# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=51

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**Page:** 52

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## [Alternative to systune in Julia](https://discourse.julialang.org/t/alternative-to-systune-in-julia/126583)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 9\
**Last updated:** [March 25, 2025, 8:20am UTC](https://discourse.julialang.org/t/alternative-to-systune-in-julia/126583 "2025-03-25T08:20:31Z")

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Is there an alternative to the Matlab command systune in Julia? systune tunes fixed-structure control systems subject to both soft and hard design goals. systune can tune multiple fixed-order, fixed-structure control e…

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## [@inbounds slower](https://discourse.julialang.org/t/inbounds-slower/126634)

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**Author:** [@eldee](https://discourse.julialang.org/u/eldee)\
**Replies:** 8\
**Last updated:** [March 25, 2025, 1:52am UTC](https://discourse.julialang.org/t/inbounds-slower/126634 "2025-03-25T01:52:00Z")

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Hi, I’m encountering some situations in my GPU code where adding @inbounds increases execution time by 10%-20%. Of course it would be great if we would never need @inbounds, but on the other hand there are certainly als…

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## [I32 indexing](https://discourse.julialang.org/t/i32-indexing/126702)

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**Author:** [@MrBelette](https://discourse.julialang.org/u/MrBelette)\
**Replies:** 8\
**Last updated:** [March 24, 2025, 3:04pm UTC](https://discourse.julialang.org/t/i32-indexing/126702 "2025-03-24T15:04:46Z")

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I’m currently exploring using different precision (fp32, fp64, doublefloat) calculations in the financial domain using RTX 4090 gpus. These gpus have great fp32 performance but fp64 performance isn’t so hot due to there …

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## [Reading data with 0 row groups](https://discourse.julialang.org/t/reading-data-with-0-row-groups/127318)

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**Author:** [@phchavesmaia](https://discourse.julialang.org/u/phchavesmaia)\
**Replies:** 0\
**Last updated:** [March 24, 2025, 7:07pm UTC](https://discourse.julialang.org/t/reading-data-with-0-row-groups/127318 "2025-03-24T19:07:45Z")

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Hello everyone, I am trying to work with big data in Julia. I just exported a .parquet file/folder using python’s dask library and wanted to load it in Julia. It follows a representation of my code using Parquet2: Data…

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## [How to sample many ordered iid variables in turing](https://discourse.julialang.org/t/how-to-sample-many-ordered-iid-variables-in-turing/127205)

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**Author:** [@swsw](https://discourse.julialang.org/u/swsw)\
**Replies:** 2\
**Last updated:** [March 24, 2025, 2:34pm UTC](https://discourse.julialang.org/t/how-to-sample-many-ordered-iid-variables-in-turing/127205 "2025-03-24T14:34:56Z")

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Hi there, I’d like to sample many ordered iid varialbles but i find when the number of samples is large the efficiency gets very low. For the subsequent code it works when the number of variables is 30 or so but not whe…

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## [Floating point exceptions on the gpu](https://discourse.julialang.org/t/floating-point-exceptions-on-the-gpu/127292)

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**Author:** [@MrBelette](https://discourse.julialang.org/u/MrBelette)\
**Replies:** 1\
**Last updated:** [March 24, 2025, 8:16am UTC](https://discourse.julialang.org/t/floating-point-exceptions-on-the-gpu/127292 "2025-03-24T08:16:08Z")

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I’m wondering how people treat floating point exceptions on the gpu, such as division by zero or overflow? I’m not sure about other gpus, but I believe that Nvidia gpus don’t have hardware capability to detect IEEE fp e…

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## [Update optimization model by changing variables to coefficients](https://discourse.julialang.org/t/update-optimization-model-by-changing-variables-to-coefficients/124642)

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**Author:** [@max](https://discourse.julialang.org/u/max)\
**Replies:** 11\
**Last updated:** [March 24, 2025, 4:52am UTC](https://discourse.julialang.org/t/update-optimization-model-by-changing-variables-to-coefficients/124642 "2025-03-24T04:52:45Z")

