# Specific Domains

**URL:** https://discourse.julialang.org/c/domain/10.md?no_subcategories=false&page=223

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**Page:** 224

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## [Where is T distribution on Distributions.jl?](https://discourse.julialang.org/t/where-is-t-distribution-on-distributions-jl/92887)

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**Author:** [@jcbritobr](https://discourse.julialang.org/u/jcbritobr)\
**Replies:** 1\
**Last updated:** [January 12, 2023, 6:17pm UTC](https://discourse.julialang.org/t/where-is-t-distribution-on-distributions-jl/92887 "2023-01-12T18:17:39Z")

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Hello, good morning. Tryed search on documentation, but cant find a T distribution on julia Distributions.jl. Where can I find it?

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## [Interface boundaries Warning in MethodOfLines.jl](https://discourse.julialang.org/t/interface-boundaries-warning-in-methodoflines-jl/92813)

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**Author:** [@anh](https://discourse.julialang.org/u/anh)\
**Replies:** 3\
**Last updated:** [January 12, 2023, 3:04pm UTC](https://discourse.julialang.org/t/interface-boundaries-warning-in-methodoflines-jl/92813 "2023-01-12T15:04:46Z")

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Hello, I’m very new to posting questions on here so I apologize in advance for any formatting/convention mistakes or if anything is unclear! I am trying to solve a PDE using MethodOfLines.jl and receive the following wa…

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## [NLP is not solving in ubuntu OS whereas It is solving in Windows OS with all versions of package and Julia is same (Juniper optimzer with Ipopt and HiGHS)](https://discourse.julialang.org/t/nlp-is-not-solving-in-ubuntu-os-whereas-it-is-solving-in-windows-os-with-all-versions-of-package-and-julia-is-same-juniper-optimzer-with-ipopt-and-highs/92866)

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**Author:** [@Balakumar\_A](https://discourse.julialang.org/u/Balakumar_A)\
**Replies:** 3\
**Last updated:** [January 12, 2023, 2:56pm UTC](https://discourse.julialang.org/t/nlp-is-not-solving-in-ubuntu-os-whereas-it-is-solving-in-windows-os-with-all-versions-of-package-and-julia-is-same-juniper-optimzer-with-ipopt-and-highs/92866 "2023-01-12T14:56:30Z")

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I am trying to Solve a Non Linear model using Juniper with Ipopt and GiGHS. I am getting solution in my windows operating system, whereas Ubuntu OS is not giving any results immediately as it is saying NLP couldn’t solve…

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## [Calling cublas within a kernel?](https://discourse.julialang.org/t/calling-cublas-within-a-kernel/92852)

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**Author:** [@bcsj](https://discourse.julialang.org/u/bcsj)\
**Replies:** 0\
**Last updated:** [January 12, 2023, 8:39am UTC](https://discourse.julialang.org/t/calling-cublas-within-a-kernel/92852 "2023-01-12T08:39:24Z")

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Hi, I’m working on speeding up an iterative algorithm by running it on the gpu. Being iterative, depending on the problem structure it may at times take on the other of 10^6 iterations to reach a good solution, and I’d l…

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## [Minimizing the distance between centers of multiple circles](https://discourse.julialang.org/t/minimizing-the-distance-between-centers-of-multiple-circles/92843)

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**Author:** [@MadJoe](https://discourse.julialang.org/u/MadJoe)\
**Replies:** 5\
**Last updated:** [January 12, 2023, 5:47am UTC](https://discourse.julialang.org/t/minimizing-the-distance-between-centers-of-multiple-circles/92843 "2023-01-12T05:47:14Z")

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Hello, I am new to optimization and Julia, and I need to minimize the distance between some circles that encircle multiple points in a 2-D plane by moving the centers of the circles. We know where all of the blue spots a…

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## [Nested optimizations, vars traverse nesting](https://discourse.julialang.org/t/nested-optimizations-vars-traverse-nesting/91960)

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**Author:** [@JeffreySarnoff](https://discourse.julialang.org/u/JeffreySarnoff)\
**Replies:** 7\
**Last updated:** [January 12, 2023, 2:53am UTC](https://discourse.julialang.org/t/nested-optimizations-vars-traverse-nesting/91960 "2023-01-12T02:53:18Z")

