# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md

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

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## [About the Specific Domains category](https://discourse.julialang.org/t/about-the-specific-domains-category/86)

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**Author:** [@StefanKarpinski](https://discourse.julialang.org/u/StefanKarpinski)\
**Replies:** 5\
**Last updated:** [November 8, 2016, 10:43pm UTC](https://discourse.julialang.org/t/about-the-specific-domains-category/86 "2016-11-08T22:43:04Z")

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Discussion of Julia in various specialized subject domains that have a dedicated community. Don’t see your domain? Fear not, post your topic in general usage.

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## [First ever BioJulia community call - Poll](https://discourse.julialang.org/t/first-ever-biojulia-community-call-poll/139645)

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**Author:** [@kevbonham](https://discourse.julialang.org/u/kevbonham)\
**Replies:** 1\
**Last updated:** [September 28, 2026, 4:03pm UTC](https://discourse.julialang.org/t/first-ever-biojulia-community-call-poll/139645 "2026-09-28T16:03:22Z")

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Hello everyone, as discussed at JuliaCon, @jakobnissen and I are planning to host periodic (roughly quarterly) community calls for folks interested in biology, bioinformatics, and related ecosystems, please take this pol…

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## [Julia Images adaptive histogram equalization vs MATLAB's implementation](https://discourse.julialang.org/t/julia-images-adaptive-histogram-equalization-vs-matlabs-implementation/119469)

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**Author:** [@cpaniaguam](https://discourse.julialang.org/u/cpaniaguam)\
**Replies:** 2\
**Last updated:** [September 28, 2026, 3:02pm UTC](https://discourse.julialang.org/t/julia-images-adaptive-histogram-equalization-vs-matlabs-implementation/119469 "2026-09-28T15:02:36Z")

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I’m hoping to get an expert’s opinion on this matter. In MATLAB: \>\> img = imread('cameraman.tif'); \>\> class(img) ans = 'uint8' \>\> sum(img(:)) ans = 7780728 \>\> img\_eq = adapthisteq(img, Range="original", …

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## [Anyone crazy enough to develop a pure Julia GUI toolbox?](https://discourse.julialang.org/t/anyone-crazy-enough-to-develop-a-pure-julia-gui-toolbox/74002)

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**Author:** [@SergeantMike67](https://discourse.julialang.org/u/SergeantMike67)\
**Replies:** 208\
**Last updated:** [September 27, 2026, 12:47am UTC](https://discourse.julialang.org/t/anyone-crazy-enough-to-develop-a-pure-julia-gui-toolbox/74002 "2026-09-27T00:47:01Z")

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I clearly have had way too much time on my hands lately because I have begun to investigate developing a gui toolbox and widgets similar to GTK or Qt only written in pure Julia. My reasons for this are: that for the li…

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## [Makie - Your question here](https://discourse.julialang.org/t/makie-your-question-here/139670)

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**Author:** [@aasdelat](https://discourse.julialang.org/u/aasdelat)\
**Replies:** 1\
**Last updated:** [September 25, 2026, 10:06pm UTC](https://discourse.julialang.org/t/makie-your-question-here/139670 "2026-09-25T22:06:33Z")

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I want to develop a Makie application that can be started as a web page or as a desktop application. The main script is agnostic as to it is in a web page or in a desktop apllication. In the first case, a scrip using WGL…

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## [Solving ModelingToolkit models with EnsembleGPUArray](https://discourse.julialang.org/t/solving-modelingtoolkit-models-with-ensemblegpuarray/139647)

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**Author:** [@hochbean](https://discourse.julialang.org/u/hochbean)\
**Replies:** 4\
**Last updated:** [September 25, 2026, 12:19pm UTC](https://discourse.julialang.org/t/solving-modelingtoolkit-models-with-ensemblegpuarray/139647 "2026-09-25T12:19:34Z")

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Hi everyone, I’m running an ensemble of small (2–6 state) stiff/DAE thermal RC-network models (ModelingToolkit-built, many independent “buildings” of the same model structure with their own physical parameters) and tryi…

