# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=135

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**Page:** 136

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## [Finding the rank of an augmented matrix](https://discourse.julialang.org/t/finding-the-rank-of-an-augmented-matrix/109988)

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**Author:** [@AwesomeQuest](https://discourse.julialang.org/u/AwesomeQuest)\
**Replies:** 2\
**Last updated:** [February 9, 2024, 4:09pm UTC](https://discourse.julialang.org/t/finding-the-rank-of-an-augmented-matrix/109988 "2024-02-09T16:09:29Z")

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I want to determine if a system of equations has no solutions. According to Wikipedia a system of equations has no solutions if its augmented matrix has higher rank than its coefficient matrix. In Julia the natural way…

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## [Columns and Constraints generation](https://discourse.julialang.org/t/columns-and-constraints-generation/103813)

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**Author:** [@Salma](https://discourse.julialang.org/u/Salma)\
**Replies:** 13\
**Last updated:** [February 9, 2024, 1:16pm UTC](https://discourse.julialang.org/t/columns-and-constraints-generation/103813 "2024-02-09T13:16:40Z")

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Hello, I’m looking to implement two-stage robust optimization using column and constraint generation. I’ve encountered an issue within while loop related to the optimize!() function when trying to implement the algorithm…

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## [Nan values when adding constraint to inversion](https://discourse.julialang.org/t/nan-values-when-adding-constraint-to-inversion/109922)

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**Author:** [@vivekag7](https://discourse.julialang.org/u/vivekag7)\
**Replies:** 2\
**Last updated:** [February 8, 2024, 11:20pm UTC](https://discourse.julialang.org/t/nan-values-when-adding-constraint-to-inversion/109922 "2024-02-08T23:20:29Z")

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Hi Julia community, I have been trying to add a constraint to my inversion process: using Optimization, Optim, OptimizationOptimJL # Objective function function objfun(x, simulation, realsol) simulation.mo…

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## [JuMP: it is possible to obtain the description of solver parameters without accessing the official documentation directly?](https://discourse.julialang.org/t/jump-it-is-possible-to-obtain-the-description-of-solver-parameters-without-accessing-the-official-documentation-directly/109935)

<div class="topic-metadata">

**Author:** [@Alex\_73](https://discourse.julialang.org/u/Alex_73)\
**Replies:** 2\
**Last updated:** [February 8, 2024, 7:02pm UTC](https://discourse.julialang.org/t/jump-it-is-possible-to-obtain-the-description-of-solver-parameters-without-accessing-the-official-documentation-directly/109935 "2024-02-08T19:02:51Z")

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Hi, I’m new to the JuMP package. I took a look at the documentation (JuMP · JuMP) and I couldn’t identify if there is a way to access the description of the solver parameters via JuMP. For example, I would like to know …

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## [Method Error: No method Matching ZeroTangent()](https://discourse.julialang.org/t/method-error-no-method-matching-zerotangent/109913)

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**Author:** [@bdas123](https://discourse.julialang.org/u/bdas123)\
**Replies:** 1\
**Last updated:** [February 8, 2024, 4:27pm UTC](https://discourse.julialang.org/t/method-error-no-method-matching-zerotangent/109913 "2024-02-08T16:27:34Z")

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Here is the dummy Python code that is calling the Julia script (julia.jl) import julia julia.install() from julia.api import Julia julia.install jl = Julia(compiled\_modules=False) from julia import Main import numpy as…

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## [Fillstyle not supported with Plots.PlotlyBackend()](https://discourse.julialang.org/t/fillstyle-not-supported-with-plots-plotlybackend/109932)

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**Author:** [@hannaekfa](https://discourse.julialang.org/u/hannaekfa)\
**Replies:** 1\
**Last updated:** [February 8, 2024, 4:07pm UTC](https://discourse.julialang.org/t/fillstyle-not-supported-with-plots-plotlybackend/109932 "2024-02-08T16:07:44Z")

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Hi! I am trying to create a fillranged plot using the plotly backend with a fillstyle according to the series attributes list at Series Attributes · Plots. I run: plotly() plot(zeros(100), fillrange=rand(100), fillst…

