# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=129

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**Page:** 130

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## [Reset Solver in Julia](https://discourse.julialang.org/t/reset-solver-in-julia/63756)

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**Author:** [@Micah\_Mungal](https://discourse.julialang.org/u/Micah_Mungal)\
**Replies:** 8\
**Last updated:** [March 4, 2024, 8:27pm UTC](https://discourse.julialang.org/t/reset-solver-in-julia/63756 "2024-03-04T20:27:22Z")

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I am trying to do a sensitivity analysis study using Julia and Gurobi as the solver. In doing the sensitivity analysis simulation, I am changing the coefficient of one of the optimization variables, building the model an…

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## [How do I tune a pipeline in MLJ?](https://discourse.julialang.org/t/how-do-i-tune-a-pipeline-in-mlj/111155)

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**Author:** [@ablaom](https://discourse.julialang.org/u/ablaom)\
**Replies:** 1\
**Last updated:** [March 4, 2024, 8:08pm UTC](https://discourse.julialang.org/t/how-do-i-tune-a-pipeline-in-mlj/111155 "2024-03-04T20:08:00Z")

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A slack user has asked the question in the title. More generally, how does one tune hyperparameters that are nested in composed model? One obtains composed models, for example, when applying Stack, EnsembleModel, Iterat…

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## [Disaggregate Yearly Transitiolabouror market to weekly transitions](https://discourse.julialang.org/t/disaggregate-yearly-transitiolabouror-market-to-weekly-transitions/111154)

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**Author:** [@mkhdermani](https://discourse.julialang.org/u/mkhdermani)\
**Replies:** 0\
**Last updated:** [March 4, 2024, 7:53pm UTC](https://discourse.julialang.org/t/disaggregate-yearly-transitiolabouror-market-to-weekly-transitions/111154 "2024-03-04T19:53:36Z")

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Currently, I am in the process of transitioning to a labour market that is yearly, and I would like to move it to weekly data. What should I do in this situation?

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## [\[ANN\] DataFramesMeta.jl v 0.15.0 Release](https://discourse.julialang.org/t/ann-dataframesmeta-jl-v-0-15-0-release/111144)

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**Author:** [@pdeffebach](https://discourse.julialang.org/u/pdeffebach)\
**Replies:** 0\
**Last updated:** [March 4, 2024, 6:24pm UTC](https://discourse.julialang.org/t/ann-dataframesmeta-jl-v-0-15-0-release/111144 "2024-03-04T18:24:12Z")

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DataFramesMeta 0.15.0 Announcement I’m happy to announce the version 0.15.0 release of DataFramesmeta.jl! We’ve added three new features that users wil like. Multi-column selection in @select The @groupby macro for ea…

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## [Tinycorelinux](https://discourse.julialang.org/t/tinycorelinux/111134)

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**Author:** [@johnh](https://discourse.julialang.org/u/johnh)\
**Replies:** 1\
**Last updated:** [March 4, 2024, 2:36pm UTC](https://discourse.julialang.org/t/tinycorelinux/111134 "2024-03-04T14:36:24Z")

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See Tiny Core Linux 15 stuffs modern computing in a nutshell • The Register There is often interest in running Lulia on embedded systems or systems with low resources. I guess Julia would work on this small resource di…

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## [Difference between OrdinaryDiffEq.jl and DifferentialEquations.jl](https://discourse.julialang.org/t/difference-between-ordinarydiffeq-jl-and-differentialequations-jl/111133)

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**Author:** [@Sushrut\_Deshpande](https://discourse.julialang.org/u/Sushrut_Deshpande)\
**Replies:** 1\
**Last updated:** [March 4, 2024, 1:49pm UTC](https://discourse.julialang.org/t/difference-between-ordinarydiffeq-jl-and-differentialequations-jl/111133 "2024-03-04T13:49:57Z")

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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)

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**Author:** [@TheLateKronos](https://discourse.julialang.org/u/TheLateKronos)\
**Replies:** 5\
**Last updated:** [March 4, 2024, 1:42pm UTC](https://discourse.julialang.org/t/makie-get-data-from-figure/96053 "2024-03-04T13:42:33Z")

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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)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 3\
**Last updated:** [March 4, 2024, 1:08pm UTC](https://discourse.julialang.org/t/modelingtoolkit-news/111126 "2024-03-04T13:08:17Z")

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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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## [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)

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**Author:** [@ehgus](https://discourse.julialang.org/u/ehgus)\
**Replies:** 0\
**Last updated:** [March 4, 2024, 12:33pm UTC](https://discourse.julialang.org/t/a-tip-for-integrating-your-new-format-without-changing-fileio-s-registry/111129 "2024-03-04T12:33:08Z")

