# Latest

**URL:** https://discourse.julialang.org/latest.md?page=1239

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

**Page:** 1240

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## [Looking For A Few Talented Julia Developers- Work Remote](https://discourse.julialang.org/t/looking-for-a-few-talented-julia-developers-work-remote/69706)

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**Author:** [@juliafanatics](https://discourse.julialang.org/u/juliafanatics)\
**Replies:** 0\
**Last updated:** [October 13, 2021, 5:49pm UTC](https://discourse.julialang.org/t/looking-for-a-few-talented-julia-developers-work-remote/69706 "2021-10-13T17:49:41Z")

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Julia Programmers- Remote Work This is your opportunity to be part of a growing team that loves Julia! We are an established software development company that has been using Julia for many years. We are currently lookin…

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## [Data type related debugging help](https://discourse.julialang.org/t/data-type-related-debugging-help/69700)

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**Author:** [@leon](https://discourse.julialang.org/u/leon)\
**Replies:** 2\
**Last updated:** [October 13, 2021, 5:37pm UTC](https://discourse.julialang.org/t/data-type-related-debugging-help/69700 "2021-10-13T17:37:37Z")

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The below data (test.mat) was created inside Matlab, and the values were double inside Matlab before they were saved into the mat file. However, I’m having lots of trouble using them inside Julia: test.mat Below is my …

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## [PackageCompiler "create\_app" function failing on slurm cluster: "error: undefined reference to 'ceil'"](https://discourse.julialang.org/t/packagecompiler-create-app-function-failing-on-slurm-cluster-error-undefined-reference-to-ceil/69344)

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**Author:** [@amckay1](https://discourse.julialang.org/u/amckay1)\
**Replies:** 18\
**Last updated:** [October 13, 2021, 5:31pm UTC](https://discourse.julialang.org/t/packagecompiler-create-app-function-failing-on-slurm-cluster-error-undefined-reference-to-ceil/69344 "2021-10-13T17:31:35Z")

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Hi, I’m trying to figure out how best to troubleshoot this issue, but I’d like to use PackageCompiler to create a relocatable binary for collaborators. I upgraded PackageCompiler to v1.7.0 (on Julia v1.6.3) and that took…

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## [Setting heuristic solution involving symmetric matrix in JuMP callback](https://discourse.julialang.org/t/setting-heuristic-solution-involving-symmetric-matrix-in-jump-callback/69621)

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**Author:** [@Shuvomoy\_Das\_Gupta](https://discourse.julialang.org/u/Shuvomoy_Das_Gupta)\
**Replies:** 7\
**Last updated:** [October 13, 2021, 5:11pm UTC](https://discourse.julialang.org/t/setting-heuristic-solution-involving-symmetric-matrix-in-jump-callback/69621 "2021-10-13T17:11:52Z")

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Dear All, I am experimenting with JuMP callback with Gurobi’s MIQCP feature, where I am storing the heuristic values based on tips from https://discourse.julialang.org/t/jump-cplex-how-to-set-heuristic-solution-using-sp…

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## [Documenter With Nested Modules](https://discourse.julialang.org/t/documenter-with-nested-modules/69702)

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**Author:** [@Luapulu](https://discourse.julialang.org/u/Luapulu)\
**Replies:** 0\
**Last updated:** [October 13, 2021, 5:10pm UTC](https://discourse.julialang.org/t/documenter-with-nested-modules/69702 "2021-10-13T17:10:58Z")

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I have a package, which looks something like module MyPackage module Sub1 module SubSub1 # some code end # some code end module Sub2 end end When I try to run docte…

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## [Writing a module using paralellization with @everywhere and @parallel](https://discourse.julialang.org/t/writing-a-module-using-paralellization-with-everywhere-and-parallel/7334)

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**Author:** [@tim](https://discourse.julialang.org/u/tim)\
**Replies:** 1\
**Last updated:** [October 13, 2021, 5:07pm UTC](https://discourse.julialang.org/t/writing-a-module-using-paralellization-with-everywhere-and-parallel/7334 "2021-10-13T17:07:45Z")

