# Latest

**URL:** https://discourse.julialang.org/latest.md?page=127

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

**Page:** 128

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## [Plots with PlotlyJS error](https://discourse.julialang.org/t/plots-with-plotlyjs-error/131303)

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**Author:** [@Jake](https://discourse.julialang.org/u/Jake)\
**Replies:** 4\
**Last updated:** [August 2, 2025, 7:31pm UTC](https://discourse.julialang.org/t/plots-with-plotlyjs-error/131303 "2025-08-02T19:31:52Z")

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I am trying to use Plots with the PlotlyJS backend. Using 1.11.6 on Win 11 my code snippet is: using Plots using PlotlyKaleido using PlotlyJS plotlyjs() I get this message: Precompiling PlotlyJS... Info Given Plotly…

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## [How to tweak PolarAxis?](https://discourse.julialang.org/t/how-to-tweak-polaraxis/131286)

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**Author:** [@vladdez](https://discourse.julialang.org/u/vladdez)\
**Replies:** 2\
**Last updated:** [August 2, 2025, 3:14pm UTC](https://discourse.julialang.org/t/how-to-tweak-polaraxis/131286 "2025-08-02T15:14:30Z")

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Two things I would like to clarify: How to remove these empty areas marked by red How to correctly put labels at their places: at least put ylabel tilted. As you see I used dummy axis, because PolarAxis can not put the…

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## [Conversion of inner "flag" type parameters from supertype "flag" type parameters for composite struct construcor](https://discourse.julialang.org/t/conversion-of-inner-flag-type-parameters-from-supertype-flag-type-parameters-for-composite-struct-construcor/131306)

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**Author:** [@kunzaatko](https://discourse.julialang.org/u/kunzaatko)\
**Replies:** 3\
**Last updated:** [August 2, 2025, 1:08pm UTC](https://discourse.julialang.org/t/conversion-of-inner-flag-type-parameters-from-supertype-flag-type-parameters-for-composite-struct-construcor/131306 "2025-08-02T13:08:17Z")

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I have a type structure that looks something like this: abstract type AbstractA{T} end struct A1{T} \<: AbstractA{T} end # no field of type \`T\` A1() = A1{Any}() struct A2{T} \<: AbstractA{T} end A2() = A2{Any}() and I wo…

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## [Callback in DifferentialEquation.jl changes the \`p\` parameter vector. Is this expected behaviour?](https://discourse.julialang.org/t/callback-in-differentialequation-jl-changes-the-p-parameter-vector-is-this-expected-behaviour/131273)

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**Author:** [@Vitor\_Patricio\_Canta](https://discourse.julialang.org/u/Vitor_Patricio_Canta)\
**Replies:** 3\
**Last updated:** [August 2, 2025, 9:33am UTC](https://discourse.julialang.org/t/callback-in-differentialequation-jl-changes-the-p-parameter-vector-is-this-expected-behaviour/131273 "2025-08-02T09:33:06Z")

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This is a MWE showing that p defined outside of the integrator is also modified by the callback. Is this expected behaviour? Thanks, using OrdinaryDiffEq function rhs(du, u, p, t) V, Q, c\_in = p c = u\[1\] d…

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## [Custom ForwardDiff rule for ternary function](https://discourse.julialang.org/t/custom-forwarddiff-rule-for-ternary-function/131257)

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**Author:** [@jbrea](https://discourse.julialang.org/u/jbrea)\
**Replies:** 2\
**Last updated:** [August 2, 2025, 8:38am UTC](https://discourse.julialang.org/t/custom-forwarddiff-rule-for-ternary-function/131257 "2025-08-02T08:38:49Z")

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I’m trying to define a custom ForwardDiff.jl differentiation rule for the bivariate normal cumulative function BvN(h, k, r). What I did so far works for first derivatives, but it doesn’t work for mixed higher derivatives…

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## [Possible to make a specific parameterization into a subtype?](https://discourse.julialang.org/t/possible-to-make-a-specific-parameterization-into-a-subtype/84260)