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Hi there, :slight\_smile: I am trying to extract shadow prices out of a MIQP model. In order to do this I want to “fix” the mixed integer variables after a first solving and then extract the duals. Here’s a minimal work…

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## [Nested Benders with MIP/LP solvers](https://discourse.julialang.org/t/nested-benders-with-mip-lp-solvers/126831)

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**Author:** [@PffTahsan](https://discourse.julialang.org/u/PffTahsan)\
**Replies:** 11\
**Last updated:** [March 23, 2025, 2:13pm UTC](https://discourse.julialang.org/t/nested-benders-with-mip-lp-solvers/126831 "2025-03-23T14:13:03Z")

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I want to solve a nested optimization problem using Benders decomposition, where the first stage relies on the second stage, and the second stage relies on the third stage. The challenge is that the second stage is updat…

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## [Seemingly extension of example in SciMLOperators doesn't work](https://discourse.julialang.org/t/seemingly-extension-of-example-in-scimloperators-doesnt-work/127241)

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**Author:** [@Veenty](https://discourse.julialang.org/u/Veenty)\
**Replies:** 1\
**Last updated:** [March 23, 2025, 6:46am UTC](https://discourse.julialang.org/t/seemingly-extension-of-example-in-scimloperators-doesnt-work/127241 "2025-03-23T06:46:10Z")

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JUst following the tutorial I would like to be able to define operator L6, as follows N = 4 f = (u, p, t) -\> u .\* u M = MatrixOperator(rand(N, N)) D = DiagonalOperator(rand(N)) F = FunctionOperator(f, zeros(N), zeros(…

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## [Ipopt's "local" optimum can be very substandard](https://discourse.julialang.org/t/ipopts-local-optimum-can-be-very-substandard/127217)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 8\
**Last updated:** [March 23, 2025, 12:15am UTC](https://discourse.julialang.org/t/ipopts-local-optimum-can-be-very-substandard/127217 "2025-03-23T00:15:15Z")

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Continuing the discussion from The solution deteriorates if the domain of decisions is improperly set when using Ipopt: The title is expounded with 3 examples, where the result of the first one is completely unaccepta…

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## [Conditional exact integration in ODE solving](https://discourse.julialang.org/t/conditional-exact-integration-in-ode-solving/127267)

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**Author:** [@BdeKoning](https://discourse.julialang.org/u/BdeKoning)\
**Replies:** 2\
**Last updated:** [March 22, 2025, 6:57pm UTC](https://discourse.julialang.org/t/conditional-exact-integration-in-ode-solving/127267 "2025-03-22T18:57:53Z")

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Say in my ODE problem I have an equation like this: \\frac{\\text{d}u\_i}{\\text{d}t} = r(\\mathbf{u})A(t) Here A(t) is a known non-negative interpolation function and r(\\mathbf{u}) is what we call a ‘reduction factor’; it…

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## [Enzyme computing the Hessian(?)](https://discourse.julialang.org/t/enzyme-computing-the-hessian/127197)

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**Author:** [@miguelborrero](https://discourse.julialang.org/u/miguelborrero)\
**Replies:** 6\
**Last updated:** [March 22, 2025, 7:26am UTC](https://discourse.julialang.org/t/enzyme-computing-the-hessian/127197 "2025-03-22T07:26:07Z")

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Hi there! It seems like the (fantastic!) package Enzyme supports the computation of the Hessian times a vector but not the Hessian itself. Is this just a matter of time? or is the Hessian too expensive as to implement i…

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## [Making the clipping boundary invisible in a voronoiplot](https://discourse.julialang.org/t/making-the-clipping-boundary-invisible-in-a-voronoiplot/127233)

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**Author:** [@IvanSpirandelli](https://discourse.julialang.org/u/IvanSpirandelli)\
**Replies:** 0\
**Last updated:** [March 21, 2025, 4:13pm UTC](https://discourse.julialang.org/t/making-the-clipping-boundary-invisible-in-a-voronoiplot/127233 "2025-03-21T16:13:13Z")

