# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=141

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**Page:** 142

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## [Guide to numerical integration methods?](https://discourse.julialang.org/t/guide-to-numerical-integration-methods/108704)

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**Author:** [@mike.ingold](https://discourse.julialang.org/u/mike.ingold)\
**Replies:** 10\
**Last updated:** [January 16, 2024, 11:03pm UTC](https://discourse.julialang.org/t/guide-to-numerical-integration-methods/108704 "2024-01-16T23:03:20Z")

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To pile on with a related question, as a EE without a particularly deep math background, @stevengj do you have any handy references for the different integration methods and their advantages/pitfalls? I find myself writ…

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## [Chain.jl error](https://discourse.julialang.org/t/chain-jl-error/75970)

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**Author:** [@Rahul](https://discourse.julialang.org/u/Rahul)\
**Replies:** 4\
**Last updated:** [January 16, 2024, 8:11pm UTC](https://discourse.julialang.org/t/chain-jl-error/75970 "2024-01-16T20:11:42Z")

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@chain throws an error that I cannot understand. Please help. Thanks! Code and error below: julia\> a = DataFrame(x=1:10, y=2:11) 10×2 DataFrame Row │ x y │ Int64 Int64 ─────┼────────────── 1 │ …

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## [GLMakie Box(f\[1,1\]) hides Axis3 content](https://discourse.julialang.org/t/glmakie-box-f-1-1-hides-axis3-content/108868)

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**Author:** [@p\_f](https://discourse.julialang.org/u/p_f)\
**Replies:** 5\
**Last updated:** [January 16, 2024, 5:21pm UTC](https://discourse.julialang.org/t/glmakie-box-f-1-1-hides-axis3-content/108868 "2024-01-16T17:21:12Z")

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I’m using the Box function with different colours to differentiate between panels in my figure. The issue I’m having is that the Box hides the Axis3 lines and the axis contents. Is there a known way around this? I do re…

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## [Plots with formatted DateTime xticks?](https://discourse.julialang.org/t/plots-with-formatted-datetime-xticks/48649)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 3\
**Last updated:** [January 16, 2024, 7:05am UTC](https://discourse.julialang.org/t/plots-with-formatted-datetime-xticks/48649 "2024-01-16T07:05:09Z")

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I need to plot some data with DateTime type along the abscissa, and would like to have a nice formatting of the xtick argument. Consider this example: using Plots, Dates # function timeperiod(x::Float64) Second(Int…

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## [Is there any julia package for multivariate polynomial regression?](https://discourse.julialang.org/t/is-there-any-julia-package-for-multivariate-polynomial-regression/108785)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 18\
**Last updated:** [January 16, 2024, 2:34am UTC](https://discourse.julialang.org/t/is-there-any-julia-package-for-multivariate-polynomial-regression/108785 "2024-01-16T02:34:33Z")

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For example, I want to build a multivariate polynomial model for data \\{x\_{1i},x\_{2i},\\cdots,x\_{mi},y\_i\\}\_{i=1}^N with given degree n. Thanks for your attention!

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## [Are there any packages for finite volume simulations?](https://discourse.julialang.org/t/are-there-any-packages-for-finite-volume-simulations/108802)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 9\
**Last updated:** [January 15, 2024, 10:13pm UTC](https://discourse.julialang.org/t/are-there-any-packages-for-finite-volume-simulations/108802 "2024-01-15T22:13:53Z")

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I know finite element simulations well, but I am new to the field of finite volume simulations. See: Finite volume method - Wikipedia A comparison between finite element and finite volume methods: FEM vs. FVM | COMSOL B…

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## [Axis tick label position in GeoMakie](https://discourse.julialang.org/t/axis-tick-label-position-in-geomakie/106588)

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**Author:** [@Gravlax](https://discourse.julialang.org/u/Gravlax)\
**Replies:** 1\
**Last updated:** [January 15, 2024, 4:51pm UTC](https://discourse.julialang.org/t/axis-tick-label-position-in-geomakie/106588 "2024-01-15T16:51:48Z")