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**Author:** [@Stephen\_Vavasis](https://discourse.julialang.org/u/Stephen_Vavasis)\
**Replies:** 2\
**Last updated:** [August 1, 2025, 9:02pm UTC](https://discourse.julialang.org/t/possible-to-make-a-specific-parameterization-into-a-subtype/84260 "2025-08-01T21:02:21Z")

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In the master branch of DataStructures.jl, I have written new iteration methods for the three sorted containers, SortedSet, SortedDict, and SortedMultiDict. The main structure that defines an iteration is: struct Itera…

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## [Plotting in a different process](https://discourse.julialang.org/t/plotting-in-a-different-process/131300)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 2\
**Last updated:** [August 1, 2025, 8:43pm UTC](https://discourse.julialang.org/t/plotting-in-a-different-process/131300 "2025-08-01T20:43:37Z")

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I want to start a second Julia process with using DistributedNext addprocs(1) and use a plotting library, like @everywhere using ControlPlots (or Plots or whatever you prefer) How can I now create a plot in the seco…

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## [Multithreading with GC fails](https://discourse.julialang.org/t/multithreading-with-gc-fails/131269)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 8\
**Last updated:** [August 1, 2025, 7:28am UTC](https://discourse.julialang.org/t/multithreading-with-gc-fails/131269 "2025-08-01T07:28:03Z")

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I have the following function: function getMeasurementsP(mx, my, nM, zh, wf::WindFarm, set::Settings, floris::Floris, wind::Wind) size\_mx = size(mx) mz = zeros(size\_mx\[1\], size\_mx\[2\], nM) # Create threa…

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## [\[ANN\] ExpandNestedData.jl](https://discourse.julialang.org/t/ann-expandnesteddata-jl/99944)

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**Author:** [@mrufsvold](https://discourse.julialang.org/u/mrufsvold)\
**Replies:** 2\
**Last updated:** [August 1, 2025, 6:45pm UTC](https://discourse.julialang.org/t/ann-expandnesteddata-jl/99944 "2025-08-01T18:45:03Z")

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ExpandNestedData.jl is in the process of being registered! Do you wish you could see your JSON data as a table? How about XML? Or a struct of structs? If so, ExpandNestedData is the tool for you. Just pass your object t…

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## [Interesting behaviour with parametric types in inner constructors](https://discourse.julialang.org/t/interesting-behaviour-with-parametric-types-in-inner-constructors/131290)

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**Author:** [@jonas-pueschel](https://discourse.julialang.org/u/jonas-pueschel)\
**Replies:** 1\
**Last updated:** [August 1, 2025, 2:02pm UTC](https://discourse.julialang.org/t/interesting-behaviour-with-parametric-types-in-inner-constructors/131290 "2025-08-01T14:02:00Z")

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Hi all, I recently stumbled over an interesting behaviour regarding parametric types used in inner constructors. The short version is, that this code struct TestStruct1{Tx\<:Integer,Ty\<:Float64} x::Tx y::Ty …

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## [Lollipopt project (Probably not working so don't take it seriously.)](https://discourse.julialang.org/t/lollipopt-project-probably-not-working-so-dont-take-it-seriously/131199)

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**Author:** [@Tarny\_GG\_Channie](https://discourse.julialang.org/u/Tarny_GG_Channie)\
**Replies:** 4\
**Last updated:** [August 1, 2025, 11:51am UTC](https://discourse.julialang.org/t/lollipopt-project-probably-not-working-so-dont-take-it-seriously/131199 "2025-08-01T11:51:19Z")

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You have a mixed-integer linear programming problem. You’re tired of free solvers being like 100x slower than commercial solvers, right? I think I found the culprit. It’s hard to contribute to free solvers despite them…

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## [Thread setup time eating up all parallel improvement?](https://discourse.julialang.org/t/thread-setup-time-eating-up-all-parallel-improvement/131214)

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**Author:** [@JJMerelo](https://discourse.julialang.org/u/JJMerelo)\
**Replies:** 21\
**Last updated:** [August 1, 2025, 9:16am UTC](https://discourse.julialang.org/t/thread-setup-time-eating-up-all-parallel-improvement/131214 "2025-08-01T09:16:31Z")