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## [Why Nelder-Mead minimization without minimal property check?](https://discourse.julialang.org/t/why-nelder-mead-minimization-without-minimal-property-check/102236)

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**Author:** [@dietrich](https://discourse.julialang.org/u/dietrich)\
**Replies:** 27\
**Last updated:** [February 8, 2024, 2:33pm UTC](https://discourse.julialang.org/t/why-nelder-mead-minimization-without-minimal-property-check/102236 "2024-02-08T14:33:57Z")

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In a model for biology I used a code written in f90 that worked fine, but for greater readability by the future readers of the corresponding paper, I translated it into Julia. In my f90 code, I used minimization routine…

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## [Turing support for exact inference (over discrete supports)](https://discourse.julialang.org/t/turing-support-for-exact-inference-over-discrete-supports/70533)

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**Author:** [@jmuchovej](https://discourse.julialang.org/u/jmuchovej)\
**Replies:** 2\
**Last updated:** [February 8, 2024, 12:29pm UTC](https://discourse.julialang.org/t/turing-support-for-exact-inference-over-discrete-supports/70533 "2024-02-08T12:29:16Z")

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I’m working on a “Rational Speech Acts” (RSA) model. Essentially, RSA is a recursive process where you call distributions over states of the world or utterances made. So, in this case I have the following setup: functi…

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## [Plots.jl with inset](https://discourse.julialang.org/t/plots-jl-with-inset/102936)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 10\
**Last updated:** [February 8, 2024, 12:39pm UTC](https://discourse.julialang.org/t/plots-jl-with-inset/102936 "2024-02-08T12:39:09Z")

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I’m trying to use Plots.jl with an inset. For simplicity, consider the plot x=range(0,3pi/2,length=100) plot(x,\[sin.(x),sinc.(x)\], label=\["sin" "sinc"\]) Suppose I want to insert an inset in the lower left corner of …

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## [ForwardDiff.jl returns NaNs for calculating gradient of simulation model](https://discourse.julialang.org/t/forwarddiff-jl-returns-nans-for-calculating-gradient-of-simulation-model/109796)

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**Author:** [@fnoessler](https://discourse.julialang.org/u/fnoessler)\
**Replies:** 2\
**Last updated:** [February 8, 2024, 12:45pm UTC](https://discourse.julialang.org/t/forwarddiff-jl-returns-nans-for-calculating-gradient-of-simulation-model/109796 "2024-02-08T12:45:28Z")

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Hello, this is a follow up post to Differential evolution MCMC in Julia? I want to try HMC/Nuts (via DynamicHMC.jl or AdvancedHMC.jl) because the algorithms may be more efficient than Differential Evolution MCMC. I tr…

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## [How to access optional input functions in sundials.jl IDA solver](https://discourse.julialang.org/t/how-to-access-optional-input-functions-in-sundials-jl-ida-solver/109862)

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**Author:** [@Aniket\_Patra](https://discourse.julialang.org/u/Aniket_Patra)\
**Replies:** 4\
**Last updated:** [February 8, 2024, 12:10pm UTC](https://discourse.julialang.org/t/how-to-access-optional-input-functions-in-sundials-jl-ida-solver/109862 "2024-02-08T12:10:07Z")

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Hello! I am using IDA to solve a system of stiff differential equations. I know that this particular system of equations is singular. However, I am trying to understand the singularity better. It seems that at some poi…

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## [JuMP: Constraint with a huge expression](https://discourse.julialang.org/t/jump-constraint-with-a-huge-expression/108456)

<div class="topic-metadata">

**Author:** [@A\_C](https://discourse.julialang.org/u/A_C)\
**Replies:** 25\
**Last updated:** [February 8, 2024, 10:46am UTC](https://discourse.julialang.org/t/jump-constraint-with-a-huge-expression/108456 "2024-02-08T10:46:26Z")

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I am developing a package for Direct Optimal Control using JuMP. Function tracing is used heavily to formulate the problems. It works well for small to medium sized problems. However, recently I tried one largish example…

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## [How to use non-linear solvers with JuMP using AmplNLWriter](https://discourse.julialang.org/t/how-to-use-non-linear-solvers-with-jump-using-amplnlwriter/109900)