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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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## [Garbage collection not triggering on SLURM cluster](https://discourse.julialang.org/t/garbage-collection-not-triggering-on-slurm-cluster/95675)

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**Author:** [@HKaras](https://discourse.julialang.org/u/HKaras)\
**Replies:** 6\
**Last updated:** [March 4, 2024, 12:14pm UTC](https://discourse.julialang.org/t/garbage-collection-not-triggering-on-slurm-cluster/95675 "2024-03-04T12:14:19Z")

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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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## [Picking an AD Backend and Enzyme Errors](https://discourse.julialang.org/t/picking-an-ad-backend-and-enzyme-errors/111075)

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**Author:** [@kiranshila](https://discourse.julialang.org/u/kiranshila)\
**Replies:** 8\
**Last updated:** [March 3, 2024, 10:24pm UTC](https://discourse.julialang.org/t/picking-an-ad-backend-and-enzyme-errors/111075 "2024-03-03T22:24:29Z")

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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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## [DiffEqGPU - slow parallel solving of SDEs on GPU](https://discourse.julialang.org/t/diffeqgpu-slow-parallel-solving-of-sdes-on-gpu/110814)

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**Author:** [@sob](https://discourse.julialang.org/u/sob)\
**Replies:** 6\
**Last updated:** [March 3, 2024, 4:10pm UTC](https://discourse.julialang.org/t/diffeqgpu-slow-parallel-solving-of-sdes-on-gpu/110814 "2024-03-03T16:10:11Z")

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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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## [JuMP + Alpine: Handling scalar functions with vector input using @NLexpression](https://discourse.julialang.org/t/jump-alpine-handling-scalar-functions-with-vector-input-using-nlexpression/111019)

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**Author:** [@smallpondtom](https://discourse.julialang.org/u/smallpondtom)\
**Replies:** 5\
**Last updated:** [March 2, 2024, 11:13pm UTC](https://discourse.julialang.org/t/jump-alpine-handling-scalar-functions-with-vector-input-using-nlexpression/111019 "2024-03-02T23:13:20Z")

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Hi everyone, I am trying to reproduce this optimization below using JuMP. I’ve written a function below to solve this optimization. function LEDOA(V::Function, V\_dot::Function, N::Int) model = Model(Ipopt.Optim…

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## [Smoothing surface in GLMakie](https://discourse.julialang.org/t/smoothing-surface-in-glmakie/110957)

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**Author:** [@Alicanter](https://discourse.julialang.org/u/Alicanter)\
**Replies:** 7\
**Last updated:** [March 2, 2024, 12:12pm UTC](https://discourse.julialang.org/t/smoothing-surface-in-glmakie/110957 "2024-03-02T12:12:55Z")

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I have data from a simulation (test.csv.gz) and I am trying to plot it as a surface. The equations have a singularity at a certain threshold, so there is a cutoff in the values of the surface. The problem I am facing i…

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## [No method matching error](https://discourse.julialang.org/t/no-method-matching-error/111044)

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**Author:** [@IgorESMelo](https://discourse.julialang.org/u/IgorESMelo)\
**Replies:** 2\
**Last updated:** [March 2, 2024, 8:30am UTC](https://discourse.julialang.org/t/no-method-matching-error/111044 "2024-03-02T08:30:55Z")

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Hello everyone, I’m trying to build a mathematical model to minimize the variance of 4 variables. However, when I try to compute the variance julia have returned the follow error: ERROR: MethodError: no method matching…

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## [How to link observables with ODE to make interactive plot?](https://discourse.julialang.org/t/how-to-link-observables-with-ode-to-make-interactive-plot/111043)

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**Author:** [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Replies:** 1\
**Last updated:** [March 2, 2024, 8:01am UTC](https://discourse.julialang.org/t/how-to-link-observables-with-ode-to-make-interactive-plot/111043 "2024-03-02T08:01:57Z")

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I would like to make an interactive plot of a SIV model using GLMakie. But how can I link GLMakie with DifferentialEquations? The latter requires parameters that are passed to the solver and these parameters are made of …

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## [Seasonal plot is not smooth -- where am I going wrong?](https://discourse.julialang.org/t/seasonal-plot-is-not-smooth-where-am-i-going-wrong/111042)