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Hi, Just experimenting a bit with parallel execution, using this example here, a straightforward parallel-and-collect results. The issue here is that it’s not really improving wallclock time, although it’s spending le…

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## [JuliaCon Online @ PyData Global 2025](https://discourse.julialang.org/t/juliacon-online-pydata-global-2025/131270)

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**Author:** [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Replies:** 1\
**Last updated:** [August 1, 2025, 7:12am UTC](https://discourse.julialang.org/t/juliacon-online-pydata-global-2025/131270 "2025-08-01T07:12:28Z")

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PyData Global 2025 is a completely virtual event hosted on an online platform. PyData communities approach data science using many languages, including (but not limited to) Python, Julia, and R. The Call for Proposal…

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## [Julia Development Intern at Symbolic Mind](https://discourse.julialang.org/t/julia-development-intern-at-symbolic-mind/131262)

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**Author:** [@cscherrer](https://discourse.julialang.org/u/cscherrer)\
**Replies:** 1\
**Last updated:** [August 1, 2025, 12:48am UTC](https://discourse.julialang.org/t/julia-development-intern-at-symbolic-mind/131262 "2025-08-01T00:48:40Z")

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About the job Proficiency in Julia programming language is required, with hands-on experience in developing and optimizing Julia-based applications. We are looking for a talented and motivated Julia Development Intern w…

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## [Sparse matrix multiplication for Metal](https://discourse.julialang.org/t/sparse-matrix-multiplication-for-metal/131088)

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**Author:** [@Marco\_Lombardi](https://discourse.julialang.org/u/Marco_Lombardi)\
**Replies:** 15\
**Last updated:** [July 31, 2025, 5:59pm UTC](https://discourse.julialang.org/t/sparse-matrix-multiplication-for-metal/131088 "2025-07-31T17:59:44Z")

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I need to perform a multiplication between two fairly large sparse matrices C = A \* B and I would like to try using the GPU for that. The problem arises in a context where A represents a fixed 2D convolution kernel, whil…

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## [Unexpected allocations when passing types as arguments](https://discourse.julialang.org/t/unexpected-allocations-when-passing-types-as-arguments/131230)

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**Author:** [@zmorrell](https://discourse.julialang.org/u/zmorrell)\
**Replies:** 8\
**Last updated:** [July 31, 2025, 5:52pm UTC](https://discourse.julialang.org/t/unexpected-allocations-when-passing-types-as-arguments/131230 "2025-07-31T17:52:52Z")

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I have come across some somewhat unexpected behavior when passing types as arguments to a function. For reference, I am using the current Julia 1.10.10 (the current LTS). I am somewhat unclear what causes this behavior…

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## [Solving for transcendental equation](https://discourse.julialang.org/t/solving-for-transcendental-equation/131229)

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**Author:** [@lrnv](https://discourse.julialang.org/u/lrnv)\
**Replies:** 15\
**Last updated:** [July 31, 2025, 4:14pm UTC](https://discourse.julialang.org/t/solving-for-transcendental-equation/131229 "2025-07-31T16:14:16Z")

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Hi, I have the function f\_n(x) = e^x T\_n(x), where T\_n are Touchard’s polynomials. The function is bijective from R to R and everything is Ok, just that the inverse is unknown… It has the nice taylor exapnsion : f\_n(x)…

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## [Nested task error on Julia-1.12-rc1](https://discourse.julialang.org/t/nested-task-error-on-julia-1-12-rc1/131256)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 4\
**Last updated:** [July 31, 2025, 4:49pm UTC](https://discourse.julialang.org/t/nested-task-error-on-julia-1-12-rc1/131256 "2025-07-31T16:49:56Z")

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Any idea what is going on here? Enable multithreading · ufechner7/FLORIDyn.jl@f2175f3 · GitHub Testing Running tests... runFLORIDyn - online: Error During Test at /home/runner/work/FLORIDyn.jl/FLORIDyn.jl/test/tes…

