modern) is less legible than Makie’s default one. Its rich text produces mo…

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## [StackOverflowError, MutableArithmetics jump variables](https://discourse.julialang.org/t/stackoverflowerror-mutablearithmetics-jump-variables/132629)

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**Author:** [@Ceserik](https://discourse.julialang.org/u/Ceserik)\
**Replies:** 5\
**Last updated:** [September 25, 2025, 7:40am UTC](https://discourse.julialang.org/t/stackoverflowerror-mutablearithmetics-jump-variables/132629 "2025-09-25T07:40:10Z")

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Hello, I am making a tool to find fastest possible lap time for racing car, I am trying to use same function for initial value problem solving and also for optimisation in julia. The function describes behavior of a car.…

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## [KernelAbstractions + Enzyme - how to do GPU-side autodiff?](https://discourse.julialang.org/t/kernelabstractions-enzyme-how-to-do-gpu-side-autodiff/132643)

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**Author:** [@jl\_enthusiast](https://discourse.julialang.org/u/jl_enthusiast)\
**Replies:** 1\
**Last updated:** [September 25, 2025, 6:34am UTC](https://discourse.julialang.org/t/kernelabstractions-enzyme-how-to-do-gpu-side-autodiff/132643 "2025-09-25T06:34:49Z")

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Hello, I recently tried to (and failed) to auto-differentiate kernels with Enzyme.jl, written using KernelAbstractions.jl. I tried to search for examples in other packages, but could not find any concrete examples of E…

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## [Solving Optimization of Least Squares Term with Quadratic Term with Memory Infeasible Matrix](https://discourse.julialang.org/t/solving-optimization-of-least-squares-term-with-quadratic-term-with-memory-infeasible-matrix/132599)

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**Author:** [@RoyiAvital](https://discourse.julialang.org/u/RoyiAvital)\
**Replies:** 2\
**Last updated:** [September 24, 2025, 2:41pm UTC](https://discourse.julialang.org/t/solving-optimization-of-least-squares-term-with-quadratic-term-with-memory-infeasible-matrix/132599 "2025-09-24T14:41:15Z")

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I want to solve: \\arg \\min\_{\\boldsymbol{x}} \\frac{\\lambda}{2} \\boldsymbol{x}^{T} \\boldsymbol{E}^{T} \\boldsymbol{K} \\boldsymbol{E} \\boldsymbol{x} + \\frac{\\rho}{2} {\\left\\| \\boldsymbol{A} \\boldsymbol{x} - \\boldsymbol{y} …

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## [Makie.jl keyword argument recipes (v0.24)](https://discourse.julialang.org/t/makie-jl-keyword-argument-recipes-v0-24/132603)

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**Author:** [@jrbaxter0](https://discourse.julialang.org/u/jrbaxter0)\
**Replies:** 5\
**Last updated:** [September 24, 2025, 1:43pm UTC](https://discourse.julialang.org/t/makie-jl-keyword-argument-recipes-v0-24/132603 "2025-09-24T13:43:19Z")

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I would like to request some help updating some of my plotting recipes to the new v0.24 style. I know the issue lies with the new attribute system and the computational graph (and no longer being able to manipulate it li…

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## [ForwardDiff with Rosenbrock in DifferentialEquations.jl](https://discourse.julialang.org/t/forwarddiff-with-rosenbrock-in-differentialequations-jl/132605)

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**Author:** [@Bill\_Holmes](https://discourse.julialang.org/u/Bill_Holmes)\
**Replies:** 2\
**Last updated:** [September 23, 2025, 8:51pm UTC](https://discourse.julialang.org/t/forwarddiff-with-rosenbrock-in-differentialequations-jl/132605 "2025-09-23T20:51:39Z")

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Hello all. I am having an issue using Rosenbrock methods in DifferentialEquations.jl. Below is a MWE. My general problem is that I am trying to optimize parameters of a stiff system of ODEs. This is a relatively small pr…

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## [What is the correct way to autodiff a simple CUDA kernel using Reactant.jl and Enzyme.jl](https://discourse.julialang.org/t/what-is-the-correct-way-to-autodiff-a-simple-cuda-kernel-using-reactant-jl-and-enzyme-jl/132572)

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**Author:** [@TiangeHuang-Cedric](https://discourse.julialang.org/u/TiangeHuang-Cedric)\
**Replies:** 20\
**Last updated:** [September 23, 2025, 7:58pm UTC](https://discourse.julialang.org/t/what-is-the-correct-way-to-autodiff-a-simple-cuda-kernel-using-reactant-jl-and-enzyme-jl/132572 "2025-09-23T19:58:25Z")