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Someone asked for my help with this, however it is outside my experience. I am told the outer maximization is a quadratic in αi and βi and the inner minimization is solvable by e.g gradient descent maximize( m…

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## [Matrix-Free Eigensolver in BifurcationKit.jl](https://discourse.julialang.org/t/matrix-free-eigensolver-in-bifurcationkit-jl/92780)

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**Author:** [@TKBlarg](https://discourse.julialang.org/u/TKBlarg)\
**Replies:** 11\
**Last updated:** [January 11, 2023, 7:56pm UTC](https://discourse.julialang.org/t/matrix-free-eigensolver-in-bifurcationkit-jl/92780 "2023-01-11T19:56:11Z")

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I have a large-scale continuation problem for which I’m considering using matrix-free methods in Bifurcationkit.jl. To evaluate stability and detect bifurcations, I implemented a matrix-free, shift-inverting eigensolver …

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## [How can I fix my code to run using JuMP](https://discourse.julialang.org/t/how-can-i-fix-my-code-to-run-using-jump/92573)

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**Author:** [@lara](https://discourse.julialang.org/u/lara)\
**Replies:** 3\
**Last updated:** [January 11, 2023, 8:34pm UTC](https://discourse.julialang.org/t/how-can-i-fix-my-code-to-run-using-jump/92573 "2023-01-11T20:34:44Z")

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Hey, guys. This is my first time working with both Julia and JuMP. I’m making lot of mistakes, but I finally got my code running fine. Using JuMP in my code would be a plus, so I’m trying to do that, but I am having pro…

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## [Solve JuMP model with COSMO arbitrary precision](https://discourse.julialang.org/t/solve-jump-model-with-cosmo-arbitrary-precision/92807)

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**Author:** [@Thomas](https://discourse.julialang.org/u/Thomas)\
**Replies:** 1\
**Last updated:** [January 11, 2023, 8:30pm UTC](https://discourse.julialang.org/t/solve-jump-model-with-cosmo-arbitrary-precision/92807 "2023-01-11T20:30:02Z")

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Afaik there is no support for arbitrary precision in JuMP, but is there a quick hack for COSMO?

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## [Overlay values as text in a PlotlyJS heatmap annotations](https://discourse.julialang.org/t/overlay-values-as-text-in-a-plotlyjs-heatmap-annotations/92733)

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**Author:** [@sob](https://discourse.julialang.org/u/sob)\
**Replies:** 5\
**Last updated:** [January 11, 2023, 5:18pm UTC](https://discourse.julialang.org/t/overlay-values-as-text-in-a-plotlyjs-heatmap-annotations/92733 "2023-01-11T17:18:07Z")

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Hi, My code is rather simple: using PlotlyJS plot(heatmap(x=\["a","b"\],y=\["c","d"\],z=rand(2,2),colorscale="Reds",showscale=false)) I’m trying to have the values as an overlay (say black text) on each of the 4 squares. …

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## [Extending a system with a constant parameter to allow parameter to vary](https://discourse.julialang.org/t/extending-a-system-with-a-constant-parameter-to-allow-parameter-to-vary/92566)

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**Author:** [@ctessum](https://discourse.julialang.org/u/ctessum)\
**Replies:** 5\
**Last updated:** [January 11, 2023, 3:48pm UTC](https://discourse.julialang.org/t/extending-a-system-with-a-constant-parameter-to-allow-parameter-to-vary/92566 "2023-01-11T15:48:56Z")

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Hello! Let’s say I have a ModelingToolkit system that has a constant parameter, for example a falling object with a constant mass: function newton() @parameters g = -9.8 @parameters m = 1.0 @variables t …

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## [Isolate single species when plotting ensemble problem](https://discourse.julialang.org/t/isolate-single-species-when-plotting-ensemble-problem/92784)

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**Author:** [@Dragolonth](https://discourse.julialang.org/u/Dragolonth)\
**Replies:** 3\
**Last updated:** [January 11, 2023, 2:57pm UTC](https://discourse.julialang.org/t/isolate-single-species-when-plotting-ensemble-problem/92784 "2023-01-11T14:57:39Z")

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Hi everyone. I’ve created an ensemble problem for a reaction network with many species. However, currently, the plot shows each trajectory for each species. For example, my reaction network has 19 species, so when I spec…

