# Latest

**URL:** https://discourse.julialang.org/latest.md?page=668

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

**Page:** 669

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## [Unicode: a bad idea, in general](https://discourse.julialang.org/t/unicode-a-bad-idea-in-general/99897)

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**Author:** [@PetrKryslUCSD](https://discourse.julialang.org/u/PetrKryslUCSD)\
**Replies:** 83\
**Last updated:** [June 17, 2023, 3:47am UTC](https://discourse.julialang.org/t/unicode-a-bad-idea-in-general/99897 "2023-06-17T03:47:38Z")

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Can you find the \\rho? And not confuse it with p?

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## [Filling text! from observable Array](https://discourse.julialang.org/t/filling-text-from-observable-array/100435)

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**Author:** [@sransome](https://discourse.julialang.org/u/sransome)\
**Replies:** 2\
**Last updated:** [June 17, 2023, 2:46am UTC](https://discourse.julialang.org/t/filling-text-from-observable-array/100435 "2023-06-17T02:46:01Z")

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Hi, I’m using Makie and need to display a lot of text in a plot and have been using a number of observable vectors to improve performance. However, I ran into syncronization problems when the length of the vectors chan…

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## [How to update Julia 1.8.x to 1.9.x](https://discourse.julialang.org/t/how-to-update-julia-1-8-x-to-1-9-x/100261)

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**Author:** [@kevinqiao](https://discourse.julialang.org/u/kevinqiao)\
**Replies:** 3\
**Last updated:** [June 17, 2023, 2:22am UTC](https://discourse.julialang.org/t/how-to-update-julia-1-8-x-to-1-9-x/100261 "2023-06-17T02:22:19Z")

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Hi there, I’m currently using Julia 1.8.2 on Windows 10 platform, and I wonder how to update Julia to 1.9.1 without re-install my packages, e.g., JuMP, etc. And I don’t like there are several Julia versions on my PC. So…

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## [Shading interval in density plot](https://discourse.julialang.org/t/shading-interval-in-density-plot/100260)

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**Author:** [@eljfe](https://discourse.julialang.org/u/eljfe)\
**Replies:** 2\
**Last updated:** [June 17, 2023, 1:58am UTC](https://discourse.julialang.org/t/shading-interval-in-density-plot/100260 "2023-06-17T01:58:45Z")

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Hi, Per the title of the post, trying to figure out how to shade a density plot interval using StatsPlots I don’t really have any usable example code. A couple of days playing with this and none the wiser. Trying to …

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## [Solving differential equations with uncertain parameters](https://discourse.julialang.org/t/solving-differential-equations-with-uncertain-parameters/100059)

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**Author:** [@lmg](https://discourse.julialang.org/u/lmg)\
**Replies:** 8\
**Last updated:** [June 16, 2023, 11:31pm UTC](https://discourse.julialang.org/t/solving-differential-equations-with-uncertain-parameters/100059 "2023-06-16T23:31:33Z")

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Hello everybody, I would like to solve IVPs with uncertain but bounded parameters. To achieve this, my plan was to use the Interval data type from the IntervalArithmetic.jl package. In this post on custom number types, …

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## [Troubles with Julia and VSCode](https://discourse.julialang.org/t/troubles-with-julia-and-vscode/100432)

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**Author:** [@Murilo\_Poloi](https://discourse.julialang.org/u/Murilo_Poloi)\
**Replies:** 13\
**Last updated:** [June 16, 2023, 11:02pm UTC](https://discourse.julialang.org/t/troubles-with-julia-and-vscode/100432 "2023-06-16T23:02:38Z")

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Basically I’m having trouble using Julia in VSCode with the whole “Could not start the Julia language server. Make sure the julia.executablePath setting points to the Julia binary.” and “Cannot read properties of undefin…

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## [Can constant propagation transform integer powers of -1 to an if/else?](https://discourse.julialang.org/t/can-constant-propagation-transform-integer-powers-of-1-to-an-if-else/100462)

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**Author:** [@jishnub](https://discourse.julialang.org/u/jishnub)\
**Replies:** 5\
**Last updated:** [June 16, 2023, 10:01pm UTC](https://discourse.julialang.org/t/can-constant-propagation-transform-integer-powers-of-1-to-an-if-else/100462 "2023-06-16T22:01:11Z")

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julia\> @btime (n -\> \[iseven(k) ? 1 : (-1) for k in 1:n\])(500); 890.571 ns (1 allocation: 4.06 KiB) julia\> @btime (n -\> \[(-1)^k for k in 1:n\])(500); 6.170 μs (1 allocation: 4.06 KiB) It would be great if the latter …

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## [Detect if constant](https://discourse.julialang.org/t/detect-if-constant/100246)