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## [Converting Dict to DataFrames](https://discourse.julialang.org/t/converting-dict-to-dataframes/131248)

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**Author:** [@Snowy](https://discourse.julialang.org/u/Snowy)\
**Replies:** 4\
**Last updated:** [July 31, 2025, 4:42pm UTC](https://discourse.julialang.org/t/converting-dict-to-dataframes/131248 "2025-07-31T16:42:23Z")

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Hi all, I’m sure this is pretty simple but it’s tripping me up. Say I have a dictionary as such: using DataFrames using Dates Dates\_to\_remember = Dict(:Birthday=\> Set(\[ Date("2021-01-15"), Date("1991-08-30"),…

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## [JuliaHealth Meeting (Americas/Europe/Africa) – July 31st, 2025](https://discourse.julialang.org/t/juliahealth-meeting-americas-europe-africa-july-31st-2025/131250)

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**Author:** [@TheCedarPrince](https://discourse.julialang.org/u/TheCedarPrince)\
**Replies:** 0\
**Last updated:** [July 31, 2025, 2:00pm UTC](https://discourse.julialang.org/t/juliahealth-meeting-americas-europe-africa-july-31st-2025/131250 "2025-07-31T14:00:06Z")

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Hi folks! :waving\_hand: After a long hiatus, we are having our monthly JuliaHealth meeting today! I didn’t have time to make a slide deck for this month (JuliaCon and coming home kept me busy!) so we’ll keep things a bi…

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## [Help with reinterperating result of ccall](https://discourse.julialang.org/t/help-with-reinterperating-result-of-ccall/131227)

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**Author:** [@AwesomeQuest](https://discourse.julialang.org/u/AwesomeQuest)\
**Replies:** 8\
**Last updated:** [July 31, 2025, 1:28pm UTC](https://discourse.julialang.org/t/help-with-reinterperating-result-of-ccall/131227 "2025-07-31T13:28:32Z")

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So I have a function in a C library that returns a uint16\_t and I call it something like this (@ccall ".\\\\lib.dll".crc16()::UInt16) However, this gives the wrong result. But (@ccall ".\\\\lib.dll".crc16()::UInt16) |\> x…

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## [ProfileView warntype\_last() throws error](https://discourse.julialang.org/t/profileview-warntype-last-throws-error/131247)

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**Author:** [@Philippe\_Maincon1](https://discourse.julialang.org/u/Philippe_Maincon1)\
**Replies:** 0\
**Last updated:** [July 31, 2025, 12:29pm UTC](https://discourse.julialang.org/t/profileview-warntype-last-throws-error/131247 "2025-07-31T12:29:37Z")

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In Julia 1.11, looking to understand sources of type instability, I profile my code: ... # "diffed\_residual", and some variables defined here by a large code base: # no MVE using ProfileView using Profile out = …

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## [How to extract histogram from @benchmark results](https://discourse.julialang.org/t/how-to-extract-histogram-from-benchmark-results/131245)

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**Author:** [@JJMerelo](https://discourse.julialang.org/u/JJMerelo)\
**Replies:** 2\
**Last updated:** [July 31, 2025, 11:23am UTC](https://discourse.julialang.org/t/how-to-extract-histogram-from-benchmark-results/131245 "2025-07-31T11:23:35Z")

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How can we see the histogram results as shown in from the Julia prompt?

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## [Using the result of NonlinearSolve.jl allocates memory](https://discourse.julialang.org/t/using-the-result-of-nonlinearsolve-jl-allocates-memory/131242)

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**Author:** [@Gako](https://discourse.julialang.org/u/Gako)\
**Replies:** 3\
**Last updated:** [July 31, 2025, 10:41am UTC](https://discourse.julialang.org/t/using-the-result-of-nonlinearsolve-jl-allocates-memory/131242 "2025-07-31T10:41:09Z")

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I’m using the following code to try and understand how broadcasting and allocation work in Julia: using NonlinearSolve function nonlin() nonlinprob(x, p) = return x - 3 prob = NonlinearProblem(nonlinprob, 2.) …