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## [Cannot Read LP file](https://discourse.julialang.org/t/cannot-read-lp-file/92787)

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**Author:** [@Stuart\_Rogers](https://discourse.julialang.org/u/Stuart_Rogers)\
**Replies:** 2\
**Last updated:** [January 11, 2023, 5:11am UTC](https://discourse.julialang.org/t/cannot-read-lp-file/92787 "2023-01-11T05:11:16Z")

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read\_from\_file throws an error when trying to read an LP file (min\_max\_overlap\_Gen8.lp, which is 1.6 MB and is comprised of 33,885 lines), representing a MILP. SCIP on the NEOS Server is able to read and solve the LP fil…

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## [Sampling gives chains which converge to two different distributions in ODE example of TuringTutorials](https://discourse.julialang.org/t/sampling-gives-chains-which-converge-to-two-different-distributions-in-ode-example-of-turingtutorials/92734)

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**Author:** [@Manuel\_Eguia](https://discourse.julialang.org/u/Manuel_Eguia)\
**Replies:** 4\
**Last updated:** [January 11, 2023, 12:54am UTC](https://discourse.julialang.org/t/sampling-gives-chains-which-converge-to-two-different-distributions-in-ode-example-of-turingtutorials/92734 "2023-01-11T00:54:31Z")

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I was trying to sample the posterior for the parameters and initial condition of a very simple ODE taking the example from https://turing.ml/v0.21/tutorials/10-bayesian-differential-equations/ as a model, and I was alw…

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## [PrettyTables.jl =\> Font Type and Size](https://discourse.julialang.org/t/prettytables-jl-font-type-and-size/92782)

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**Author:** [@lgmendes](https://discourse.julialang.org/u/lgmendes)\
**Replies:** 0\
**Last updated:** [January 10, 2023, 11:31pm UTC](https://discourse.julialang.org/t/prettytables-jl-font-type-and-size/92782 "2023-01-10T23:31:37Z")

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How can I change the font type and size of the HTML output generated using PrettyTables.jl and presented in Pluto? It is possible to rotate the text of the header 45º degrees? begin data=fill(1.0,4,4) header=\[“aaaa…

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## [Conditional logit (clogit) in Julia?](https://discourse.julialang.org/t/conditional-logit-clogit-in-julia/64215)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 4\
**Last updated:** [January 10, 2023, 5:39pm UTC](https://discourse.julialang.org/t/conditional-logit-clogit-in-julia/64215 "2023-01-10T17:39:20Z")

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Given it isn’t at all my subject, a colleague of mine interested in Julia asked if there is a Julia package that implements the “conditional logit” model, similar to the clogit function in R survival package. Having br…

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## [Is it possible to plot gain margin and phase margin on the bode diagram?](https://discourse.julialang.org/t/is-it-possible-to-plot-gain-margin-and-phase-margin-on-the-bode-diagram/89876)

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**Author:** [@lucasmsoares96](https://discourse.julialang.org/u/lucasmsoares96)\
**Replies:** 5\
**Last updated:** [January 10, 2023, 3:12pm UTC](https://discourse.julialang.org/t/is-it-possible-to-plot-gain-margin-and-phase-margin-on-the-bode-diagram/89876 "2023-01-10T15:12:39Z")

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I didn’t find anything about this in the documentation.

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## [MethodOfLines.jl: Obtain Jacobian of MOL semi-discretization](https://discourse.julialang.org/t/methodoflines-jl-obtain-jacobian-of-mol-semi-discretization/92681)

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**Author:** [@DanDoe](https://discourse.julialang.org/u/DanDoe)\
**Replies:** 5\
**Last updated:** [January 10, 2023, 1:41pm UTC](https://discourse.julialang.org/t/methodoflines-jl-obtain-jacobian-of-mol-semi-discretization/92681 "2023-01-10T13:41:40Z")

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Consider an exemplary PDE with temporal & spatial derivatives \\partial\_t u(t, x) + D\_x f\\big(u(t, x)\\big) = 0 Where D\_x is a general differential operator, like the Laplacian and f is some function. I can use MethodO…

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## [When to update agent property that depends on moves of all other agents](https://discourse.julialang.org/t/when-to-update-agent-property-that-depends-on-moves-of-all-other-agents/92695)