<div class="topic-metadata">

**Author:** [@Lemma](https://discourse.julialang.org/u/Lemma)\
**Replies:** 2\
**Last updated:** [February 8, 2024, 10:09am UTC](https://discourse.julialang.org/t/how-to-use-non-linear-solvers-with-jump-using-amplnlwriter/109900 "2024-02-08T10:09:04Z")

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When I try to solve any models using AmplNLWriter to call the non-linear solvers, and then call optimize! solve the problem nothing seems to happen. I use the following code: model = Model(() -\> AmplNLWriter.Optimizer(B…

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## [Streamplots with continuous lines in Makie](https://discourse.julialang.org/t/streamplots-with-continuous-lines-in-makie/109832)

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**Author:** [@Bizzi](https://discourse.julialang.org/u/Bizzi)\
**Replies:** 2\
**Last updated:** [February 7, 2024, 7:57pm UTC](https://discourse.julialang.org/t/streamplots-with-continuous-lines-in-makie/109832 "2024-02-07T19:57:28Z")

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Hey. I’m trying to draw some streamplots (following this guide) but the orbits look somewhat broken and randomly put together. I’d like to have some more control over where the orbits begin and for how long they go, but t…

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## [YAXArrays: do not save chunk that is all fill\_value](https://discourse.julialang.org/t/yaxarrays-do-not-save-chunk-that-is-all-fill-value/109880)

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**Author:** [@bjarthur](https://discourse.julialang.org/u/bjarthur)\
**Replies:** 0\
**Last updated:** [February 7, 2024, 3:36pm UTC](https://discourse.julialang.org/t/yaxarrays-do-not-save-chunk-that-is-all-fill-value/109880 "2024-02-07T15:36:06Z")

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Zarr.jl won’t save chunks whose elements are all fill\_value. Is that possible with YAXArrays.jl as well when using the zarr backend? i ask here because i don’t see a way to specify a fill value in the YAXArray document…

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## [Remove spacing between subplots in PlotlyJS](https://discourse.julialang.org/t/remove-spacing-between-subplots-in-plotlyjs/109878)

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**Author:** [@jabru](https://discourse.julialang.org/u/jabru)\
**Replies:** 0\
**Last updated:** [February 7, 2024, 2:45pm UTC](https://discourse.julialang.org/t/remove-spacing-between-subplots-in-plotlyjs/109878 "2024-02-07T14:45:56Z")

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Hi there, So I am currently trying to use PlotlyJS for my plots. I am running the following code using PlotlyJS np = pyimport("numpy") function main() trace1 = scatter(; x = rand(100), y = rand(100), …

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## [Error from example '33D Mixed-Agent Ecosystem with Pathfinding'](https://discourse.julialang.org/t/error-from-example-33d-mixed-agent-ecosystem-with-pathfinding/109868)

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**Author:** [@nadeen1507](https://discourse.julialang.org/u/nadeen1507)\
**Replies:** 0\
**Last updated:** [February 7, 2024, 1:13pm UTC](https://discourse.julialang.org/t/error-from-example-33d-mixed-agent-ecosystem-with-pathfinding/109868 "2024-02-07T13:13:27Z")

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I have copied an example form the ‘Julia Library’ line by line and I am constantly receiving this error when running the last visualization step. Please tell me how to fix it. ERROR: MethodError: no method matching abmv…

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## [DOS and LDOS using Quantica](https://discourse.julialang.org/t/dos-and-ldos-using-quantica/109822)

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**Author:** [@alex123](https://discourse.julialang.org/u/alex123)\
**Replies:** 1\
**Last updated:** [February 7, 2024, 7:37am UTC](https://discourse.julialang.org/t/dos-and-ldos-using-quantica/109822 "2024-02-07T07:37:32Z")

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Hello @pablosanjose , looking through the Quantica documentation, I could only see how to find the LDOS at a fixed energy at all sites in the lattice. Is there a way to get the LDOS at a fixed position for a range of en…

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## [Makie Label](https://discourse.julialang.org/t/makie-label/109721)

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**Author:** [@jar1](https://discourse.julialang.org/u/jar1)\
**Replies:** 5\
**Last updated:** [February 7, 2024, 7:23am UTC](https://discourse.julialang.org/t/makie-label/109721 "2024-02-07T07:23:57Z")