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Hi, I am rather new to julia and am trying to speed up some processes by using @parallel . But somehow I get confused with the correct way of including a (possible) parallelization in a module. If I use @everywhere ins…

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## [\[ANN\] ECC.jl: Elliptic Curve Cryptography](https://discourse.julialang.org/t/ann-ecc-jl-elliptic-curve-cryptography/18275)

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**Author:** [@roshii](https://discourse.julialang.org/u/roshii)\
**Replies:** 0\
**Last updated:** [December 4, 2018, 11:27am UTC](https://discourse.julialang.org/t/ann-ecc-jl-elliptic-curve-cryptography/18275 "2018-12-04T11:27:03Z")

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https://gitlab.com/braneproject/ecc.jl

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## [Running a distributed calculation on JuliaHub](https://discourse.julialang.org/t/running-a-distributed-calculation-on-juliahub/69660)

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**Author:** [@AndreyO](https://discourse.julialang.org/u/AndreyO)\
**Replies:** 1\
**Last updated:** [October 13, 2021, 3:56pm UTC](https://discourse.julialang.org/t/running-a-distributed-calculation-on-juliahub/69660 "2021-10-13T15:56:35Z")

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Hi! I’m trying to run a distributed nested loop on JuliaHub with 3-10 workers. The code evaluates a marginal likelihood function on a 3-d grid with the help of a distributed array: logML\_mat = Array{Float64}(undef, np,…

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## [How to delete following columns from matrix in julia (specific case)](https://discourse.julialang.org/t/how-to-delete-following-columns-from-matrix-in-julia-specific-case/69607)

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**Author:** [@yewalenikhil65](https://discourse.julialang.org/u/yewalenikhil65)\
**Replies:** 11\
**Last updated:** [October 13, 2021, 3:46pm UTC](https://discourse.julialang.org/t/how-to-delete-following-columns-from-matrix-in-julia-specific-case/69607 "2021-10-13T15:46:47Z")

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consider following matrix, julia\> b = \[-1 1 0 0 0 0;1 -1 -1 1 0 0;0 0 1 -1 -1 1;0 0 0 0 1 -1\] 4×6 Matrix{Int64}: -1 1 0 0 0 0 1 -1 -1 1 0 0 0 0 1 -1 -1 1 0 0 0 0 1 -1 how do i…

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## [Lenia - continuous game of life in julia?](https://discourse.julialang.org/t/lenia-continuous-game-of-life-in-julia/69690)

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**Author:** [@feanor12](https://discourse.julialang.org/u/feanor12)\
**Replies:** 0\
**Last updated:** [October 13, 2021, 3:20pm UTC](https://discourse.julialang.org/t/lenia-continuous-game-of-life-in-julia/69690 "2021-10-13T15:20:08Z")

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Is there a Julia version of Lenia? https://github.com/Chakazul/Lenia Lenia is a continuous version of Conway’s game of life, which looks quite nice. It might be interesting to see how easy it is to write in Julia maybe…

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## [Makie.jl x and y axis through origin (0, 0)](https://discourse.julialang.org/t/makie-jl-x-and-y-axis-through-origin-0-0/69683)

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**Author:** [@TheLateKronos](https://discourse.julialang.org/u/TheLateKronos)\
**Replies:** 4\
**Last updated:** [October 13, 2021, 2:30pm UTC](https://discourse.julialang.org/t/makie-jl-x-and-y-axis-through-origin-0-0/69683 "2021-10-13T14:30:16Z")

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I want to create plots with Makie that have the frame going through the origin. Examples are seen in https://docs.juliaplots.org/latest/generated/plotlyjs/#plotlyjs-ref34 docs, which directs you to I am looking from :…

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## [Unrecognized gradient using Zygote for AD with Universal Differential Equations](https://discourse.julialang.org/t/unrecognized-gradient-using-zygote-for-ad-with-universal-differential-equations/63791)