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**Author:** [@SDA](https://discourse.julialang.org/u/SDA)\
**Replies:** 5\
**Last updated:** [January 10, 2023, 11:53am UTC](https://discourse.julialang.org/t/when-to-update-agent-property-that-depends-on-moves-of-all-other-agents/92695 "2023-01-10T11:53:30Z")

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Hi everyone, I’m confused about how an agent property should be best updated within the Agents.jl package. At each time step, each agent does some computation and then moves to a new location. The agent property should…

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## [Pgfplotsx with \\mathbb](https://discourse.julialang.org/t/pgfplotsx-with-mathbb/92747)

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**Author:** [@Elyco](https://discourse.julialang.org/u/Elyco)\
**Replies:** 2\
**Last updated:** [January 10, 2023, 10:21am UTC](https://discourse.julialang.org/t/pgfplotsx-with-mathbb/92747 "2023-01-10T10:21:10Z")

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Hi, I’m trying to put a latex label \\mathbb{R} with pgfplotsx() backend. But I get an error: using Plots using LaTeXStrings pgfplotsx() plot(rand(10), label=L"\\mathcal{R}^{2N}") |\> display # works! plot(rand(10), labe…

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## [Hyperopt.jl Hyperband states existing variables are undefined](https://discourse.julialang.org/t/hyperopt-jl-hyperband-states-existing-variables-are-undefined/92740)

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**Author:** [@RLB](https://discourse.julialang.org/u/RLB)\
**Replies:** 0\
**Last updated:** [January 10, 2023, 1:30am UTC](https://discourse.julialang.org/t/hyperopt-jl-hyperband-states-existing-variables-are-undefined/92740 "2023-01-10T01:30:37Z")

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Package Versions: Julia - v1.8.3 Flux - v0.13.9 Hyperopt - v0.5.6 I’m attempting to use the Hyperopt.jl package to help tune the layers and number of nodes in a neural network. I would like to be able to use their im…

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## [Color-blind-friendly color sequence (palette) for line graphs](https://discourse.julialang.org/t/color-blind-friendly-color-sequence-palette-for-line-graphs/92551)

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**Author:** [@ryofurue](https://discourse.julialang.org/u/ryofurue)\
**Replies:** 24\
**Last updated:** [January 10, 2023, 12:34am UTC](https://discourse.julialang.org/t/color-blind-friendly-color-sequence-palette-for-line-graphs/92551 "2023-01-10T00:34:01Z")

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I’d like to know “what” the default color sequence is for line graphs, such as the sample code below generates. In particular I’d like to know whether consideration has gone into the color palette about color blindness.…

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## [Calling chemical kinetics solvers like CHEMKIN or Cantera from Julia](https://discourse.julialang.org/t/calling-chemical-kinetics-solvers-like-chemkin-or-cantera-from-julia/50568)

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**Author:** [@R\_Surya\_Narayan](https://discourse.julialang.org/u/R_Surya_Narayan)\
**Replies:** 2\
**Last updated:** [January 9, 2023, 9:46pm UTC](https://discourse.julialang.org/t/calling-chemical-kinetics-solvers-like-chemkin-or-cantera-from-julia/50568 "2023-01-09T21:46:12Z")

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Hello Everyone. I am relatively new to Julia and I am using it to solve a chemically-reacting flow problem that requires extensive reaction-rate and species thermodynamic-data. I came across one such open-source software…

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## [PrettyTables diff digits highlight?](https://discourse.julialang.org/t/prettytables-diff-digits-highlight/92664)

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**Author:** [@LaurentPlagne](https://discourse.julialang.org/u/LaurentPlagne)\
**Replies:** 9\
**Last updated:** [January 9, 2023, 7:52pm UTC](https://discourse.julialang.org/t/prettytables-diff-digits-highlight/92664 "2023-01-09T19:52:07Z")

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Hi, First, kudos again to @Ronis\_BR for the super useful PrettyTables.jl package ! I was wondering if it could be possible to highlight diff digits between two columns with PrettyTables.jl like

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## [How to implement custom image dataset for cnn in Julia Flux?](https://discourse.julialang.org/t/how-to-implement-custom-image-dataset-for-cnn-in-julia-flux/92505)