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## [Will Reactant.jl become a machine learning framework?](https://discourse.julialang.org/t/will-reactant-jl-become-a-machine-learning-framework/125478)

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**Author:** [@Tarny\_GG\_Channie](https://discourse.julialang.org/u/Tarny_GG_Channie)\
**Replies:** 17\
**Last updated:** [September 24, 2026, 7:05pm UTC](https://discourse.julialang.org/t/will-reactant-jl-become-a-machine-learning-framework/125478 "2026-09-24T19:05:50Z")

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I made an observation that MLIR + Enzyme could form quite a capable ML framework, and then, well… like the last time I theorized about how a good language would work, and Julians were one step ahead of me, creating Julia…

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## [Using FunSQL.jl with Postgres.jl](https://discourse.julialang.org/t/using-funsql-jl-with-postgres-jl/139564)

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**Author:** [@Jake](https://discourse.julialang.org/u/Jake)\
**Replies:** 1\
**Last updated:** [September 24, 2026, 4:45pm UTC](https://discourse.julialang.org/t/using-funsql-jl-with-postgres-jl/139564 "2026-09-24T16:45:07Z")

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I am testing Postgres.jl with my package that currently uses LibPQ and FunSQL. The testing so far which did not include FunSQL worked well. I am getting stuck on the FunSQL integration. LibPQ.jl does not support the D…

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## [Understanding jump model preparation cost](https://discourse.julialang.org/t/understanding-jump-model-preparation-cost/138472)

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**Author:** [@lmshk](https://discourse.julialang.org/u/lmshk)\
**Replies:** 19\
**Last updated:** [September 23, 2026, 1:32pm UTC](https://discourse.julialang.org/t/understanding-jump-model-preparation-cost/138472 "2026-09-23T13:32:43Z")

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I am using Catalyst.jl to make JumpProblems of around 160k species and a fairly sparse interaction structure that includes what JumpProcesses.jl calls “constant-rate jump” (CRJ) reactions. This works, but JumpProblem con…

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## [Seismic imaging with Julia and CUDA.jl](https://discourse.julialang.org/t/seismic-imaging-with-julia-and-cuda-jl/139609)

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**Author:** [@aalquwayfili](https://discourse.julialang.org/u/aalquwayfili)\
**Replies:** 0\
**Last updated:** [September 22, 2026, 4:05pm UTC](https://discourse.julialang.org/t/seismic-imaging-with-julia-and-cuda-jl/139609 "2026-09-22T16:05:45Z")

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Hey everyone, I’ve been experimenting with seismic imaging in Julia and CUDA.jl. I built a 2D model that sends waves through rock layers, records the echoes, and reconstructs the layer boundary using reverse-time migrati…

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## [Change z order/index in Plots.jl](https://discourse.julialang.org/t/change-z-order-index-in-plots-jl/47250)

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**Author:** [@OvidiusCicero](https://discourse.julialang.org/u/OvidiusCicero)\
**Replies:** 12\
**Last updated:** [September 21, 2026, 9:50am UTC](https://discourse.julialang.org/t/change-z-order-index-in-plots-jl/47250 "2026-09-21T09:50:37Z")

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Is there a way to change the order in which plots are drawn in Plots.jl? (z index or z order in other suites) For example plot(rand(5)) // unfilled plot!(2rand(5); fill=0) // filled I would like to show unfi…

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## [Find area and perimeters of labeled segments for binary image](https://discourse.julialang.org/t/find-area-and-perimeters-of-labeled-segments-for-binary-image/124552)

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**Author:** [@Alex\_Milns](https://discourse.julialang.org/u/Alex_Milns)\
**Replies:** 3\
**Last updated:** [September 19, 2026, 2:11am UTC](https://discourse.julialang.org/t/find-area-and-perimeters-of-labeled-segments-for-binary-image/124552 "2026-09-19T02:11:29Z")

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Hi! I try to calculate area and perimeters of labeled regions of binary image. For example: using Images, ImageView, ImageSegmentation, TestImages, IndirectArrays, ImageMorphology img = testimage("blobs") # f = Adaptive…

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## [Introducing me and my first Julia package SiCell.jl](https://discourse.julialang.org/t/introducing-me-and-my-first-julia-package-sicell-jl/137720)