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I am currently trying out GeoMakie. I have an issue with axis tick labels appearing on the axis or inside the figure. Is there an a simple way to simply shift all x position of y ticks and all y position of x tick or do…

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## [Is there a comprehensive molecular dynamics analysis library in Julia?](https://discourse.julialang.org/t/is-there-a-comprehensive-molecular-dynamics-analysis-library-in-julia/108817)

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**Author:** [@Sam\_Xu](https://discourse.julialang.org/u/Sam_Xu)\
**Replies:** 2\
**Last updated:** [January 15, 2024, 1:43pm UTC](https://discourse.julialang.org/t/is-there-a-comprehensive-molecular-dynamics-analysis-library-in-julia/108817 "2024-01-15T13:43:57Z")

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There was a discussion about this topic 4 years before: What is the best molecular dynamics analysis library in Julia?. After going through the libraries mentioned in that post, it seems like BioStructures.jl and Chemfi…

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## [Getting HiGHs to return when objective value doesn't move](https://discourse.julialang.org/t/getting-highs-to-return-when-objective-value-doesnt-move/103990)

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**Author:** [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Replies:** 7\
**Last updated:** [January 15, 2024, 12:42pm UTC](https://discourse.julialang.org/t/getting-highs-to-return-when-objective-value-doesnt-move/103990 "2024-01-15T12:42:02Z")

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I’m trying to solve a constrained optimization problem with JuMP and HiGHs (this is for an open source package so I want to rely on an open source solver), but for some reason the optimization never terminates although t…

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## [Struggling with layouting Makie plots](https://discourse.julialang.org/t/struggling-with-layouting-makie-plots/108690)

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**Author:** [@p\_f](https://discourse.julialang.org/u/p_f)\
**Replies:** 4\
**Last updated:** [January 15, 2024, 11:01am UTC](https://discourse.julialang.org/t/struggling-with-layouting-makie-plots/108690 "2024-01-15T11:01:00Z")

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Apologies, this is a very similar question to one I asked yesterday, but a bit different. Apologies as well if the answer is in the docs, but I’m struggling to find it. I’ve been playing around with various combinations …

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## [Is it possible to set the attribute of optimizer in the iteration of \_solve\_in\_sequence in Lexicographic?](https://discourse.julialang.org/t/is-it-possible-to-set-the-attribute-of-optimizer-in-the-iteration-of-solve-in-sequence-in-lexicographic/108793)

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**Author:** [@Hongliang\_Yang](https://discourse.julialang.org/u/Hongliang_Yang)\
**Replies:** 5\
**Last updated:** [January 15, 2024, 7:00am UTC](https://discourse.julialang.org/t/is-it-possible-to-set-the-attribute-of-optimizer-in-the-iteration-of-solve-in-sequence-in-lexicographic/108793 "2024-01-15T07:00:00Z")

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For the following code using JuMP import HiGHS import MultiObjectiveAlgorithms as MOA model = JuMP.Model(() -\> MOA.Optimizer(HiGHS.Optimizer)) set\_attribute(model, MOA.Algorithm(), MOA.Lexicographic()) Is it possible…

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## [\[Images.jl\] Projective Transform based on Matrix](https://discourse.julialang.org/t/images-jl-projective-transform-based-on-matrix/108559)

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**Author:** [@lgmendes](https://discourse.julialang.org/u/lgmendes)\
**Replies:** 2\
**Last updated:** [January 15, 2024, 6:43am UTC](https://discourse.julialang.org/t/images-jl-projective-transform-based-on-matrix/108559 "2024-01-15T06:43:18Z")

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How I can apply an Projective Transform (or an Affine) to a image based on a transform matrix ? In phyton I can do this using: tform = transform.ProjectiveTransform(matrix=matrix) An example in Python (from Documentat…

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## [How to make a Pair Plot in Plots.jl?](https://discourse.julialang.org/t/how-to-make-a-pair-plot-in-plots-jl/53785)