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**Author:** [@user664303](https://discourse.julialang.org/u/user664303)\
**Replies:** 49\
**Last updated:** [June 16, 2023, 8:12pm UTC](https://discourse.julialang.org/t/detect-if-constant/100246 "2023-06-16T20:12:17Z")

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Is there a way to test or detect whether a value (let’s say an Int) is constant (i.e. known to the compiler) at runtime? This has been asked before, but not often and not recently. I’m just wondering if this is now possi…

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## [Is that possible to specify dimensions in gemm?](https://discourse.julialang.org/t/is-that-possible-to-specify-dimensions-in-gemm/100433)

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**Author:** [@Nellatur](https://discourse.julialang.org/u/Nellatur)\
**Replies:** 3\
**Last updated:** [June 16, 2023, 7:39pm UTC](https://discourse.julialang.org/t/is-that-possible-to-specify-dimensions-in-gemm/100433 "2023-06-16T19:39:01Z")

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In Linear Algebra · The Julia Language gemm has fewer entries than LAPACK: dgemm, e.g., dimensions of matrices A and B. Specifying dimensions sometimes can let higher dimensional arrays look like matrices arrays - How …

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## [Any speed improvements to the implementation of \`BiRank\`?](https://discourse.julialang.org/t/any-speed-improvements-to-the-implementation-of-birank/100305)

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**Author:** [@danielw2904](https://discourse.julialang.org/u/danielw2904)\
**Replies:** 15\
**Last updated:** [June 16, 2023, 7:22pm UTC](https://discourse.julialang.org/t/any-speed-improvements-to-the-implementation-of-birank/100305 "2023-06-16T19:22:41Z")

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Hi All, I implemented the paper BiRank: Towards Ranking on Bipartite Graphs in Julia (R and Python implementations already exist here). I was wondering if there are any obvious performance problems I missed? I noticed …

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## [Is this a valid use of simd?](https://discourse.julialang.org/t/is-this-a-valid-use-of-simd/100463)

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**Author:** [@danielw2904](https://discourse.julialang.org/u/danielw2904)\
**Replies:** 2\
**Last updated:** [June 16, 2023, 6:26pm UTC](https://discourse.julialang.org/t/is-this-a-valid-use-of-simd/100463 "2023-06-16T18:26:57Z")

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I am trying to calculate the sum of the absolute differences between two vectors without allocation. I have no experience with @simd but was wondering if this is a correct use: function sum\_absdiff(x::Vector{T}, y::Vect…

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## [Using UODE in Lotka-Volterra for multiple species](https://discourse.julialang.org/t/using-uode-in-lotka-volterra-for-multiple-species/100146)

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**Author:** [@James\_Fernandez](https://discourse.julialang.org/u/James_Fernandez)\
**Replies:** 6\
**Last updated:** [June 16, 2023, 5:32pm UTC](https://discourse.julialang.org/t/using-uode-in-lotka-volterra-for-multiple-species/100146 "2023-06-16T17:32:44Z")

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Hello everyone, I am brand new to Julia, machine learning and sciML so forgive me if I still don’t have the technical jargon. I have read through Automatically Discover Missing Physics by Embedding Machine Learning int…

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## [Problems with installation and configuration of \`PythonCall.jl\`](https://discourse.julialang.org/t/problems-with-installation-and-configuration-of-pythoncall-jl/100460)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 1\
**Last updated:** [June 16, 2023, 5:31pm UTC](https://discourse.julialang.org/t/problems-with-installation-and-configuration-of-pythoncall-jl/100460 "2023-06-16T17:31:27Z")

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I added PythonCall.jl and CondaPkg.jl in my Julia REPL’s pkg mode. I already have Miniconda in my system (Win10) and I want PythonCall and CondaPkg to use my preinstalled Miniconda instead of downloading a new one. So …

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## [Mixing blocking MPI communication and Julia concurrency](https://discourse.julialang.org/t/mixing-blocking-mpi-communication-and-julia-concurrency/100458)

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**Author:** [@lweber](https://discourse.julialang.org/u/lweber)\
**Replies:** 0\
**Last updated:** [June 16, 2023, 4:46pm UTC](https://discourse.julialang.org/t/mixing-blocking-mpi-communication-and-julia-concurrency/100458 "2023-06-16T16:46:51Z")

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Hi Julia users, I have the following problem. I have an MPI code with a controller/worker architecture: one process distributes and coordinates work across a bunch of worker processes. This is implemented using blocking…

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## [ImageEdgeDetection.jl: Upto Sub-Pixel Precision](https://discourse.julialang.org/t/imageedgedetection-jl-upto-sub-pixel-precision/100456)

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**Author:** [@Ashwani\_Rathee](https://discourse.julialang.org/u/Ashwani_Rathee)\
**Replies:** 0\
**Last updated:** [June 16, 2023, 4:30pm UTC](https://discourse.julialang.org/t/imageedgedetection-jl-upto-sub-pixel-precision/100456 "2023-06-16T16:30:33Z")

