# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=168

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**Page:** 169

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## [Does a Sequential Modular Approach (SMA) algorithm exist for solving component-based systems of non-linear equations](https://discourse.julialang.org/t/does-a-sequential-modular-approach-sma-algorithm-exist-for-solving-component-based-systems-of-non-linear-equations/103389)

<div class="topic-metadata">

**Author:** [@chris-hampel-CA](https://discourse.julialang.org/u/chris-hampel-CA)\
**Replies:** 2\
**Last updated:** [September 1, 2023, 5:41pm UTC](https://discourse.julialang.org/t/does-a-sequential-modular-approach-sma-algorithm-exist-for-solving-component-based-systems-of-non-linear-equations/103389 "2023-09-01T17:41:17Z")

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Hello, I am polling this board to see if anyone knows if an algorithm exists in any Julia package to perform the Sequential Modular Approach (SMA) technique for solving systems of connected components where each compone…

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## [Numerical solutions of eigenvalue problems with linear constrains](https://discourse.julialang.org/t/numerical-solutions-of-eigenvalue-problems-with-linear-constrains/103325)

<div class="topic-metadata">

**Author:** [@swish47](https://discourse.julialang.org/u/swish47)\
**Replies:** 6\
**Last updated:** [September 1, 2023, 2:34pm UTC](https://discourse.julialang.org/t/numerical-solutions-of-eigenvalue-problems-with-linear-constrains/103325 "2023-09-01T14:34:35Z")

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As an example, one need to search the least or the least second eigenvalue and corresponded eigenvector of matrix A, under constraint Bx=c, where B is coefficient matrix, x is eigenvector under search, and c is a constan…

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## [Optional parameter assignment map for modelingtoolkit system with defaults](https://discourse.julialang.org/t/optional-parameter-assignment-map-for-modelingtoolkit-system-with-defaults/103437)

<div class="topic-metadata">

**Author:** [@Jon\_Norberg](https://discourse.julialang.org/u/Jon_Norberg)\
**Replies:** 6\
**Last updated:** [September 1, 2023, 2:27pm UTC](https://discourse.julialang.org/t/optional-parameter-assignment-map-for-modelingtoolkit-system-with-defaults/103437 "2023-09-01T14:27:55Z")

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Hi, how would I make the parameter map for running a modelingtoolkit system using an optional defaults approach like fun(sys::ODEsystem; p1=1,p2=0.2,p3=0.47) # Goal: end up with an assignment map that uses the defaul…

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## [Failing to start a session with webdriver.jl](https://discourse.julialang.org/t/failing-to-start-a-session-with-webdriver-jl/103445)

<div class="topic-metadata">

**Author:** [@indymnv](https://discourse.julialang.org/u/indymnv)\
**Replies:** 0\
**Last updated:** [September 1, 2023, 2:20pm UTC](https://discourse.julialang.org/t/failing-to-start-a-session-with-webdriver-jl/103445 "2023-09-01T14:20:07Z")

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I am trying to do an web scrapping excercise using webdriver.jl to control the browser, but I got some problems to starting a session in Chrome and Firefox. This is the code I am using first case: chrome with local chro…

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## [Add nested optimization problem in JuMP](https://discourse.julialang.org/t/add-nested-optimization-problem-in-jump/103378)

<div class="topic-metadata">

**Author:** [@leima0521](https://discourse.julialang.org/u/leima0521)\
**Replies:** 4\
**Last updated:** [September 1, 2023, 2:09pm UTC](https://discourse.julialang.org/t/add-nested-optimization-problem-in-jump/103378 "2023-09-01T14:09:55Z")

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I want to include an inner loop optimization (a fixed point iteration algorithm) inside my current optimization problem. I cannot figure out how to make it work… Any help/guidance/advice is truly appreciated! The curren…

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## [Instability with Gauss-Hermite quadrature](https://discourse.julialang.org/t/instability-with-gauss-hermite-quadrature/103408)

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**Author:** [@mleprovost](https://discourse.julialang.org/u/mleprovost)\
**Replies:** 0\
**Last updated:** [August 31, 2023, 2:48pm UTC](https://discourse.julialang.org/t/instability-with-gauss-hermite-quadrature/103408 "2023-08-31T14:48:10Z")