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Is it possible to not draw the outlines of the circles and just the voronoiplots within the circle? I want to create a figure of an alpha complex and wanted to layer several clipped Voronoi plots to do this. Unfortun…

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## [Numeric antiderivative for a noncontinuous function using ODEProblem](https://discourse.julialang.org/t/numeric-antiderivative-for-a-noncontinuous-function-using-odeproblem/126751)

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**Author:** [@nilsbecker](https://discourse.julialang.org/u/nilsbecker)\
**Replies:** 7\
**Last updated:** [March 21, 2025, 2:10pm UTC](https://discourse.julialang.org/t/numeric-antiderivative-for-a-noncontinuous-function-using-odeproblem/126751 "2025-03-21T14:10:52Z")

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Hi, I need an indefinite integral interpolation, to be constructed once and evaluated many times. Basically, I want to solve the outer ODE \\dot f(t) = A(t) b(t), where the inner integral A(t)=\\int\_0^t a(t')dt' is to be s…

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## [Is it possible to use HiGHS multi-objective optimization from JuMP?](https://discourse.julialang.org/t/is-it-possible-to-use-highs-multi-objective-optimization-from-jump/126913)

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**Author:** [@qwedsad](https://discourse.julialang.org/u/qwedsad)\
**Replies:** 5\
**Last updated:** [March 21, 2025, 11:10am UTC](https://discourse.julialang.org/t/is-it-possible-to-use-highs-multi-objective-optimization-from-jump/126913 "2025-03-21T11:10:46Z")

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HiGHS v1.9. supports multiple objectives by either blending using weights, or performing lexicographic optimization. I couldn’t find how to implement it using JuMP. Is it yet possible or not?

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## [How to use Mosek 11 beta in JuMP](https://discourse.julialang.org/t/how-to-use-mosek-11-beta-in-jump/123821)

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**Author:** [@CaG21](https://discourse.julialang.org/u/CaG21)\
**Replies:** 4\
**Last updated:** [March 21, 2025, 7:55am UTC](https://discourse.julialang.org/t/how-to-use-mosek-11-beta-in-jump/123821 "2025-03-21T07:55:35Z")

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I’d like to use Mosek 11 beta in JuMP.jl. In order to do so, I have installed Mosek 11.0.1 binaries from the website, and created the environment variable MOSEKBINDIR to point to the bin directory of Mosek 11. Then, I tr…

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## [Timeseries power model without forecast - ACOPF](https://discourse.julialang.org/t/timeseries-power-model-without-forecast-acopf/126846)

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**Author:** [@PB-vines](https://discourse.julialang.org/u/PB-vines)\
**Replies:** 5\
**Last updated:** [March 21, 2025, 6:03am UTC](https://discourse.julialang.org/t/timeseries-power-model-without-forecast-acopf/126846 "2025-03-21T06:03:31Z")

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Hello, I have a model in PowerSystems.jl that looks like this: I just want to run an acopf and dcopf with the data I have imported - I do not want to do any forecasting. However, I cannot get past the DecisionModel(…

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## [Gradual parameter changes via callbacks](https://discourse.julialang.org/t/gradual-parameter-changes-via-callbacks/127156)

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**Author:** [@vh94](https://discourse.julialang.org/u/vh94)\
**Replies:** 3\
**Last updated:** [March 21, 2025, 5:58am UTC](https://discourse.julialang.org/t/gradual-parameter-changes-via-callbacks/127156 "2025-03-21T05:58:16Z")

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Problem I’m trying to change the parameter of a dynamical system gradually. In the documentation for the DifferentialEquations library there is an emphasis on abrupt / instantaneous change - when explaining callbacks ; …

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## ["Error building 'Mosek' " in Windows 10](https://discourse.julialang.org/t/error-building-mosek-in-windows-10/98469)