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**Author:** [@Sizerta](https://discourse.julialang.org/u/Sizerta)\
**Replies:** 7\
**Last updated:** [September 18, 2026, 8:41pm UTC](https://discourse.julialang.org/t/introducing-me-and-my-first-julia-package-sicell-jl/137720 "2026-09-18T20:41:43Z")

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Hi everyone :waving\_hand: My name is Masoud, and I’m excited to finally share my first Julia package with the community: SiCell.jl. SiCell is a high-performance single-cell RNA-seq toolkit I’ve been working on for the …

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## [Flux train! no longer works](https://discourse.julialang.org/t/flux-train-no-longer-works/139543)

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**Author:** [@MathJulia](https://discourse.julialang.org/u/MathJulia)\
**Replies:** 1\
**Last updated:** [September 18, 2026, 5:41pm UTC](https://discourse.julialang.org/t/flux-train-no-longer-works/139543 "2026-09-18T17:41:08Z")

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I have a neural network which has two parts. one encoder and the other main network. Due to recent changes in Flux.jl API, my code no longer works. I keep some of weights of main network and train them beside encoder. ho…

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## [Write CSV row by row](https://discourse.julialang.org/t/write-csv-row-by-row/138171)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 8\
**Last updated:** [September 17, 2026, 6:15pm UTC](https://discourse.julialang.org/t/write-csv-row-by-row/138171 "2026-09-17T18:15:14Z")

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I have a computation that calculates rows of data, let’s say they are NamedTuples with the same keys. I would like to emit this into a CSV file without collecting or making it an iterable. ▶ Why? Pseudocode for what I wa…

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## [Parsequoted=true in JSON.jl](https://discourse.julialang.org/t/parsequoted-true-in-json-jl/139486)

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**Author:** [@freeman](https://discourse.julialang.org/u/freeman)\
**Replies:** 4\
**Last updated:** [September 17, 2026, 2:22pm UTC](https://discourse.julialang.org/t/parsequoted-true-in-json-jl/139486 "2026-09-17T14:22:13Z")

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JSON3 had the ability to automatically handle quoted numbers. For example import JSON3 struct MyType x::Float64 end s = "{\\"x\\":\\"4.0\\"}" # note quoted "4.0" JSON3.read(s, MyType; parsequoted=true) # MyType(4.0…

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## [Package technical spec feedback](https://discourse.julialang.org/t/package-technical-spec-feedback/139056)

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**Author:** [@mthelm85](https://discourse.julialang.org/u/mthelm85)\
**Replies:** 1\
**Last updated:** [September 16, 2026, 2:18pm UTC](https://discourse.julialang.org/t/package-technical-spec-feedback/139056 "2026-09-16T14:18:48Z")

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About 6 months ago, I threw together a quick & dirty (unregistered) package that I called DataMimic for generating synthetic data, based on a real dataset. It was okay for what I needed it for at the time, but it’s defin…

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## [Play video and sound](https://discourse.julialang.org/t/play-video-and-sound/6498)

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**Author:** [@yakir12](https://discourse.julialang.org/u/yakir12)\
**Replies:** 9\
**Last updated:** [September 15, 2026, 8:23pm UTC](https://discourse.julialang.org/t/play-video-and-sound/6498 "2026-09-15T20:23:33Z")

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Is there a way we can play a video and its sound currently in Julia? The excellent VideoIO.jl package doesn’t play sound.

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## [ODS from Video using Optical Flow](https://discourse.julialang.org/t/ods-from-video-using-optical-flow/139488)

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**Author:** [@Jake](https://discourse.julialang.org/u/Jake)\
**Replies:** 0\
**Last updated:** [September 15, 2026, 7:55pm UTC](https://discourse.julialang.org/t/ods-from-video-using-optical-flow/139488 "2026-09-15T19:55:25Z")

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The video ODS (Operating Deflection Shape) used by Vibrant using the same Farneback algorithm as used in the ImageTracking.jl package, if I understand rightly. A cursory look at ImageTracking.jl shows it does the optica…