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Hello, I would like to approximate the log-density of a univariate distribution \\pi\_0 with a basis of Hermite polynomials. To compute the coefficients of the expansion, I am using the Gauss-Hermite quadrature. I am gett…

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## [Use ParallelStencil.jl with GPU](https://discourse.julialang.org/t/use-parallelstencil-jl-with-gpu/103439)

<div class="topic-metadata">

**Author:** [@chloisu](https://discourse.julialang.org/u/chloisu)\
**Replies:** 3\
**Last updated:** [September 1, 2023, 11:15am UTC](https://discourse.julialang.org/t/use-parallelstencil-jl-with-gpu/103439 "2023-09-01T11:15:12Z")

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Hello, I’m very happy to use ParallelStencil.jl. The CPU version (i.e. USE\_GPU = false) works fine. However, when I try to run the example script diffusion3D\_novis\_noperf.jl with the GPU (i.e. USE\_GPU = true), I get the…

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## [Max and min Gurobi constraint in Julia](https://discourse.julialang.org/t/max-and-min-gurobi-constraint-in-julia/103370)

<div class="topic-metadata">

**Author:** [@manoj.centura](https://discourse.julialang.org/u/manoj.centura)\
**Replies:** 2\
**Last updated:** [September 1, 2023, 10:13am UTC](https://discourse.julialang.org/t/max-and-min-gurobi-constraint-in-julia/103370 "2023-09-01T10:13:21Z")

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Hi All, MAX constraint: The constraint !\[\</span\>r = \\max\\{x\_1,\\ldots,x\_k,c\\}\<span\> MIN constraint: Similar to a MAX constraint, the constraint !\[\</span\>r = \\min\\{x\_1,\\ldots,x\_k,c\\}\<span\>\] can we code max and min cons…

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## [Regression Variance Inflation Factor (VIF)](https://discourse.julialang.org/t/regression-variance-inflation-factor-vif/60233)

<div class="topic-metadata">

**Author:** [@Storopoli](https://discourse.julialang.org/u/Storopoli)\
**Replies:** 7\
**Last updated:** [September 1, 2023, 5:54am UTC](https://discourse.julialang.org/t/regression-variance-inflation-factor-vif/60233 "2023-09-01T05:54:45Z")

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Hello, how do I check for VIF Variance inflation factor - Wikipedia in a GLM.jl lm model? I went through the JuliaStats org repositories and package documentations and could not find anything.

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## [Optimization v3.16.0 errors in precompile](https://discourse.julialang.org/t/optimization-v3-16-0-errors-in-precompile/103229)

<div class="topic-metadata">

**Author:** [@jaksaa](https://discourse.julialang.org/u/jaksaa)\
**Replies:** 3\
**Last updated:** [August 31, 2023, 8:35pm UTC](https://discourse.julialang.org/t/optimization-v3-16-0-errors-in-precompile/103229 "2023-08-31T20:35:10Z")

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Have Julia Version 1.9.2 Optimization v3.16.0 Two errors are present │ ┌ Error: Error during loading of extension OptimizationSparseFinitediffExt of Optimization, use \`Base.retry\_load\_extensions()\` to retry. and │…

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## [Is there an equivalent in Julia for the R change point detection library ecp](https://discourse.julialang.org/t/is-there-an-equivalent-in-julia-for-the-r-change-point-detection-library-ecp/103422)

<div class="topic-metadata">

**Author:** [@Vidyasagar\_Atmakuri](https://discourse.julialang.org/u/Vidyasagar_Atmakuri)\
**Replies:** 0\
**Last updated:** [August 31, 2023, 7:03pm UTC](https://discourse.julialang.org/t/is-there-an-equivalent-in-julia-for-the-r-change-point-detection-library-ecp/103422 "2023-08-31T19:03:42Z")

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I am rewriting an R based forecast model which is using the ecp library, specifically the e.divisive function for change point detection. Is there an equivalent package in Julia that I can use. https://rdrr.io/cran/ecp/…

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## [Live-streamed and recorded seminar "Julia for Materials Modelling"](https://discourse.julialang.org/t/live-streamed-and-recorded-seminar-julia-for-materials-modelling/99264)