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**Author:** [@facusapienza](https://discourse.julialang.org/u/facusapienza)\
**Replies:** 30\
**Last updated:** [October 13, 2021, 2:02pm UTC](https://discourse.julialang.org/t/unrecognized-gradient-using-zygote-for-ad-with-universal-differential-equations/63791 "2021-10-13T14:02:38Z")

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Hi! I am trying to train a Universal Differential Equation (UDE) using implicit automatic differentiation with Zygote. I am doing this manually, without using DifferentialEquations. A large part of my code (that I am not…

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## [Defining constraints using JuMP](https://discourse.julialang.org/t/defining-constraints-using-jump/69659)

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**Author:** [@FH96](https://discourse.julialang.org/u/FH96)\
**Replies:** 4\
**Last updated:** [October 13, 2021, 1:43pm UTC](https://discourse.julialang.org/t/defining-constraints-using-jump/69659 "2021-10-13T13:43:42Z")

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while defining constraints in a nonlinear optimization problem ,I face this error: “MethodError: no method matching \*(::DataFrame, ::Vector{VariableRef}))” can anyone help? here’s part of my code: s\_matrix\_df=DataFra…

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## [Plot xticks correctly](https://discourse.julialang.org/t/plot-xticks-correctly/69652)

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**Author:** [@vinicius\_de\_lima](https://discourse.julialang.org/u/vinicius_de_lima)\
**Replies:** 11\
**Last updated:** [October 13, 2021, 1:09pm UTC](https://discourse.julialang.org/t/plot-xticks-correctly/69652 "2021-10-13T13:09:18Z")

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I’m trying to reproduce this bar plot: With the following code: using Plots,DelimitedFiles f = readdlm("ch3\_data\_english.txt") bar(f/100, xticks = (1:26,'a':'z'), yticks = 0:0.02:0.2, ylims = (0,0.13),xlims = (1,26),…

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## [ModuleElts](https://discourse.julialang.org/t/moduleelts/69675)

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**Author:** [@Jean\_Michel](https://discourse.julialang.org/u/Jean_Michel)\
**Replies:** 0\
**Last updated:** [October 13, 2021, 10:31am UTC](https://discourse.julialang.org/t/moduleelts/69675 "2021-10-13T10:31:21Z")

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This is to announce a new package. Comments/ideas/criticisms are welcome. ModuleElts Module Elements — elements of free modules. A ModuleElt{K,V} represents an element of a free module where basis elements are…

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## [CI tests failing on windows (passing on other OS) while using Github actions](https://discourse.julialang.org/t/ci-tests-failing-on-windows-passing-on-other-os-while-using-github-actions/69677)

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**Author:** [@jishnub](https://discourse.julialang.org/u/jishnub)\
**Replies:** 0\
**Last updated:** [October 13, 2021, 11:17am UTC](https://discourse.julialang.org/t/ci-tests-failing-on-windows-passing-on-other-os-while-using-github-actions/69677 "2021-10-13T11:17:20Z")

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I have submitted this pr and this one where the tests are failing on windows without being initiated at all. I just see a message saying “This check failed” in the log. Is there some issue with the windows machines that…

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## [Julia vs Fortran speed](https://discourse.julialang.org/t/julia-vs-fortran-speed/69654)

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**Author:** [@lancejnelson](https://discourse.julialang.org/u/lancejnelson)\
**Replies:** 5\
**Last updated:** [October 13, 2021, 11:13am UTC](https://discourse.julialang.org/t/julia-vs-fortran-speed/69654 "2021-10-13T11:13:08Z")

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A friend of mine wanted to check the speed of Julia vs a compiled language like C++ or Fortran. So he wrote a simple routine in Julia to invert a matrix. Then he compiled a Fortran code to do the same. Compiler flags wer…

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## [Pluto slides pdf print](https://discourse.julialang.org/t/pluto-slides-pdf-print/69459)