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## [Deprecating EzXML.jl?](https://discourse.julialang.org/t/deprecating-ezxml-jl/137622)

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**Author:** [@nhz2](https://discourse.julialang.org/u/nhz2)\
**Replies:** 3\
**Last updated:** [September 15, 2026, 8:57am UTC](https://discourse.julialang.org/t/deprecating-ezxml-jl/137622 "2026-09-15T08:57:49Z")

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EzXML.jl has a number of serious bugs. For example: Segfault when using \`link!\` · Issue #218 · JuliaIO/EzXML.jl · GitHub Is anyone currently maintaining this package? Should we mark this package as deprecated in the re…

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## [In my JuMP model, the LP file preserves the original variable names, but the MPS file appears to rename them, so how can I map the Gurobi .sol solution back to the original JuMP variables?](https://discourse.julialang.org/t/in-my-jump-model-the-lp-file-preserves-the-original-variable-names-but-the-mps-file-appears-to-rename-them-so-how-can-i-map-the-gurobi-sol-solution-back-to-the-original-jump-variables/139462)

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**Author:** [@amit\_97](https://discourse.julialang.org/u/amit_97)\
**Replies:** 2\
**Last updated:** [September 14, 2026, 10:19pm UTC](https://discourse.julialang.org/t/in-my-jump-model-the-lp-file-preserves-the-original-variable-names-but-the-mps-file-appears-to-rename-them-so-how-can-i-map-the-gurobi-sol-solution-back-to-the-original-jump-variables/139462 "2026-09-14T22:19:23Z")

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Hi everyone, I’m generating both .lp and .mps files from the same JuMP model using Gurobi. In the LP file, the original JuMP variable names are preserved, for example: 1200 x2\[1,(1,\_0)\] - 41054.62117964038 B2\[1,(1,\_0)…

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## [ReactantServer.jl: serve more models per GPU with Reactant.jl and XLA (gauging interest)](https://discourse.julialang.org/t/reactantserver-jl-serve-more-models-per-gpu-with-reactant-jl-and-xla-gauging-interest/137358)

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**Author:** [@csvance](https://discourse.julialang.org/u/csvance)\
**Replies:** 17\
**Last updated:** [September 13, 2026, 8:27pm UTC](https://discourse.julialang.org/t/reactantserver-jl-serve-more-models-per-gpu-with-reactant-jl-and-xla-gauging-interest/137358 "2026-09-13T20:27:02Z")

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I have been building a Julia inference server and want to find out whether others would find it useful before investing more in polishing it for general use. Feedback, criticism, and “we already have this, it is called X…

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## [How to compose discrete-time static and dynamic models for systems simulation similar to Simulink?](https://discourse.julialang.org/t/how-to-compose-discrete-time-static-and-dynamic-models-for-systems-simulation-similar-to-simulink/74858)

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**Author:** [@JanKap](https://discourse.julialang.org/u/JanKap)\
**Replies:** 9\
**Last updated:** [September 11, 2026, 6:19pm UTC](https://discourse.julialang.org/t/how-to-compose-discrete-time-static-and-dynamic-models-for-systems-simulation-similar-to-simulink/74858 "2026-09-11T18:19:36Z")

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Hi all, I’m searching for a Simulink replacement. The main purpose is to have a simplified system simulation for quick prototyping. The domain is mechanical/electrical Usually, I have 4 kinds of models/subsystems Sen…

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## [Mixing time-discrete and time-continuous systems in a simulation](https://discourse.julialang.org/t/mixing-time-discrete-and-time-continuous-systems-in-a-simulation/74277)

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**Author:** [@tqml](https://discourse.julialang.org/u/tqml)\
**Replies:** 22\
**Last updated:** [September 11, 2026, 5:23pm UTC](https://discourse.julialang.org/t/mixing-time-discrete-and-time-continuous-systems-in-a-simulation/74277 "2026-09-11T17:23:15Z")

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Hello all! Does anyone what’s currently the best way in the Julia ecosystem to mix time-continuous and time-discrete systems in one simulation? (e.g. I want to simulate a continuous system regulated by time-discrete con…