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ImageEdgeDetection.jl ImageEdgeDetection.jl is a Julia package for determining image edges (up to subpixel precision) and ascertaining the gradient/edge orientations. It provides edge detection algorithms like Canny an…

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## [Catlab.jl : Facing error while creating simple graphs](https://discourse.julialang.org/t/catlab-jl-facing-error-while-creating-simple-graphs/100415)

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**Author:** [@nikit\_goku](https://discourse.julialang.org/u/nikit_goku)\
**Replies:** 5\
**Last updated:** [June 16, 2023, 4:15pm UTC](https://discourse.julialang.org/t/catlab-jl-facing-error-while-creating-simple-graphs/100415 "2023-06-16T16:15:23Z")

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I was following the AlgebraicJulia blog for Graphs and C-sets where I am encountering an IOError for the ‘dot -Tsvg’ file missing when trying to generate graph interface using the 'to\_graphviz() function. I could not deb…

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## [Transition matrix of multiple-dimensional state and sparse array](https://discourse.julialang.org/t/transition-matrix-of-multiple-dimensional-state-and-sparse-array/100453)

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**Author:** [@Zerosum](https://discourse.julialang.org/u/Zerosum)\
**Replies:** 2\
**Last updated:** [June 16, 2023, 4:12pm UTC](https://discourse.julialang.org/t/transition-matrix-of-multiple-dimensional-state-and-sparse-array/100453 "2023-06-16T16:12:07Z")

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I was wondering if I could get some help with my problem. Suppose I have a four-dimensional state space (x,y,z,w), and the number of grid points in each state space is (30,60,90,120). I have a function f:(x,y,z,w) \\righ…

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## [ImageView.jl: Visualization and Analysis of Images](https://discourse.julialang.org/t/imageview-jl-visualization-and-analysis-of-images/100455)

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**Author:** [@Ashwani\_Rathee](https://discourse.julialang.org/u/Ashwani_Rathee)\
**Replies:** 1\
**Last updated:** [June 16, 2023, 3:56pm UTC](https://discourse.julialang.org/t/imageview-jl-visualization-and-analysis-of-images/100455 "2023-06-16T15:56:15Z")

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ImageView.jl ImageView.jl is a Julia package designed for efficient and flexible image visualization. Features: Rubberband selection to view a specific region of interest using ctrl-click with drag on ROI. It makes v…

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## [Unregistered sub-packages in a registered main-package](https://discourse.julialang.org/t/unregistered-sub-packages-in-a-registered-main-package/100442)

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**Author:** [@imre](https://discourse.julialang.org/u/imre)\
**Replies:** 3\
**Last updated:** [June 16, 2023, 2:45pm UTC](https://discourse.julialang.org/t/unregistered-sub-packages-in-a-registered-main-package/100442 "2023-06-16T14:45:32Z")

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Hi, I would like to create a package (which will be registered at some point), which contains multiple unregistered sub-packages. I’m aware that I can add unregistered sub-packages to my main package via dev in the pack…

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## [Inferring parameters with noisy data in Turing](https://discourse.julialang.org/t/inferring-parameters-with-noisy-data-in-turing/100452)

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**Author:** [@Sahil\_Khan](https://discourse.julialang.org/u/Sahil_Khan)\
**Replies:** 0\
**Last updated:** [June 16, 2023, 2:30pm UTC](https://discourse.julialang.org/t/inferring-parameters-with-noisy-data-in-turing/100452 "2023-06-16T14:30:52Z")

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I have 3 models with total 10 parameters. Data I’m using is very noisy and for each set parameters’s particle or i should say for each iteration, it requires to simulate models for 24 times to get required output to be f…

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## [Vim mode in REPL command line](https://discourse.julialang.org/t/vim-mode-in-repl-command-line/9023)

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**Author:** [@pasha](https://discourse.julialang.org/u/pasha)\
**Replies:** 31\
**Last updated:** [June 16, 2023, 1:37pm UTC](https://discourse.julialang.org/t/vim-mode-in-repl-command-line/9023 "2023-06-16T13:37:34Z")

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I’m not talking about a julia mode for vim - that exists and is lovely. I’m talking about the command line in the REPL - so that when you can escape partway into a long command you can use vim-flavored actions to change…

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## [Can Julia achieve fine grained control of performance without sacrificing ease of use?](https://discourse.julialang.org/t/can-julia-achieve-fine-grained-control-of-performance-without-sacrificing-ease-of-use/100437)

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**Author:** [@Tarny\_GG\_Channie](https://discourse.julialang.org/u/Tarny_GG_Channie)\
**Replies:** 14\
**Last updated:** [June 16, 2023, 1:31pm UTC](https://discourse.julialang.org/t/can-julia-achieve-fine-grained-control-of-performance-without-sacrificing-ease-of-use/100437 "2023-06-16T13:31:53Z")