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**Author:** [@ess3sq](https://discourse.julialang.org/u/ess3sq)\
**Replies:** 4\
**Last updated:** [October 13, 2021, 10:53am UTC](https://discourse.julialang.org/t/pluto-slides-pdf-print/69459 "2021-10-13T10:53:51Z")

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So I would like to produce some slides using Pluto.jl. Interestingly enough, some kind of interactive slide show can be produced from a Pluto notebook using the comment on the issue linked on this post. The only proble…

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## [Nbdev for julia](https://discourse.julialang.org/t/nbdev-for-julia/32450)

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**Author:** [@nmoran](https://discourse.julialang.org/u/nmoran)\
**Replies:** 26\
**Last updated:** [October 13, 2021, 10:15am UTC](https://discourse.julialang.org/t/nbdev-for-julia/32450 "2021-10-13T10:15:36Z")

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Wondering if there is anything with similar functionality as nbdev (https://github.com/fastai/nbdev) for Julia or if it might make sense to get this working for Julia?

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## [Nested cross-validation](https://discourse.julialang.org/t/nested-cross-validation/65089)

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**Author:** [@rikh](https://discourse.julialang.org/u/rikh)\
**Replies:** 3\
**Last updated:** [October 13, 2021, 9:45am UTC](https://discourse.julialang.org/t/nested-cross-validation/65089 "2021-10-13T09:45:21Z")

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For my PhD, I’m mainly dealing with data containing 10 to 20 features and sample sizes of about 100 to 500. According to quite some literature, cross-validation (CV) is biased and should be replaced by nested cross-valid…

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## [Differential Equations: resolving instability in ODE problem](https://discourse.julialang.org/t/differential-equations-resolving-instability-in-ode-problem/69671)

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**Author:** [@spinystellate](https://discourse.julialang.org/u/spinystellate)\
**Replies:** 1\
**Last updated:** [October 13, 2021, 9:29am UTC](https://discourse.julialang.org/t/differential-equations-resolving-instability-in-ode-problem/69671 "2021-10-13T09:29:22Z")

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I am trying to transfer a Matlab model to Julia, but am running into instability issues. I have found this discussion: \[Handling Instability When Solving ODE Problems\] and tried some of the suggested actions, but am st…

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## [Unexpected behaviour when interrupting pmap](https://discourse.julialang.org/t/unexpected-behaviour-when-interrupting-pmap/69668)

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**Author:** [@albheim](https://discourse.julialang.org/u/albheim)\
**Replies:** 0\
**Last updated:** [October 13, 2021, 8:33am UTC](https://discourse.julialang.org/t/unexpected-behaviour-when-interrupting-pmap/69668 "2021-10-13T08:33:07Z")

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I had a problem where I wanted to gracefully stop the execution of long running distributed jobs and return the data collected so far, and I ran into some behaviour for pmap that I found a bit odd. A small example of a …

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## [Full Win32API headers and bindings for Julia (WIP)](https://discourse.julialang.org/t/full-win32api-headers-and-bindings-for-julia-wip/69657)

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**Author:** [@Chris\_Green](https://discourse.julialang.org/u/Chris_Green)\
**Replies:** 2\
**Last updated:** [October 13, 2021, 8:11am UTC](https://discourse.julialang.org/t/full-win32api-headers-and-bindings-for-julia-wip/69657 "2021-10-13T08:11:26Z")

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Hi. I have just started programming in Julia. I needed access to some WIN32 APIs so that I could deal with some threading issues in the Julia runtime. I got tired of making manual definitions, and banged out a really ba…

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## [Derivative of a registered function](https://discourse.julialang.org/t/derivative-of-a-registered-function/69656)

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**Author:** [@PikaPei](https://discourse.julialang.org/u/PikaPei)\
**Replies:** 2\
**Last updated:** [October 13, 2021, 7:03am UTC](https://discourse.julialang.org/t/derivative-of-a-registered-function/69656 "2021-10-13T07:03:27Z")

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I want to compute some Jacobian matrix and get the numerical value. However, if I registered the user-defined function, I can’t get the result. For example, before @register: using ModelingToolkit @parameters t D = D…