<div class="topic-metadata">

**Author:** [@mfh](https://discourse.julialang.org/u/mfh)\
**Replies:** 2\
**Last updated:** [August 31, 2023, 1:54pm UTC](https://discourse.julialang.org/t/live-streamed-and-recorded-seminar-julia-for-materials-modelling/99264 "2023-08-31T13:54:35Z")

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Dear all I’ll do a (live-streamed) seminar “Julia for Materials Modelling” tomorrow at 3pm CEST — with basically the focus on the current state of Julia for atomistic materials modelling. See Julia for Materials Modelli…

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## [Anybody using ESDL (Energy System Modeling Language)?](https://discourse.julialang.org/t/anybody-using-esdl-energy-system-modeling-language/103405)

<div class="topic-metadata">

**Author:** [@abelsiqueira](https://discourse.julialang.org/u/abelsiqueira)\
**Replies:** 0\
**Last updated:** [August 31, 2023, 1:49pm UTC](https://discourse.julialang.org/t/anybody-using-esdl-energy-system-modeling-language/103405 "2023-08-31T13:49:27Z")

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Is anybody using the ESDL format (ESDL Documentation - ESDL, Meer Informatie)? I noticed that it is not as widespread outside of the Netherlands, but it looks very useful: ESDL is a modelling language created to descr…

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## [GLMakie: plot surface and nonlinear constraints](https://discourse.julialang.org/t/glmakie-plot-surface-and-nonlinear-constraints/62619)

<div class="topic-metadata">

**Author:** [@cvanaret](https://discourse.julialang.org/u/cvanaret)\
**Replies:** 7\
**Last updated:** [August 31, 2023, 7:16am UTC](https://discourse.julialang.org/t/glmakie-plot-surface-and-nonlinear-constraints/62619 "2023-08-31T07:16:42Z")

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Hi, I’m plotting the surface of a function (the objective function of an optimization problem) with this code: using GLMakie let # range x = LinRange(-2, 0.5, 51) y = LinRange(-2, 2, 51) # objective fun…

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## [Modeling multimodal data in Flux](https://discourse.julialang.org/t/modeling-multimodal-data-in-flux/103257)

<div class="topic-metadata">

**Author:** [@usiam](https://discourse.julialang.org/u/usiam)\
**Replies:** 3\
**Last updated:** [August 31, 2023, 12:34am UTC](https://discourse.julialang.org/t/modeling-multimodal-data-in-flux/103257 "2023-08-31T00:34:14Z")

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Hey. I am trying to model some multimodal time-series data. The data has 3 “components” - a time-series component (shape = \[timesteps, channels, batchsize\]), and 2 separate flattened components (shape = \[numfeatures, bat…

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## [Memory not released on HTTP POST requests?!](https://discourse.julialang.org/t/memory-not-released-on-http-post-requests/103336)

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**Author:** [@sschmidhuber](https://discourse.julialang.org/u/sschmidhuber)\
**Replies:** 2\
**Last updated:** [August 30, 2023, 9:51pm UTC](https://discourse.julialang.org/t/memory-not-released-on-http-post-requests/103336 "2023-08-30T21:51:07Z")

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Hello, I was trying to find a memory leak in my application, but now I think either it is in HTTP.jl or I’m doing some thing wrong… I created a test script to reproduce the issue (replace “path/to/a/large/file.iso” to …

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## [Promote on ArbFloat issue?](https://discourse.julialang.org/t/promote-on-arbfloat-issue/102839)

<div class="topic-metadata">

**Author:** [@roi.holtzman](https://discourse.julialang.org/u/roi.holtzman)\
**Replies:** 5\
**Last updated:** [August 30, 2023, 9:27pm UTC](https://discourse.julialang.org/t/promote-on-arbfloat-issue/102839 "2023-08-30T21:27:25Z")

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I am trying to make sure that all of my ArbFloats are with the same precision. I do not understand why promote works like that: a = ArbFloat(2, digits=200) typeof(a) # ArbFloat{691} typeof.(promote(a, ArbFloat(0.0))) #…

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## [Printing exact decimal representations](https://discourse.julialang.org/t/printing-exact-decimal-representations/103365)

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**Author:** [@simonbyrne](https://discourse.julialang.org/u/simonbyrne)\
**Replies:** 2\
**Last updated:** [August 30, 2023, 12:06pm UTC](https://discourse.julialang.org/t/printing-exact-decimal-representations/103365 "2023-08-30T12:06:36Z")

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I don’t think there is, but it would be great if there was one.