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**Author:** [@zakos22](https://discourse.julialang.org/u/zakos22)\
**Replies:** 4\
**Last updated:** [March 20, 2025, 11:14pm UTC](https://discourse.julialang.org/t/error-building-mosek-in-windows-10/98469 "2025-03-20T23:14:06Z")

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Dear All, I would deeply appreciate some help in troubleshooting why my MOSEK package installation attempts are failing. I am using Julia 1.8.5, VSCode and Windows 10 and I am trying to install Mosek.jl . While runnin…

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## [JuMP re-solving Model after equivalently reformulating objective gives different results](https://discourse.julialang.org/t/jump-re-solving-model-after-equivalently-reformulating-objective-gives-different-results/125210)

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**Author:** [@phK3](https://discourse.julialang.org/u/phK3)\
**Replies:** 2\
**Last updated:** [March 20, 2025, 11:11pm UTC](https://discourse.julialang.org/t/jump-re-solving-model-after-equivalently-reformulating-objective-gives-different-results/125210 "2025-03-20T23:11:38Z")

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Disclaimer: This is a repost/extension of this github issue. The “output variables” of my problem are the entries in some specific place of a SDP matrix (P\[1,4:5\]) in the code below). When I directly optimize an object…

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## [Feasibility cut from HiGHS and Mosek are different (Benders decomposition)](https://discourse.julialang.org/t/feasibility-cut-from-highs-and-mosek-are-different-benders-decomposition/125630)

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**Author:** [@saikrishna-nadella](https://discourse.julialang.org/u/saikrishna-nadella)\
**Replies:** 7\
**Last updated:** [March 20, 2025, 11:08pm UTC](https://discourse.julialang.org/t/feasibility-cut-from-highs-and-mosek-are-different-benders-decomposition/125630 "2025-03-20T23:08:35Z")

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Hi, I am implementing bender’s decomposition using JuMP in Julia. I am investigating generation of feasibility cuts using “dual\_objective\_value” and “reduced\_cost” of fixing constraint as detailed in JuMP documentation. …

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## [Setting maximum number of function calls in GA Metaheuristics](https://discourse.julialang.org/t/setting-maximum-number-of-function-calls-in-ga-metaheuristics/127166)

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**Author:** [@JM\_Beckers](https://discourse.julialang.org/u/JM_Beckers)\
**Replies:** 2\
**Last updated:** [March 20, 2025, 10:37pm UTC](https://discourse.julialang.org/t/setting-maximum-number-of-function-calls-in-ga-metaheuristics/127166 "2025-03-20T22:37:23Z")

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Probably a stupid question, but I cannot manage to pass the maximum number of function calls f\_calls\_limit to the optimizer since the following does not seem to have any effect using Metaheuristics function gogo() c…

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## [Recovery model Tsodyks and Markram with Sindy DataDrivenDiffEq.jl](https://discourse.julialang.org/t/recovery-model-tsodyks-and-markram-with-sindy-datadrivendiffeq-jl/127144)

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**Author:** [@Sergey\_Novak](https://discourse.julialang.org/u/Sergey_Novak)\
**Replies:** 2\
**Last updated:** [March 20, 2025, 2:40pm UTC](https://discourse.julialang.org/t/recovery-model-tsodyks-and-markram-with-sindy-datadrivendiffeq-jl/127144 "2025-03-20T14:40:08Z")

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Hello, is it possible to reconstruct the Tsodyks and Markram model using SINDY? If so, how do you correctly define candidates and what to do with such a nonlinearity as a function g (E, x, u, J, I0) = α \* log (1.0 + exp …

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## [Unable to use AMDGPU.jl on RX6600](https://discourse.julialang.org/t/unable-to-use-amdgpu-jl-on-rx6600/126889)

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**Author:** [@bpsomu](https://discourse.julialang.org/u/bpsomu)\
**Replies:** 13\
**Last updated:** [March 19, 2025, 10:40pm UTC](https://discourse.julialang.org/t/unable-to-use-amdgpu-jl-on-rx6600/126889 "2025-03-19T22:40:15Z")