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## [Using PyPlot vs Plots](https://discourse.julialang.org/t/using-pyplot-vs-plots/28313)

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**Author:** [@henry2004y](https://discourse.julialang.org/u/henry2004y)\
**Replies:** 8\
**Last updated:** [July 31, 2025, 10:40am UTC](https://discourse.julialang.org/t/using-pyplot-vs-plots/28313 "2025-07-31T10:40:38Z")

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Hi, When I first learned Julia, I was guided towards the Plots package for visualization. Even though it has multiple options of the backend libraries, I found it hard for me as a user who is more familiar with the MATL…

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## [Output of @benchmark to string or table?](https://discourse.julialang.org/t/output-of-benchmark-to-string-or-table/27977)

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**Author:** [@nmatzke](https://discourse.julialang.org/u/nmatzke)\
**Replies:** 3\
**Last updated:** [August 28, 2019, 2:20am UTC](https://discourse.julialang.org/t/output-of-benchmark-to-string-or-table/27977 "2019-08-28T02:20:15Z")

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Hi all! This is a very simple question but I can’t find an easy answer. Any help appreciated! I am trying to @benchmark the speed of a function over several orders-of-magnitude of inputs. I would like to just do a for-…

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## [JuliaCon 2025 Hackathon Ideas!](https://discourse.julialang.org/t/juliacon-2025-hackathon-ideas/130956)

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**Author:** [@TheCedarPrince](https://discourse.julialang.org/u/TheCedarPrince)\
**Replies:** 24\
**Last updated:** [July 31, 2025, 9:45am UTC](https://discourse.julialang.org/t/juliacon-2025-hackathon-ideas/130956 "2025-07-31T09:45:12Z")

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Hi folks! I was thinking about JuliaCon 2025 Hackathon ideas for this Saturday! Figured I would start a general Discourse post so everyone can post and peruse ideas. Feel free to share ideas below! ~ tcp …

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## [What tools do you use for plagiarism detection of code?](https://discourse.julialang.org/t/what-tools-do-you-use-for-plagiarism-detection-of-code/58693)

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**Author:** [@SL6Trip](https://discourse.julialang.org/u/SL6Trip)\
**Replies:** 2\
**Last updated:** [April 7, 2021, 9:05am UTC](https://discourse.julialang.org/t/what-tools-do-you-use-for-plagiarism-detection-of-code/58693 "2021-04-07T09:05:22Z")

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For those who are not familiar, the MOSS system is one of the most used tools when trying to detect plagiarism in source code submissions. The output format is given as a list of submission pairs, in descending order of …

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## [Idea: Mapping Dive Sites with Julia – A Chance to Show Off the Ecosystem](https://discourse.julialang.org/t/idea-mapping-dive-sites-with-julia-a-chance-to-show-off-the-ecosystem/131234)

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**Author:** [@andreeco](https://discourse.julialang.org/u/andreeco)\
**Replies:** 1\
**Last updated:** [July 31, 2025, 7:04am UTC](https://discourse.julialang.org/t/idea-mapping-dive-sites-with-julia-a-chance-to-show-off-the-ecosystem/131234 "2025-07-31T07:04:19Z")

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Hi all, I’ve been thinking about a practical and visually engaging way to highlight what Julia can do -especially when it comes to its growing ecosystem of packages. All over the world, some diving spots are described …

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## [\[ANN\] SignType.jl: What if Bool, but Sign](https://discourse.julialang.org/t/ann-signtype-jl-what-if-bool-but-sign/131182)

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**Author:** [@brainandforce](https://discourse.julialang.org/u/brainandforce)\
**Replies:** 7\
**Last updated:** [July 30, 2025, 8:53pm UTC](https://discourse.julialang.org/t/ann-signtype-jl-what-if-bool-but-sign/131182 "2025-07-30T20:53:10Z")

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Link to package: SignType.jl In a lot of the code I’ve been writing, I’ve needed to do sign manipulation, and in principle this can be done with Boolean values. However, I find this to be a bit of a mess - just because …

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