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Is this supposed to work? julia\> let f = Figure() ax = Axis(f\[1,1\]) Label(ax, "hello") f end ERROR: MethodError: no method matching \_block(::Type{Label}, ::Axis; text::String) Cl…

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## [Vectorize Julia JuMP code](https://discourse.julialang.org/t/vectorize-julia-jump-code/109844)

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**Author:** [@sati](https://discourse.julialang.org/u/sati)\
**Replies:** 1\
**Last updated:** [February 6, 2024, 11:39pm UTC](https://discourse.julialang.org/t/vectorize-julia-jump-code/109844 "2024-02-06T23:39:38Z")

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Hi all, I have the code below. How can we write this code in a vectorized way? using JuMP using SparseArrays model = Model() D = \[1,2,3\] L = \[1,2,3,4,5\] line2dem = sparse(\[1, 2, 3\], \[1, 2, 3\], \[1, 1, 1\], 8, 3) lineIRe…

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## [No method matching default\_algorithm in SDDEProblem; SDEProblem and DDEProblem work](https://discourse.julialang.org/t/no-method-matching-default-algorithm-in-sddeproblem-sdeproblem-and-ddeproblem-work/109749)

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**Author:** [@cjoshliu](https://discourse.julialang.org/u/cjoshliu)\
**Replies:** 3\
**Last updated:** [February 6, 2024, 10:00pm UTC](https://discourse.julialang.org/t/no-method-matching-default-algorithm-in-sddeproblem-sdeproblem-and-ddeproblem-work/109749 "2024-02-06T22:00:27Z")

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Hi, I tried running the example from the SDDE solvers documentation using DifferentialEquations function hayes\_modelf(du, u, h, p, t) τ, a, b, c, α, β, γ = p du .= a .\* u .+ b .\* h(p, t - τ) .+ c end function h…

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## [Improve speed SDP variable entries continuous 0-1 in Convex.jl](https://discourse.julialang.org/t/improve-speed-sdp-variable-entries-continuous-0-1-in-convex-jl/109794)

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**Author:** [@Kieran\_Marray](https://discourse.julialang.org/u/Kieran_Marray)\
**Replies:** 4\
**Last updated:** [February 6, 2024, 9:44pm UTC](https://discourse.julialang.org/t/improve-speed-sdp-variable-entries-continuous-0-1-in-convex-jl/109794 "2024-02-06T21:44:39Z")

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Hi I am trying to solve a large SDP with two matrix constraints using SCS in Convex.jl. I want to constrain all entries of my variable (a matrix) to all be continuous between 0 and 1, and was wondering what the most eff…

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## [Error adding CUDA on Windows 11 and Julia 1.10. It works with Julia 1.9](https://discourse.julialang.org/t/error-adding-cuda-on-windows-11-and-julia-1-10-it-works-with-julia-1-9/109476)

<div class="topic-metadata">

**Author:** [@LucB](https://discourse.julialang.org/u/LucB)\
**Replies:** 8\
**Last updated:** [February 6, 2024, 8:08pm UTC](https://discourse.julialang.org/t/error-adding-cuda-on-windows-11-and-julia-1-10-it-works-with-julia-1-9/109476 "2024-02-06T20:08:30Z")

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Hi, I use juliaup to have 1.10 and 1.9 version. I have an application working with 1.9, CUDA (ML with Flux). When I switch to Julia 1.10 I’m unable to add CUDA. (I have the last NVIDIA driver installed). This is the err…

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## [Trainning UODE over multiple species](https://discourse.julialang.org/t/trainning-uode-over-multiple-species/100440)

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**Author:** [@James\_Fernandez](https://discourse.julialang.org/u/James_Fernandez)\
**Replies:** 0\
**Last updated:** [June 16, 2023, 9:49am UTC](https://discourse.julialang.org/t/trainning-uode-over-multiple-species/100440 "2023-06-16T09:49:42Z")

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I am trying to model the Lotka-Volterra system for multiple species. The system is defined as: \\left\\{\\begin{matrix} \\frac{\\mathrm{d} x}{\\mathrm{d} t}=\\alpha x - \\beta xy\\\\ \\frac{\\mathrm{d} y}{\\mathrm{d} t}=-\\del…