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## [DomainError with Loss is Inf on data item 1, stopping training:](https://discourse.julialang.org/t/domainerror-with-loss-is-inf-on-data-item-1-stopping-training/103343)

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**Author:** [@chadagreene](https://discourse.julialang.org/u/chadagreene)\
**Replies:** 1\
**Last updated:** [August 30, 2023, 11:22am UTC](https://discourse.julialang.org/t/domainerror-with-loss-is-inf-on-data-item-1-stopping-training/103343 "2023-08-30T11:22:19Z")

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I’m trying to learn Julia and ML principles simultaneously. I’ve successfully trained a model to fit a simple straight line, following the procedure described in the intro docs, but when I try to go a step further and ad…

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## [Are vectorized constraints no longer supported on JuMP?](https://discourse.julialang.org/t/are-vectorized-constraints-no-longer-supported-on-jump/103355)

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**Author:** [@AS011996](https://discourse.julialang.org/u/AS011996)\
**Replies:** 1\
**Last updated:** [August 30, 2023, 8:03am UTC](https://discourse.julialang.org/t/are-vectorized-constraints-no-longer-supported-on-jump/103355 "2023-08-30T08:03:52Z")

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The vectorized constraints on Constraints · JuMP no longer seems to work. The following code using JuMP model = Model(); @variable(model, x\[i=1:2\]) A = \[1 2; 3 4\] b = \[5, 6\] @constraint(model, con\_vector, A \* x == b)…

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## [Combinatorial Benders cuts](https://discourse.julialang.org/t/combinatorial-benders-cuts/103012)

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**Author:** [@papar](https://discourse.julialang.org/u/papar)\
**Replies:** 7\
**Last updated:** [August 30, 2023, 2:56am UTC](https://discourse.julialang.org/t/combinatorial-benders-cuts/103012 "2023-08-30T02:56:17Z")

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I have a big-M constraint in a stochastic programming problem that I want to replace with combinatorial Benders cuts. I have tried implementing combinatorial Bender decomposition, but I get unbounded problem error when i…

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## [Filled contour plots in Plots.jl without contour lines and smooth interpolation (GR backend)](https://discourse.julialang.org/t/filled-contour-plots-in-plots-jl-without-contour-lines-and-smooth-interpolation-gr-backend/34796)

<div class="topic-metadata">

**Author:** [@sloede](https://discourse.julialang.org/u/sloede)\
**Replies:** 40\
**Last updated:** [August 29, 2023, 7:28pm UTC](https://discourse.julialang.org/t/filled-contour-plots-in-plots-jl-without-contour-lines-and-smooth-interpolation-gr-backend/34796 "2023-08-29T19:28:48Z")

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Actually, these are two questions towards Plots.jl with the GR backend in one post (hope that’s ok, I think they are related): Is it possible to create a filled contour plot (using plot(linetype=:contourf, ...) withou…

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## [How to convert a Rasters.Raster{UInt8,2} to a Raster{Float32,2}?](https://discourse.julialang.org/t/how-to-convert-a-rasters-raster-uint8-2-to-a-raster-float32-2/103322)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 4\
**Last updated:** [August 29, 2023, 6:27pm UTC](https://discourse.julialang.org/t/how-to-convert-a-rasters-raster-uint8-2-to-a-raster-float32-2/103322 "2023-08-29T18:27:05Z")

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Hello, as from the title, how can I convert a Rasters.Raster{UInt8,2} to a Raster{Float32,2} ? I have tried with convert(Raster{Float64,2},myraster) but this method is not defined…

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## [Franklin.jl: deploy to server without Julia installation?](https://discourse.julialang.org/t/franklin-jl-deploy-to-server-without-julia-installation/103334)

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**Author:** [@greatpet](https://discourse.julialang.org/u/greatpet)\
**Replies:** 1\
**Last updated:** [August 29, 2023, 3:37pm UTC](https://discourse.julialang.org/t/franklin-jl-deploy-to-server-without-julia-installation/103334 "2023-08-29T15:37:07Z")

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Can I generate the \_\_site directory holding the webpage content on my laptop, and then copy the whole directory to a remote server which has no Julia installation? Do I just need to adjust absolute paths appearing in the…