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**Author:** [@TheCedarPrince](https://discourse.julialang.org/u/TheCedarPrince)\
**Replies:** 5\
**Last updated:** [January 14, 2024, 11:19pm UTC](https://discourse.julialang.org/t/how-to-make-a-pair-plot-in-plots-jl/53785 "2024-01-14T23:19:38Z")

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Hey everyone, I feel like I am totally overthinking this but am running into a wall. I was able to make a pairplot using some code from a Makie discussion here. I have been trying to do the same thing using Plots.jl. In…

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## [Plot sol of differentialequation](https://discourse.julialang.org/t/plot-sol-of-differentialequation/108768)

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**Author:** [@Stephen](https://discourse.julialang.org/u/Stephen)\
**Replies:** 3\
**Last updated:** [January 14, 2024, 4:58am UTC](https://discourse.julialang.org/t/plot-sol-of-differentialequation/108768 "2024-01-14T04:58:34Z")

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using Plots, DifferentialEquations function projectile\_motion(v₀, θ) g = 9.8067 # acceleration due to gravity (m/s^2) t\_final = 2 \* v₀ \* sind(θ) / g # total flight time # Define the system of second-or…

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## [Sparse Spike Deconvolution: how to perform a cross validation using JuMP?](https://discourse.julialang.org/t/sparse-spike-deconvolution-how-to-perform-a-cross-validation-using-jump/108776)

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**Author:** [@Matheus](https://discourse.julialang.org/u/Matheus)\
**Replies:** 4\
**Last updated:** [January 13, 2024, 11:38pm UTC](https://discourse.julialang.org/t/sparse-spike-deconvolution-how-to-perform-a-cross-validation-using-jump/108776 "2024-01-13T23:38:59Z")

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I’m basically trying to minimize the following matrix equation Z(the data) and c are vectors while G and A are matrices. G is a matrix that receives a scalar parameter P. To create the model, I’ve set a fix P and tri…

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## [How to plot a cube in 3D in Plots.jl](https://discourse.julialang.org/t/how-to-plot-a-cube-in-3d-in-plots-jl/86919)

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**Author:** [@chelseas](https://discourse.julialang.org/u/chelseas)\
**Replies:** 10\
**Last updated:** [January 13, 2024, 8:56am UTC](https://discourse.julialang.org/t/how-to-plot-a-cube-in-3d-in-plots-jl/86919 "2024-01-13T08:56:32Z")

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I would like to plot a 3D cube in Plots.jl and I have not been able to. I know that there are solutions in Makie but I would like to use the Plots.jl interface because I want to combine this with other things plotted wi…

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## [Is it possible to diagonalize matrices with M-series Apple Silicon GPUs?](https://discourse.julialang.org/t/is-it-possible-to-diagonalize-matrices-with-m-series-apple-silicon-gpus/106075)

<div class="topic-metadata">

**Author:** [@mdyuki](https://discourse.julialang.org/u/mdyuki)\
**Replies:** 10\
**Last updated:** [January 12, 2024, 3:39pm UTC](https://discourse.julialang.org/t/is-it-possible-to-diagonalize-matrices-with-m-series-apple-silicon-gpus/106075 "2024-01-12T15:39:22Z")

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Hello. I have to diagonalize Hermtian matrices with large (e.g. 10k X 10k) dimensions for many times. To reduce computing time, I am considering using GPUs. Since I have a Mac mini with M1 chip now, I would like to try …

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## [Setting \`pt\_per\_unit\` in GLMakie for animation](https://discourse.julialang.org/t/setting-pt-per-unit-in-glmakie-for-animation/107063)

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**Author:** [@yhchang96](https://discourse.julialang.org/u/yhchang96)\
**Replies:** 3\
**Last updated:** [January 12, 2024, 2:27pm UTC](https://discourse.julialang.org/t/setting-pt-per-unit-in-glmakie-for-animation/107063 "2024-01-12T14:27:16Z")