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**Author:** [@Hardik\_Sakpal](https://discourse.julialang.org/u/Hardik_Sakpal)\
**Replies:** 6\
**Last updated:** [January 9, 2023, 7:00pm UTC](https://discourse.julialang.org/t/how-to-implement-custom-image-dataset-for-cnn-in-julia-flux/92505 "2023-01-09T19:00:00Z")

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Hello, I want to train a CNN model using Julia Flux but I am not able to load and preprocess the custom image dataset for training. Can anyone provide me the code snippet for loading the custom image dataset and preproc…

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## [DiffEqSensitivitys Manual VJPs documentation seems missing information](https://discourse.julialang.org/t/diffeqsensitivitys-manual-vjps-documentation-seems-missing-information/91890)

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**Author:** [@damianoognissanti](https://discourse.julialang.org/u/damianoognissanti)\
**Replies:** 3\
**Last updated:** [January 9, 2023, 3:24pm UTC](https://discourse.julialang.org/t/diffeqsensitivitys-manual-vjps-documentation-seems-missing-information/91890 "2023-01-09T15:24:54Z")

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Hello I am trying to add Manual VJPs to a project I am working on using adjoint\_sensitivities (from DiffEqSensitivity.jl), but the documentation seems missing information: https://docs.juliahub.com/DiffEqSensitivity/02…

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## [Zygote calculate adjoint only for one of several arguments](https://discourse.julialang.org/t/zygote-calculate-adjoint-only-for-one-of-several-arguments/59606)

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**Author:** [@roflmaostc](https://discourse.julialang.org/u/roflmaostc)\
**Replies:** 5\
**Last updated:** [January 9, 2023, 3:06pm UTC](https://discourse.julialang.org/t/zygote-calculate-adjoint-only-for-one-of-several-arguments/59606 "2023-01-09T15:06:52Z")

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Hey, is there a way that Zygote prevents the calculation of adjoints which are not needed at all? Let’s say we have a function f(a, b) where we only want to have the first gradient: b = #some value g(a) = f(a, b) Zygo…

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## [Meaning of warning: skipping PenaltyRelaxation](https://discourse.julialang.org/t/meaning-of-warning-skipping-penaltyrelaxation/92703)

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**Author:** [@floswald](https://discourse.julialang.org/u/floswald)\
**Replies:** 2\
**Last updated:** [January 9, 2023, 12:29pm UTC](https://discourse.julialang.org/t/meaning-of-warning-skipping-penaltyrelaxation/92703 "2023-01-09T12:29:25Z")

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what is the meaning of the warning in the example here: julia\> map = relax\_with\_penalty!(model) ┌ Warning: Skipping PenaltyRelaxation for ConstraintIndex{MathOptInterface.VariableIndex,MathOptInterface.GreaterThan{Float…

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## [MethodError: no method matching Float32(::RGB{N0f8})](https://discourse.julialang.org/t/methoderror-no-method-matching-float32-rgb-n0f8/92701)

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**Author:** [@Hardik\_Sakpal](https://discourse.julialang.org/u/Hardik_Sakpal)\
**Replies:** 4\
**Last updated:** [January 9, 2023, 10:56am UTC](https://discourse.julialang.org/t/methoderror-no-method-matching-float32-rgb-n0f8/92701 "2023-01-09T10:56:43Z")

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Hello All, I am trying to do CNN Classification using Julia Flux but while doing so in one of the codes I am getting above mentioned error. using Flux using FileIO using Plots using Images using MLDataUtils: splitobs, …

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## [Symmetry breaking: scheduling problems with job duration dependent on ressource allocation](https://discourse.julialang.org/t/symmetry-breaking-scheduling-problems-with-job-duration-dependent-on-ressource-allocation/92220)

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**Author:** [@JNSDVD](https://discourse.julialang.org/u/JNSDVD)\
**Replies:** 5\
**Last updated:** [January 9, 2023, 9:51am UTC](https://discourse.julialang.org/t/symmetry-breaking-scheduling-problems-with-job-duration-dependent-on-ressource-allocation/92220 "2023-01-09T09:51:27Z")

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Hey guys, I have been struggeling to speed up my optimization for quite a while now. Any help is highly appreciated! In contrast to most of the research, I deal with entities (=worker) and not with machines. But since …

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