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## [Images -- is it possible to change selected colors?](https://discourse.julialang.org/t/images-is-it-possible-to-change-selected-colors/103263)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 7\
**Last updated:** [August 29, 2023, 3:24pm UTC](https://discourse.julialang.org/t/images-is-it-possible-to-change-selected-colors/103263 "2023-08-29T15:24:09Z")

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Thanks for great presentation of Images.jl at JuliaCon 2023. I haven’t really used the package (I’m not doing much work on images), but I see that I can import raw files from several camera brands. Nice. I’m curious abo…

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## [Semi-static website framework?](https://discourse.julialang.org/t/semi-static-website-framework/103232)

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**Author:** [@nev](https://discourse.julialang.org/u/nev)\
**Replies:** 4\
**Last updated:** [August 29, 2023, 2:50pm UTC](https://discourse.julialang.org/t/semi-static-website-framework/103232 "2023-08-29T14:50:07Z")

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Hello, I am writing a blog website in Julia. I want it to be an essentially static Markdown website, but with support for authentication and dynamically generated web pages. Because of this, existing static website gene…

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## [Solving Poisson PDE in an arbitrary 2D geometry, under different types of both internal and external boundary conditions](https://discourse.julialang.org/t/solving-poisson-pde-in-an-arbitrary-2d-geometry-under-different-types-of-both-internal-and-external-boundary-conditions/103130)

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**Author:** [@Zeljko](https://discourse.julialang.org/u/Zeljko)\
**Replies:** 6\
**Last updated:** [August 29, 2023, 1:10pm UTC](https://discourse.julialang.org/t/solving-poisson-pde-in-an-arbitrary-2d-geometry-under-different-types-of-both-internal-and-external-boundary-conditions/103130 "2023-08-29T13:10:21Z")

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Fairly new to Julia, and I am trying to solve a 2D PDE problem of the form: with finite differences where the 2D domain may not necessarily be a pure rectangle (e.g., a cross-like shape, or rectangle with internal rec…

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## [How to add plot icon displayed in legend to axis label?](https://discourse.julialang.org/t/how-to-add-plot-icon-displayed-in-legend-to-axis-label/103299)

<div class="topic-metadata">

**Author:** [@yhchang96](https://discourse.julialang.org/u/yhchang96)\
**Replies:** 2\
**Last updated:** [August 28, 2023, 7:54pm UTC](https://discourse.julialang.org/t/how-to-add-plot-icon-displayed-in-legend-to-axis-label/103299 "2023-08-28T19:54:49Z")

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Is it possible to extract the icon (line, marker, etc) displayed in a typical Legend so that I can display them in ax.xlabel and ax.ylabel? Edit: The left plot is what we usually get by using Legend (or axislegend). I …

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## [What are the t-tests in the GLM.jl's models?](https://discourse.julialang.org/t/what-are-the-t-tests-in-the-glm-jls-models/103261)

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**Author:** [@bertulli](https://discourse.julialang.org/u/bertulli)\
**Replies:** 7\
**Last updated:** [August 28, 2023, 7:38pm UTC](https://discourse.julialang.org/t/what-are-the-t-tests-in-the-glm-jls-models/103261 "2023-08-28T19:38:53Z")

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Hi all, I’m not sure about the meaning of the pretty prints of GLM.jl’s models: julia\> model StatsModels.TableRegressionModel{LinearModel{GLM.LmResp{Vector{Float64}}, GLM.DensePredChol{Float64, LinearAlgebra.CholeskyPiv…

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## [GLMakie & Observables: Cannot update screen when observable holds reference to struct field](https://discourse.julialang.org/t/glmakie-observables-cannot-update-screen-when-observable-holds-reference-to-struct-field/102364)

<div class="topic-metadata">

**Author:** [@f.ij](https://discourse.julialang.org/u/f.ij)\
**Replies:** 20\
**Last updated:** [August 28, 2023, 10:52am UTC](https://discourse.julialang.org/t/glmakie-observables-cannot-update-screen-when-observable-holds-reference-to-struct-field/102364 "2023-08-28T10:52:37Z")

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I’m working on a simulation and was using QML before, but since it is not well maintained, I was looking into using GLMakie. I have this code snippet where I update data in a matrix from a thread, and visualize it using…

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