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I am trying to use AMDGPU.jl but it installs with several errors and does not work. Operating Systems: Fedora and Endeavor OS Julia version: 1.11.4 installed via the curl command on the Julia website julia\> using AMDG…

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## [Reactant cannot find GPU device](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124)

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**Author:** [@Tomas\_Pevny](https://discourse.julialang.org/u/Tomas_Pevny)\
**Replies:** 2\
**Last updated:** [March 19, 2025, 8:09pm UTC](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124 "2025-03-19T20:09:02Z")

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I have an old server with two GPUs (TITAN Xp, and RTX 2080). I am using that mostly for developing an playing. Now, I wanted to compare the speed of Lux with CUDA and with Reactant, but the reactant library cannot find …

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## [PrettyTables.jl + Makie.jl](https://discourse.julialang.org/t/prettytables-jl-makie-jl/66707)

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**Author:** [@bicepjai](https://discourse.julialang.org/u/bicepjai)\
**Replies:** 7\
**Last updated:** [March 19, 2025, 5:13pm UTC](https://discourse.julialang.org/t/prettytables-jl-makie-jl/66707 "2025-03-19T17:13:18Z")

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Will it be possible to insert https://github.com/ronisbr/PrettyTables.jl on an axis ?

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## [Help -- can't get Turing to work on a simple model](https://discourse.julialang.org/t/help-cant-get-turing-to-work-on-a-simple-model/122107)

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**Author:** [@anprasad](https://discourse.julialang.org/u/anprasad)\
**Replies:** 6\
**Last updated:** [March 19, 2025, 2:50pm UTC](https://discourse.julialang.org/t/help-cant-get-turing-to-work-on-a-simple-model/122107 "2025-03-19T14:50:34Z")

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Hi everyone, I’m new to Bayesian inference and Turing, so I realize that this is likely user error more than anything. I’m trying to fit a simple model; I’ve tried two versions here @model function model1(samples) …

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## [DAEProblem and ModelingToolkit.jl](https://discourse.julialang.org/t/daeproblem-and-modelingtoolkit-jl/127097)

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**Author:** [@Bart\_van\_de\_Lint](https://discourse.julialang.org/u/Bart_van_de_Lint)\
**Replies:** 4\
**Last updated:** [March 19, 2025, 11:56am UTC](https://discourse.julialang.org/t/daeproblem-and-modelingtoolkit-jl/127097 "2025-03-19T11:56:31Z")

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I am a bit confused: should we use DAEProblem(sys, du0, u0, tspan) or ODEProblem(sys, u0, tspan) from a differential-algebraic system using ModelingToolkit? Using ODEProblem does work in my case, but then I cannot use DA…

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## [Using filter in Poisson solver](https://discourse.julialang.org/t/using-filter-in-poisson-solver/127129)

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**Author:** [@Sagar\_123](https://discourse.julialang.org/u/Sagar_123)\
**Replies:** 0\
**Last updated:** [March 19, 2025, 10:05am UTC](https://discourse.julialang.org/t/using-filter-in-poisson-solver/127129 "2025-03-19T10:05:36Z")

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Hello! I am trying to implement a filter on poisson solver matrix for periodic grid. So, I have x and y grid where y is periodic, hence I can decouple in y using fft. Now, if I were to apply a filter around a particular …

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## [Turing.jl + Enyzme Examples](https://discourse.julialang.org/t/turing-jl-enyzme-examples/121606)

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**Author:** [@joshualeond](https://discourse.julialang.org/u/joshualeond)\
**Replies:** 4\
**Last updated:** [March 19, 2025, 9:48am UTC](https://discourse.julialang.org/t/turing-jl-enyzme-examples/121606 "2025-03-19T09:48:19Z")

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Hi there, are there any working examples of using Turing.jl with the Enzyme.jl AD backend? I’ve seen several Github issues like this one but I think they may be outdated at this point. Also the following Discourse topic…

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