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## ["Fixed iteration" DiffEq solvers on the GPU?](https://discourse.julialang.org/t/fixed-iteration-diffeq-solvers-on-the-gpu/139357)

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**Author:** [@jl\_enthusiast](https://discourse.julialang.org/u/jl_enthusiast)\
**Replies:** 2\
**Last updated:** [September 11, 2026, 2:37pm UTC](https://discourse.julialang.org/t/fixed-iteration-diffeq-solvers-on-the-gpu/139357 "2026-09-11T14:37:32Z")

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Hey, I am currently trying to (re)write some old hobby project into Julia (related to raytracing) and want to rely on the DiffEq solver interface, ideally inside a KernelAbstractions.jl kernel (as I am performing a lot …

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## [Pvlib for Julia?](https://discourse.julialang.org/t/pvlib-for-julia/118952)

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**Author:** [@langestefan](https://discourse.julialang.org/u/langestefan)\
**Replies:** 19\
**Last updated:** [September 10, 2026, 2:47pm UTC](https://discourse.julialang.org/t/pvlib-for-julia/118952 "2026-09-10T14:47:10Z")

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Hi, I have been happily using Julia for a year or so now after being a python user for many more years. The only thing I am really missing is a substitute for pvlib. pvlib is a popular toolbox for photovoltaic systems …

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## [JuliaBayes and Turing Ecosystem](https://discourse.julialang.org/t/juliabayes-and-turing-ecosystem/139236)

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**Author:** [@slwu89](https://discourse.julialang.org/u/slwu89)\
**Replies:** 8\
**Last updated:** [September 10, 2026, 1:35pm UTC](https://discourse.julialang.org/t/juliabayes-and-turing-ecosystem/139236 "2026-09-10T13:35:39Z")

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Hi, I’m just curious what’s the goals of the JuliaBayes · GitHub group, and it’s relationship to the existing The Turing Language · GitHub ecosystem (or other probabilistic programming efforts in Julia; I’m only aware of…

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## [The Uno (Unifying Nonlinear Optimization) solver](https://discourse.julialang.org/t/the-uno-unifying-nonlinear-optimization-solver/115883)

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**Author:** [@cvanaret](https://discourse.julialang.org/u/cvanaret)\
**Replies:** 61\
**Last updated:** [September 10, 2026, 10:08am UTC](https://discourse.julialang.org/t/the-uno-unifying-nonlinear-optimization-solver/115883 "2026-09-10T10:08:44Z")

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Dear all, For the past 6 years, I have been working (on and off, this year full time) on Uno, a modular C++ solver for nonconvex optimization. It unifies the workflows of most gradient-based iterative methods (such as S…

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## [\[ANN\] MachineLearningForecast.jl: forecasting with any MLJ regressor](https://discourse.julialang.org/t/ann-machinelearningforecast-jl-forecasting-with-any-mlj-regressor/139302)

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**Author:** [@Resul.Akay](https://discourse.julialang.org/u/Resul.Akay)\
**Replies:** 3\
**Last updated:** [September 10, 2026, 10:04am UTC](https://discourse.julialang.org/t/ann-machinelearningforecast-jl-forecasting-with-any-mlj-regressor/139302 "2026-09-10T10:04:13Z")

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MachineLearningForecast.jl: Forecasting with any MLJ regressor I’m happy to share MachineLearningForecast.jl, a package for time-series forecasting that turns any MLJ Deterministic regressor into a forecaster. EvoTrees, …

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## [Distinguishing cameras with identical names](https://discourse.julialang.org/t/distinguishing-cameras-with-identical-names/139323)

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**Author:** [@grero](https://discourse.julialang.org/u/grero)\
**Replies:** 1\
**Last updated:** [September 10, 2026, 7:32am UTC](https://discourse.julialang.org/t/distinguishing-cameras-with-identical-names/139323 "2026-09-10T07:32:58Z")

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I have two identical cameras connected to two separate USB-C ports on my MacBook Pro. How do I tell VideoIO which of them to use? julia\> get\_camera\_devices("avfoundation", "\\"\\"") 5-element Vector{String}: "Teslong Cam…

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