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With the recent update to GLMakie, I know we can set set pt\_per\_unit while saving figure created by GLMakie. What about animation? I make my animation with something like the following: t\_idx = Observable(1) fig = Figu…

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## [ModelingToolkit.jl and type-based equation deciding: best practices?](https://discourse.julialang.org/t/modelingtoolkit-jl-and-type-based-equation-deciding-best-practices/107491)

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**Author:** [@Datseris](https://discourse.julialang.org/u/Datseris)\
**Replies:** 3\
**Last updated:** [January 12, 2024, 11:13am UTC](https://discourse.julialang.org/t/modelingtoolkit-jl-and-type-based-equation-deciding-best-practices/107491 "2024-01-12T11:13:33Z")

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What do people recommend for ModelingToolkit.jl with variable equations that change depending on some input “type” specification? By that I mean that I have some sort of physical process that has a couple of different wa…

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## [Save plot as .tex file](https://discourse.julialang.org/t/save-plot-as-tex-file/108691)

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**Author:** [@flobe](https://discourse.julialang.org/u/flobe)\
**Replies:** 6\
**Last updated:** [January 12, 2024, 9:31am UTC](https://discourse.julialang.org/t/save-plot-as-tex-file/108691 "2024-01-12T09:31:08Z")

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Hi all, I’m trying to export my plot in Julia as a pgf plot. So basically I want a .tex file with the data, the header, etc. automatically generated from the plot. However I’m not sure how to do it correctly. Currently …

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## [Nested optimisation problem in JuMP](https://discourse.julialang.org/t/nested-optimisation-problem-in-jump/107409)

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**Author:** [@dbro](https://discourse.julialang.org/u/dbro)\
**Replies:** 6\
**Last updated:** [January 12, 2024, 7:17am UTC](https://discourse.julialang.org/t/nested-optimisation-problem-in-jump/107409 "2024-01-12T07:17:29Z")

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I am working on a multi-objective optimisation problem involving a collection of demand nodes supplied by a collection of source nodes. The aim is to explore a range of different potential networks and their ability to m…

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## [Some eigenpairs from a large, sparse, nonsymmetric matrix: Julia vs Matlab](https://discourse.julialang.org/t/some-eigenpairs-from-a-large-sparse-nonsymmetric-matrix-julia-vs-matlab/93742)

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**Author:** [@PeterSimon](https://discourse.julialang.org/u/PeterSimon)\
**Replies:** 22\
**Last updated:** [January 12, 2024, 4:18am UTC](https://discourse.julialang.org/t/some-eigenpairs-from-a-large-sparse-nonsymmetric-matrix-julia-vs-matlab/93742 "2024-01-12T04:18:21Z")

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In the course of working through a book on frequency domain finite difference solutions for electromagnetics, I have been converting the supplied Matlab programs to Julia. For the problem of determining the modes of an …

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## [Gurobi 11.0 support](https://discourse.julialang.org/t/gurobi-11-0-support/108667)

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**Author:** [@Petra123](https://discourse.julialang.org/u/Petra123)\
**Replies:** 2\
**Last updated:** [January 12, 2024, 3:31am UTC](https://discourse.julialang.org/t/gurobi-11-0-support/108667 "2024-01-12T03:31:34Z")

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Hi, I am new to Julia, and trying to set it up in my wsl environment. I want to use julia for stochastic programming, using the package StochasticPrograms.jl to be exact. I tried setting up Gurobi. I installed the laste…

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## [How to filter geojson files?](https://discourse.julialang.org/t/how-to-filter-geojson-files/108599)

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**Author:** [@math4mad](https://discourse.julialang.org/u/math4mad)\
**Replies:** 1\
**Last updated:** [January 12, 2024, 2:08am UTC](https://discourse.julialang.org/t/how-to-filter-geojson-files/108599 "2024-01-12T02:08:34Z")