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I’m new to Reactant.jl and Enzyme.jl, and I want to use them to calculate the grad of a CUDA kernel. Here is my script: using Random, Reactant, CUDA, Test, Enzyme const ReactantCUDAExt = Base.get\_extension(Reactant, :R…

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## [How to take derivative of complex functions like Weierstrass Elliptic function?](https://discourse.julialang.org/t/how-to-take-derivative-of-complex-functions-like-weierstrass-elliptic-function/132591)

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**Author:** [@MathJulia](https://discourse.julialang.org/u/MathJulia)\
**Replies:** 5\
**Last updated:** [September 23, 2025, 5:48pm UTC](https://discourse.julialang.org/t/how-to-take-derivative-of-complex-functions-like-weierstrass-elliptic-function/132591 "2025-09-23T17:48:34Z")

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I want to use Elliptic and modular functions as activation functions in neural networks. What packages should I use? I can’t install EllipticFunctions.jl because it returns error. How could I apply chain rule to optimiz…

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## [GLMakie + ProfileView.jl segmentation fault](https://discourse.julialang.org/t/glmakie-profileview-jl-segmentation-fault/132515)

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**Author:** [@filchristou](https://discourse.julialang.org/u/filchristou)\
**Replies:** 4\
**Last updated:** [September 23, 2025, 2:34pm UTC](https://discourse.julialang.org/t/glmakie-profileview-jl-segmentation-fault/132515 "2025-09-23T14:34:01Z")

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After switching to Makie v0.24, I noticed that it no longer plays well with ProfileView.jl But at the moment I am not really sure, whether that is my laptop’s issue or even something coming from ProfileView.jl ? Could …

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## [How to mimick a Discrete Bayes Net in Turing.jl?](https://discourse.julialang.org/t/how-to-mimick-a-discrete-bayes-net-in-turing-jl/130319)

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**Author:** [@nicolasg](https://discourse.julialang.org/u/nicolasg)\
**Replies:** 5\
**Last updated:** [September 23, 2025, 1:16pm UTC](https://discourse.julialang.org/t/how-to-mimick-a-discrete-bayes-net-in-turing-jl/130319 "2025-09-23T13:16:40Z")

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Hi, I’ve been using Turing.jl for various purposes, and recently I thought it might be easy to mimick inference from a basic discrete bayesian network like I could do with BayesNets.jl like this for example: bn = Discr…

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## [Dataframe viewer needed](https://discourse.julialang.org/t/dataframe-viewer-needed/9239)

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**Author:** [@xiaodai](https://discourse.julialang.org/u/xiaodai)\
**Replies:** 28\
**Last updated:** [September 23, 2025, 12:36pm UTC](https://discourse.julialang.org/t/dataframe-viewer-needed/9239 "2025-09-23T12:36:25Z")

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I think a dataframe viewer where I can look at each row and column and if needed can scroll across up and down are needed. I know atom has a CSV editor plugin. Perhaps can repurpose that. I know it’s a lot of work but i…

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## [Packages for representing time series data](https://discourse.julialang.org/t/packages-for-representing-time-series-data/84699)

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**Author:** [@ohmsweetohm1](https://discourse.julialang.org/u/ohmsweetohm1)\
**Replies:** 14\
**Last updated:** [September 23, 2025, 12:55pm UTC](https://discourse.julialang.org/t/packages-for-representing-time-series-data/84699 "2025-09-23T12:55:50Z")

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DataFrames.jl seems to be the go to package for representing tabular data. It is very performant and well maintained. However, if someone has strictly structured data like time series data (i.e. a vector of timestamp an…

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## [VRP in cuOpt](https://discourse.julialang.org/t/vrp-in-cuopt/132546)

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**Author:** [@KSepetanc](https://discourse.julialang.org/u/KSepetanc)\
**Replies:** 3\
**Last updated:** [September 23, 2025, 9:53am UTC](https://discourse.julialang.org/t/vrp-in-cuopt/132546 "2025-09-23T09:53:51Z")

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First I want to thank the Authors that they implemented cuOpt API in Julia. I also wish to encourage to bundle cuOpt\_jll so that installation is easier. I would like to solve VRP’s with cuOpt, but the documentation only…

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## [MWE for directly calling libhighs (using HiGHS\_jll)](https://discourse.julialang.org/t/mwe-for-directly-calling-libhighs-using-highs-jll/132573)

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**Author:** [@asprionj](https://discourse.julialang.org/u/asprionj)\
**Replies:** 4\
**Last updated:** [September 23, 2025, 9:51am UTC](https://discourse.julialang.org/t/mwe-for-directly-calling-libhighs-using-highs-jll/132573 "2025-09-23T09:51:59Z")