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## [How to make ridgeline plot (sparkline, joyplot) using Plots.jl?](https://discourse.julialang.org/t/how-to-make-ridgeline-plot-sparkline-joyplot-using-plots-jl/109826)

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**Author:** [@homocomputeris](https://discourse.julialang.org/u/homocomputeris)\
**Replies:** 0\
**Last updated:** [February 6, 2024, 5:59pm UTC](https://discourse.julialang.org/t/how-to-make-ridgeline-plot-sparkline-joyplot-using-plots-jl/109826 "2024-02-06T17:59:00Z")

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I want to make a plot like this one: Makie has an example but I want to make the same in Plots.jl in order to not use 2 packages. More specifically, I’d like to have: no 3D, “parallax” or any kind of perspective d…

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## [Calculation of gain margin fails](https://discourse.julialang.org/t/calculation-of-gain-margin-fails/109819)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 1\
**Last updated:** [February 6, 2024, 4:42pm UTC](https://discourse.julialang.org/t/calculation-of-gain-margin-fails/109819 "2024-02-06T16:42:46Z")

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I have the following code: using ControlSystemsBase Ts = 0.01 Ku = 100/5e6 K2 = 5e6 num = \[Ku \* Ts\] den = \[1, -1\] P = tf(num, den, Ts) # plant C = K2 sys = feedback(P, C) ol\_sys = P\*C margin(ol\_sys) If I create a bod…

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## [Using symbolic variables in control systems](https://discourse.julialang.org/t/using-symbolic-variables-in-control-systems/109810)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 3\
**Last updated:** [February 6, 2024, 3:11pm UTC](https://discourse.julialang.org/t/using-symbolic-variables-in-control-systems/109810 "2024-02-06T15:11:41Z")

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Is it possible to use symbolic variables when defining a discrete time control system? The following code fails: using ControlSystemsBase, ModelingToolkit @parameters Ts # Ts = 0.01 Ku = 200/5e6 K2 = 5e6 num = \[Ku \* …

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## [Number of domains in method of lines](https://discourse.julialang.org/t/number-of-domains-in-method-of-lines/109813)

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**Author:** [@Sisuvoima10](https://discourse.julialang.org/u/Sisuvoima10)\
**Replies:** 0\
**Last updated:** [February 6, 2024, 2:49pm UTC](https://discourse.julialang.org/t/number-of-domains-in-method-of-lines/109813 "2024-02-06T14:49:32Z")

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Hello to all, I have been trying to model a simple diffusion problem consisting from 3 different domains that are connected through interfaces. Problem is just in 1D and and the domains are connected to each other in fo…

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## [Websocket problem using WGLMakie from Pluto on a remote server](https://discourse.julialang.org/t/websocket-problem-using-wglmakie-from-pluto-on-a-remote-server/109802)

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**Author:** [@vvbond](https://discourse.julialang.org/u/vvbond)\
**Replies:** 0\
**Last updated:** [February 6, 2024, 1:36pm UTC](https://discourse.julialang.org/t/websocket-problem-using-wglmakie-from-pluto-on-a-remote-server/109802 "2024-02-06T13:36:10Z")

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Hi! I’m having troubles rendering WGLMakie plots in Pluto on a remote Windows server. According to the documentation, the following should work: # ╔═╡ d64ef27e-c4dc-11ee-00ed-d16bd2708611 using WGLMakie # ╔═╡ 3e80ef35-…

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## [How to prove stability of discrete time system](https://discourse.julialang.org/t/how-to-prove-stability-of-discrete-time-system/109789)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 2\
**Last updated:** [February 6, 2024, 11:37am UTC](https://discourse.julialang.org/t/how-to-prove-stability-of-discrete-time-system/109789 "2024-02-06T11:37:46Z")

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I am simulating the following discrete time feedback system: How can I prove that it is stable for K\_\\mathrm{u} \< 2 \\frac{1}{T\_\\mathrm{s} K\_2} ? Code: using ControlSystemsBase Ts = 0.01 Ku = 100/5e6 K2 = 5e6 nu…

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