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**Author:** [@GeodeticR](https://discourse.julialang.org/u/GeodeticR)\
**Replies:** 0\
**Last updated:** [March 2, 2024, 6:09am UTC](https://discourse.julialang.org/t/seasonal-plot-is-not-smooth-where-am-i-going-wrong/111042 "2024-03-02T06:09:56Z")

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Howdy friends, I am attempting to plot the seasonal variability within the GPS data so that, in the future, I am able to have a de-trended/residual plot of GPS positions. Shown here is only the vertical component of a …

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## [MPI.jl + Zygote OOM on embarrassingly parallel tasks](https://discourse.julialang.org/t/mpi-jl-zygote-oom-on-embarrassingly-parallel-tasks/110622)

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**Author:** [@richardr2926](https://discourse.julialang.org/u/richardr2926)\
**Replies:** 11\
**Last updated:** [March 1, 2024, 11:29pm UTC](https://discourse.julialang.org/t/mpi-jl-zygote-oom-on-embarrassingly-parallel-tasks/110622 "2024-03-01T23:29:16Z")

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We have simple NN: using MPI using Zygote using CUDA using Flux using LinearAlgebra MPI.Init() comm = MPI.COMM\_WORLD rank = MPI.Comm\_rank(comm) size = MPI.Comm\_size(comm) nx, ny, nz, nt = parse.(Int, ARGS\[1:4\]) T = F…

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## [Different time scales in ODE system](https://discourse.julialang.org/t/different-time-scales-in-ode-system/111030)

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**Author:** [@Nick1](https://discourse.julialang.org/u/Nick1)\
**Replies:** 1\
**Last updated:** [March 1, 2024, 9:08pm UTC](https://discourse.julialang.org/t/different-time-scales-in-ode-system/111030 "2024-03-01T21:08:57Z")

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Hi everyone, I have an ODE system that involves reactions that happen in different time scales (minutes and seconds). I know I can convert all the ODEs to seconds but I am curious if there is a way to tackle different t…

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## [CairoMakie Legend Line Too Short](https://discourse.julialang.org/t/cairomakie-legend-line-too-short/110990)

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**Author:** [@TI36XPro](https://discourse.julialang.org/u/TI36XPro)\
**Replies:** 6\
**Last updated:** [March 1, 2024, 5:11pm UTC](https://discourse.julialang.org/t/cairomakie-legend-line-too-short/110990 "2024-03-01T17:11:57Z")

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Hello, I am trying to determine how I can increase the line thickness of the lines in the legend. Please consider the following MWE and resulting image. The lines in the legend are too short and it is hard to tell whic…

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## [Progress in End-to-End Optimization of Detectors for Fundamental Physics with Differentiable Programming](https://discourse.julialang.org/t/progress-in-end-to-end-optimization-of-detectors-for-fundamental-physics-with-differentiable-programming/111024)

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**Author:** [@johnh](https://discourse.julialang.org/u/johnh)\
**Replies:** 0\
**Last updated:** [March 1, 2024, 4:41pm UTC](https://discourse.julialang.org/t/progress-in-end-to-end-optimization-of-detectors-for-fundamental-physics-with-differentiable-programming/111024 "2024-03-01T16:41:42Z")

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This looks to be a very interesting paper https://lss.fnal.gov/archive/2023/pub/fermilab-pub-23-608-csaid-ppd.pdf In this article we examine recent developments in the research area concerning the creation of end-to-e…

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## [Turing.jl - Create priors dynamically](https://discourse.julialang.org/t/turing-jl-create-priors-dynamically/110587)

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**Author:** [@Rafalel\_Jupio](https://discourse.julialang.org/u/Rafalel_Jupio)\
**Replies:** 2\
**Last updated:** [March 1, 2024, 3:22pm UTC](https://discourse.julialang.org/t/turing-jl-create-priors-dynamically/110587 "2024-03-01T15:22:34Z")

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Hello everyone, So in the problem I am currently working on, my parameter space changes a lot, meaning the number of parameters I want to make inference on (using Bayesian statistics, through the Turing.jl package) is n…

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## [How to make a vector of observables in GLMakie](https://discourse.julialang.org/t/how-to-make-a-vector-of-observables-in-glmakie/111012)

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**Author:** [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Replies:** 2\
**Last updated:** [March 1, 2024, 2:22pm UTC](https://discourse.julialang.org/t/how-to-make-a-vector-of-observables-in-glmakie/111012 "2024-03-01T14:22:00Z")

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I am trying to make an interactive plot of a SIV model using GLMakie. I have created the parameters as observable. I now need to make the parameters to pass to the solver. One is u0 that stores the initial values of the …