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## [How to handle interdependent unregistered packages?](https://discourse.julialang.org/t/how-to-handle-interdependent-unregistered-packages/69651)

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**Author:** [@georgematheos](https://discourse.julialang.org/u/georgematheos)\
**Replies:** 3\
**Last updated:** [October 13, 2021, 6:17am UTC](https://discourse.julialang.org/t/how-to-handle-interdependent-unregistered-packages/69651 "2021-10-13T06:17:35Z")

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I’ve been running into difficulties with setting up Julia dependency structures including multiple Julia packages, and am hoping for advice on how to proceed. After some experimentation, it appears to me that Julia’s pa…

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## [AsVector is impressive why it's not implemented yet](https://discourse.julialang.org/t/asvector-is-impressive-why-its-not-implemented-yet/69500)

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**Author:** [@xinchin](https://discourse.julialang.org/u/xinchin)\
**Replies:** 2\
**Last updated:** [October 13, 2021, 5:14am UTC](https://discourse.julialang.org/t/asvector-is-impressive-why-its-not-implemented-yet/69500 "2021-10-13T05:14:22Z")

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I come up across this issue https://github.com/JuliaData/DataFrames.jl/issues/2440 and I was amazed by the idea and the capability of Julia language. I learnt a lot from the code, but wonder why it is not implemented y…

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## [TextModels PoSTagger error due to Flux.jl](https://discourse.julialang.org/t/textmodels-postagger-error-due-to-flux-jl/69514)

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**Author:** [@Maxim\_Lubov](https://discourse.julialang.org/u/Maxim_Lubov)\
**Replies:** 3\
**Last updated:** [October 13, 2021, 3:44am UTC](https://discourse.julialang.org/t/textmodels-postagger-error-due-to-flux-jl/69514 "2021-10-13T03:44:39Z")

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I have a problem with TextAnalysis PoSTagger. When I try to load PoSTagger: pos = PoSTagger() the following error occurs: ERROR: LoadError: MethodError: no method matching Flux.Conv(::typeof(identity), ::Array{Float3…

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## [Visual bug with CairoMakie in Notebooks](https://discourse.julialang.org/t/visual-bug-with-cairomakie-in-notebooks/69436)

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**Author:** [@jedforrest](https://discourse.julialang.org/u/jedforrest)\
**Replies:** 3\
**Last updated:** [October 13, 2021, 3:28am UTC](https://discourse.julialang.org/t/visual-bug-with-cairomakie-in-notebooks/69436 "2021-10-13T03:28:22Z")

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Hi, I think I found a very specific rendering bug when using CairoMakie and Julia Notebooks. Running the following code in successive notebook cells produces the rendering error in the second plot. The orange line in t…

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## [How to deal with more threads than requested?](https://discourse.julialang.org/t/how-to-deal-with-more-threads-than-requested/69655)

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**Author:** [@Joris\_Pinkse](https://discourse.julialang.org/u/Joris_Pinkse)\
**Replies:** 1\
**Last updated:** [October 13, 2021, 2:17am UTC](https://discourse.julialang.org/t/how-to-deal-with-more-threads-than-requested/69655 "2021-10-13T02:17:36Z")

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I have a program that I instruct to use the 32 physical cores on a machine. But the program typically uses 37 or 38, presumably due to BLAS being used by one of the loaded packages. As a general rule, would it be faste…

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## [Fast Plotting Library](https://discourse.julialang.org/t/fast-plotting-library/69648)

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**Author:** [@ess3sq](https://discourse.julialang.org/u/ess3sq)\
**Replies:** 3\
**Last updated:** [October 12, 2021, 11:27pm UTC](https://discourse.julialang.org/t/fast-plotting-library/69648 "2021-10-12T23:27:01Z")

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Hello there, I am trying to find the fastest plotting library. With fast, I don’t mean quick at plotting thousands of points, but fast to load. I need to make a couple histograms with a few dozen data points, nothing fa…

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