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Hi everyone, I want to directly call into libhighs in HiGHS\_jll.jl, bypassing JuMP.jl and HiGHS.jl. First was to come up with a simple toy MILP-problem, to test if it basically works. The idea is to minimize 0.3x + 0.5y,…

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## [\[ANN\] LibASICamera - A wrapper for the ZWO ASI camera interface](https://discourse.julialang.org/t/ann-libasicamera-a-wrapper-for-the-zwo-asi-camera-interface/36607)

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**Author:** [@AlfTetzlaff](https://discourse.julialang.org/u/AlfTetzlaff)\
**Replies:** 1\
**Last updated:** [September 23, 2025, 2:22am UTC](https://discourse.julialang.org/t/ann-libasicamera-a-wrapper-for-the-zwo-asi-camera-interface/36607 "2025-09-23T02:22:05Z")

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Hey everybody, I spent the past weeks learning julia and wrote a wrapper for the ZWO ASI camera SDK. You can take a look at the result here: So far it works under Linux. I have not tested Mac, Win and RasPi so far, b…

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## [Seeking Insights: Tickerplants and Complex Event Processing (CEP) in Julia](https://discourse.julialang.org/t/seeking-insights-tickerplants-and-complex-event-processing-cep-in-julia/131980)

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**Author:** [@rohanshiloh](https://discourse.julialang.org/u/rohanshiloh)\
**Replies:** 4\
**Last updated:** [September 22, 2025, 9:54pm UTC](https://discourse.julialang.org/t/seeking-insights-tickerplants-and-complex-event-processing-cep-in-julia/131980 "2025-09-22T21:54:32Z")

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The functional programming language and time-series vector database q/KDB has a low-latency architecture for efficiently processing extremely large volumes of real-time financial data directly from exchanges like the NYS…

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## [SciMLSensitivity fails on GPU?](https://discourse.julialang.org/t/scimlsensitivity-fails-on-gpu/132575)

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**Author:** [@Iris\_Allevi](https://discourse.julialang.org/u/Iris_Allevi)\
**Replies:** 5\
**Last updated:** [September 22, 2025, 9:37pm UTC](https://discourse.julialang.org/t/scimlsensitivity-fails-on-gpu/132575 "2025-09-22T21:37:51Z")

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Hi all, I’m running into a problem when trying to compute gradients of an ODE solution on GPU (with Metal.jl) using SciMLSensitivity (SciMLSensitivity: Automatic Differentiation and Adjoints for (Differential) Equation …

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## [Only trivial solution in BifurcationKit](https://discourse.julialang.org/t/only-trivial-solution-in-bifurcationkit/132391)

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**Author:** [@acubed](https://discourse.julialang.org/u/acubed)\
**Replies:** 13\
**Last updated:** [September 22, 2025, 9:09pm UTC](https://discourse.julialang.org/t/only-trivial-solution-in-bifurcationkit/132391 "2025-09-22T21:09:03Z")

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I try to investigate pitchfork bifurcation, using the BifurcationKit. My problem looks as follow. I start from some definitions: ND = 500 dx = 1.0/ND x = collect(1:ND)\*dx.-dx/2 J = +1.0 beta0 = 0.1 u0 = 0.01\*ones(Float…

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## [Discretization of semi-coupled wave and diffusion equations fails for step size of pi/(25n) using MethodOfLines.jl](https://discourse.julialang.org/t/discretization-of-semi-coupled-wave-and-diffusion-equations-fails-for-step-size-of-pi-25n-using-methodoflines-jl/106091)

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**Author:** [@NonDairyNeutrino](https://discourse.julialang.org/u/NonDairyNeutrino)\
**Replies:** 6\
**Last updated:** [September 22, 2025, 5:53pm UTC](https://discourse.julialang.org/t/discretization-of-semi-coupled-wave-and-diffusion-equations-fails-for-step-size-of-pi-25n-using-methodoflines-jl/106091 "2025-09-22T17:53:04Z")

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Intro I’m using a semi-coupled system of wave and diffusion equations to simulate a string whose mass/speed of sound diffuses (as a toy to familiarize myself with MethodOfLines.jl for my master’s thesis in high-performan…

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## [Min max Ipopt opti : error in step computation](https://discourse.julialang.org/t/min-max-ipopt-opti-error-in-step-computation/132429)

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**Author:** [@baroqueuse](https://discourse.julialang.org/u/baroqueuse)\
**Replies:** 6\
**Last updated:** [September 22, 2025, 12:40pm UTC](https://discourse.julialang.org/t/min-max-ipopt-opti-error-in-step-computation/132429 "2025-09-22T12:40:06Z")

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Hello everybody. I want to solve a min max problem with Ipopt solver. I used the trick described in JuMP documentation (section tips and tricks). I managed to write my problem but the optimization do not work. I hade t…