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## [Survival analysis in Julia](https://discourse.julialang.org/t/survival-analysis-in-julia/969)

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**Author:** [@piever](https://discourse.julialang.org/u/piever)\
**Replies:** 22\
**Last updated:** [March 1, 2024, 12:33pm UTC](https://discourse.julialang.org/t/survival-analysis-in-julia/969 "2024-03-01T12:33:11Z")

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Hi all, What are good packages for survival analysis in Julia (i.e. working with truncated data, Kaplan-Meier estimator, Cox model and so on…)? So far I only found packages that seemed incomplete/abandoned (e.g.\[https:/…

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## [BARON - ERROR: IOError: could not spawn](https://discourse.julialang.org/t/baron-error-ioerror-could-not-spawn/44430)

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**Author:** [@trathi](https://discourse.julialang.org/u/trathi)\
**Replies:** 16\
**Last updated:** [March 1, 2024, 8:05am UTC](https://discourse.julialang.org/t/baron-error-ioerror-could-not-spawn/44430 "2024-03-01T08:05:59Z")

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I am solving a non-linear optimization problem using BARON. The BARON.jl package version I am using is 0.6.2 and it seems to be working fine. But after I update the package to 0.6.3 or 0.6.4, following error is displayed…

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## [PolyesterForwardDiff - backend choice is not available](https://discourse.julialang.org/t/polyesterforwarddiff-backend-choice-is-not-available/110985)

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**Author:** [@sob](https://discourse.julialang.org/u/sob)\
**Replies:** 4\
**Last updated:** [March 1, 2024, 1:25am UTC](https://discourse.julialang.org/t/polyesterforwarddiff-backend-choice-is-not-available/110985 "2024-03-01T01:25:57Z")

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Hi everybody, I’m trying to use PolyesterForwardDiff in my code but stumbling upon an error for which the MWE is inspired by the doc: julia\> using Optimization, OptimizationOptimJL, ForwardDiff, PolyesterForwardDiff j…

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## [LinearAlgebra help](https://discourse.julialang.org/t/linearalgebra-help/110964)

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**Author:** [@tushargayan2324](https://discourse.julialang.org/u/tushargayan2324)\
**Replies:** 4\
**Last updated:** [February 29, 2024, 6:23pm UTC](https://discourse.julialang.org/t/linearalgebra-help/110964 "2024-02-29T18:23:36Z")

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I am trying to solve a certain question; Question: There is a 2-d square grid of nodes, with resistors placed randomly to connect those nodes. And eventually, those connections may extend from one end to the other end. …

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## [Multi-threads error (undefRefError) in simple ABM with Agents.jl](https://discourse.julialang.org/t/multi-threads-error-undefreferror-in-simple-abm-with-agents-jl/110900)

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**Author:** [@elisadonati23](https://discourse.julialang.org/u/elisadonati23)\
**Replies:** 21\
**Last updated:** [February 29, 2024, 8:57pm UTC](https://discourse.julialang.org/t/multi-threads-error-undefreferror-in-simple-abm-with-agents-jl/110900 "2024-02-29T20:57:26Z")

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Dear all, I am working on an ABM and now I am trying to improve performance through in-model parallelization using @threads since I have 10^6 agents (I am working with fish populations and simulation is in 0D for now, I …

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## [What is the best way to introduce multiple variables in column generation scheme?](https://discourse.julialang.org/t/what-is-the-best-way-to-introduce-multiple-variables-in-column-generation-scheme/110963)

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**Author:** [@lucasximenes](https://discourse.julialang.org/u/lucasximenes)\
**Replies:** 3\
**Last updated:** [February 29, 2024, 8:09pm UTC](https://discourse.julialang.org/t/what-is-the-best-way-to-introduce-multiple-variables-in-column-generation-scheme/110963 "2024-02-29T20:09:56Z")

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Hello! I was wondering what is the optimal way to introduce a group of new variables into an existing variable container, and then update their values in the objective function. My main concern is that my current implem…

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## [Change ylabel after twinx is generated?](https://discourse.julialang.org/t/change-ylabel-after-twinx-is-generated/110969)

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**Author:** [@Iddingsite](https://discourse.julialang.org/u/Iddingsite)\
**Replies:** 1\
**Last updated:** [February 29, 2024, 6:20pm UTC](https://discourse.julialang.org/t/change-ylabel-after-twinx-is-generated/110969 "2024-02-29T18:20:09Z")

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Hey everyone, I would like to know if it is possible to change only one label name of a simple plot containing a twin axis using Plots. Of course I know that you can do that when calling twinx, but for one of my use, I …

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