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I just want to try GeoMakie.jl package follow this page: csv :economic-growth map:geojson gdp.csv file include 173 countries and region , but geojson include 255 feature how to alignment data ? how to fill …

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## [Loopless calculations](https://discourse.julialang.org/t/loopless-calculations/108628)

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**Author:** [@SergeantMike](https://discourse.julialang.org/u/SergeantMike)\
**Replies:** 12\
**Last updated:** [January 11, 2024, 11:27pm UTC](https://discourse.julialang.org/t/loopless-calculations/108628 "2024-01-11T23:27:28Z")

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As an Ecologist, I have a hard time wrapping my head around some of the more esoteric mathematical voo-doo that Julia does, and by that I mean pretty much anything more complicated than x+y=z. With that said, here’s wha…

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## [Optimizating computational time of gradient on big linear UDEs](https://discourse.julialang.org/t/optimizating-computational-time-of-gradient-on-big-linear-udes/108645)

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**Author:** [@jarroyoe](https://discourse.julialang.org/u/jarroyoe)\
**Replies:** 11\
**Last updated:** [January 11, 2024, 10:28pm UTC](https://discourse.julialang.org/t/optimizating-computational-time-of-gradient-on-big-linear-udes/108645 "2024-01-11T22:28:25Z")

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I have an high-dimensional UDE model that includes a linear model. A MWE of the linear component of the model is: using ForwardDiff, DifferentialEquations, SciMLSensitivity trainingData = rand(100,4) p0 = rand(100,100)…

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## [Quadratures and cubatures with Dirac deltas](https://discourse.julialang.org/t/quadratures-and-cubatures-with-dirac-deltas/108683)

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**Author:** [@homocomputeris](https://discourse.julialang.org/u/homocomputeris)\
**Replies:** 11\
**Last updated:** [January 11, 2024, 6:46pm UTC](https://discourse.julialang.org/t/quadratures-and-cubatures-with-dirac-deltas/108683 "2024-01-11T18:46:46Z")

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Are there ways to compute cubatures of functions that include the Dirac delta function?

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## [CURAND no longer makes CU Array for Complex Numbers](https://discourse.julialang.org/t/curand-no-longer-makes-cu-array-for-complex-numbers/108602)

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**Author:** [@Allan\_Baker](https://discourse.julialang.org/u/Allan_Baker)\
**Replies:** 6\
**Last updated:** [January 11, 2024, 5:13pm UTC](https://discourse.julialang.org/t/curand-no-longer-makes-cu-array-for-complex-numbers/108602 "2024-01-11T17:13:33Z")

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I feel I am doing something wrong. I’m not an expert in this GPU coding, so I was happy when I got this working maybe a year or two ago. I’m revisiting this code and it has stopped working. I have a vector of complex …

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## [Learning rate decay in callback function](https://discourse.julialang.org/t/learning-rate-decay-in-callback-function/107859)

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**Author:** [@KianH](https://discourse.julialang.org/u/KianH)\
**Replies:** 3\
**Last updated:** [January 11, 2024, 4:10pm UTC](https://discourse.julialang.org/t/learning-rate-decay-in-callback-function/107859 "2024-01-11T16:10:06Z")

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I was wondering if there is a way to access the learning rate through a callback function when using Lux.jl and Optimization.jl packages. For instance in the line below: Optimization.solve(optprob, ADAM(1e-3), callback …

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## [FFTW with @parallel seg faults](https://discourse.julialang.org/t/fftw-with-parallel-seg-faults/10590)

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**Author:** [@mzilhao](https://discourse.julialang.org/u/mzilhao)\
**Replies:** 7\
**Last updated:** [January 11, 2024, 3:47pm UTC](https://discourse.julialang.org/t/fftw-with-parallel-seg-faults/10590 "2024-01-11T15:47:05Z")

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hi all, I have a code that I’m trying to trivially parallelize with @parallel, but I’m getting a strange segmentation fault that I’ve tracked down to a call to FFTW.plan\_r2r. This is the simplest example that reproduces…

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