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## [Compact form of a set of constraints](https://discourse.julialang.org/t/compact-form-of-a-set-of-constraints/129220)

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**Author:** [@rocco\_sprmnt21](https://discourse.julialang.org/u/rocco_sprmnt21)\
**Replies:** 9\
**Last updated:** [September 21, 2025, 9:31pm UTC](https://discourse.julialang.org/t/compact-form-of-a-set-of-constraints/129220 "2025-09-21T21:31:31Z")

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I have the following script that works for the case N=4. using JuMP import HiGHS m = Model(HiGHS.Optimizer); @variable(m, x\[1:4,1:8\], Bin) @variable(m, y\[1:4,1:6\], Bin) @constraints(m, begin \[j in 1:8\], sum(x\[r,j\]…

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## [Hybrid MCMC Algorithm](https://discourse.julialang.org/t/hybrid-mcmc-algorithm/132400)

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**Author:** [@jackmarry](https://discourse.julialang.org/u/jackmarry)\
**Replies:** 2\
**Last updated:** [September 21, 2025, 5:04pm UTC](https://discourse.julialang.org/t/hybrid-mcmc-algorithm/132400 "2025-09-21T17:04:25Z")

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I saw the steps for a Bayesian estimation algorithm in a paper, and I was wondering if there’s a way to implement this kind of hybrid MCMC algorithm using the Turing.jl library.

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## [Proper Makie.jl recipe usage](https://discourse.julialang.org/t/proper-makie-jl-recipe-usage/132502)

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**Author:** [@langestefan](https://discourse.julialang.org/u/langestefan)\
**Replies:** 7\
**Last updated:** [September 21, 2025, 12:11pm UTC](https://discourse.julialang.org/t/proper-makie-jl-recipe-usage/132502 "2025-09-21T12:11:36Z")

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This is the first time I am writing a recipe and I am a bit lost in all the options. Basically I want to have a few convenient plotting functions for a package I am working on. It calculates solar positions, which are ju…

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## [Hexahedron volume plot](https://discourse.julialang.org/t/hexahedron-volume-plot/131489)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 6\
**Last updated:** [September 21, 2025, 11:49am UTC](https://discourse.julialang.org/t/hexahedron-volume-plot/131489 "2025-09-21T11:49:26Z")

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How to volume plot a Hexahedron :ice: for colors given at each vertices? using Meshes, CoordRefSystems ,GLMakie, LinearAlgebra, Unitful r = Float32\[1.6, 1.754088, 1.9230156, 2.1082115, 2.311243, 2.5338273, 2.7778475, …

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## [\[GSoC 2025\] Supporting Patient-Level Pipelines within JuliaHealth](https://discourse.julialang.org/t/gsoc-2025-supporting-patient-level-pipelines-within-juliahealth/132534)

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**Author:** [@kosuri-indu](https://discourse.julialang.org/u/kosuri-indu)\
**Replies:** 0\
**Last updated:** [September 21, 2025, 8:29am UTC](https://discourse.julialang.org/t/gsoc-2025-supporting-patient-level-pipelines-within-juliahealth/132534 "2025-09-21T08:29:10Z")

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Hello Julia Community! :waving\_hand: I’m thrilled to share a major milestone: I’ve officially completed my Google Summer Of Code 2025 project with JuliaHealth! This summer, I had the incredible opportunity to improve to…

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## [Changing struct fields to a different sub-type during run time](https://discourse.julialang.org/t/changing-struct-fields-to-a-different-sub-type-during-run-time/132346)

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**Author:** [@stevenhughes](https://discourse.julialang.org/u/stevenhughes)\
**Replies:** 19\
**Last updated:** [September 20, 2025, 6:06pm UTC](https://discourse.julialang.org/t/changing-struct-fields-to-a-different-sub-type-during-run-time/132346 "2025-09-20T18:06:27Z")

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Hello everyone, I am working on an aerospace system and as I am developing more complex use cases, I need to change fields on structs to a new type during a simulation. For example, when a spacecraft leaves the Earth s…

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## [RCCL wrapping](https://discourse.julialang.org/t/rccl-wrapping/132287)

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**Author:** [@fran94](https://discourse.julialang.org/u/fran94)\
**Replies:** 4\
**Last updated:** [September 20, 2025, 12:32pm UTC](https://discourse.julialang.org/t/rccl-wrapping/132287 "2025-09-20T12:32:28Z")

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Hi! I’m trying to wrap the Radeon collective communication library (RCCL), the ROCm counterpart to NCCL. I’m taking heavy inspiration from NCCL.jl regarding wrapping strategy since RCCL itself closely mimics NCCL. I hav…

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