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Julia was designed to have a good overall performance, being llvm-compiled with a good type inference. However, Julia has some subtle issues when fine-grained control over the inner working is needed, for example… -Wha…

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## [New version of BifurcationKit](https://discourse.julialang.org/t/new-version-of-bifurcationkit/100424)

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**Author:** [@rveltz](https://discourse.julialang.org/u/rveltz)\
**Replies:** 2\
**Last updated:** [June 16, 2023, 12:43pm UTC](https://discourse.julialang.org/t/new-version-of-bifurcationkit/100424 "2023-06-16T12:43:17Z")

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Dear all, I am glad to report a new version of BifurcationKit (BK). It has been a long time since I report progress on this library, this one is a massive one. Before I start, I would like to highlight the fact that a …

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## [Integro-DDE that includes integral over delta function](https://discourse.julialang.org/t/integro-dde-that-includes-integral-over-delta-function/100429)

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**Author:** [@rogue26](https://discourse.julialang.org/u/rogue26)\
**Replies:** 2\
**Last updated:** [June 16, 2023, 12:36pm UTC](https://discourse.julialang.org/t/integro-dde-that-includes-integral-over-delta-function/100429 "2023-06-16T12:36:07Z")

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Hi everyone. I’ve solved some DDE systems in Julia, but I’m stumped on my latest problem. I’m not sure if this is a math question or a Julia question, but I’d appreciate any guidance you can provide. How would you go ab…

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## [ERROR: MethodError: no method matching \*(::ForwardDiff.Dual{ForwardDiff.Tag{Pumas.Tag, Float64}, Float64, 6}, ::typeof(time))](https://discourse.julialang.org/t/error-methoderror-no-method-matching-forwarddiff-dual-forwarddiff-tag-pumas-tag-float64-float64-6-typeof-time/100419)

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**Author:** [@Valdeene\_Santos](https://discourse.julialang.org/u/Valdeene_Santos)\
**Replies:** 2\
**Last updated:** [June 16, 2023, 12:32pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-forwarddiff-dual-forwarddiff-tag-pumas-tag-float64-float64-6-typeof-time/100419 "2023-06-16T12:32:11Z")

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During the pharmacodynamic data run (in vitro test with constant concentrations) this error appeared and I cannot identify what could have happened. Can someone help me ? model = @model begin @param begin tvk ∈ Rea…

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## [Error due to Dirichlet prior in Turing?](https://discourse.julialang.org/t/error-due-to-dirichlet-prior-in-turing/100244)

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**Author:** [@JanG](https://discourse.julialang.org/u/JanG)\
**Replies:** 9\
**Last updated:** [June 16, 2023, 11:56am UTC](https://discourse.julialang.org/t/error-due-to-dirichlet-prior-in-turing/100244 "2023-06-16T11:56:49Z")

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Hi, This model below crashes for me with the error message LoadError: DomainError with Dual{ForwardDiff.Tag{Turing.TuringTag, Float64}}(NaN,NaN,NaN): Bernoulli: the condition zero(p) \<= p \<= one(p) is not satisfied. us…

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## [NUTS warmup](https://discourse.julialang.org/t/nuts-warmup/100438)

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**Author:** [@Sahil\_Khan](https://discourse.julialang.org/u/Sahil_Khan)\
**Replies:** 0\
**Last updated:** [June 16, 2023, 8:24am UTC](https://discourse.julialang.org/t/nuts-warmup/100438 "2023-06-16T08:24:21Z")

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How much I understood is in NUTS(burnin, acceptance rate) burnin is warmup period where it look for leap-frog steps and step size or I am wrong? Because I wanted to ask if i set NUTS(0,0.65) and remove initial iteration…

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## [Makie - save specific axis only](https://discourse.julialang.org/t/makie-save-specific-axis-only/65962)

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**Author:** [@keithjlee](https://discourse.julialang.org/u/keithjlee)\
**Replies:** 2\
**Last updated:** [June 16, 2023, 8:16am UTC](https://discourse.julialang.org/t/makie-save-specific-axis-only/65962 "2023-06-16T08:16:26Z")

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I have a plotting function that allows for a bit of interactivity, but I’d like to be able to exclude the toggles/sliders when I’m saving the figure, which is an LScene() type in position \[1,1\] of my GridLayout. I wo…

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## [PackageCompiler: cpu\_target silently fails to create image for specified architecture](https://discourse.julialang.org/t/packagecompiler-cpu-target-silently-fails-to-create-image-for-specified-architecture/99954)

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**Author:** [@nrontsis](https://discourse.julialang.org/u/nrontsis)\
**Replies:** 4\
**Last updated:** [June 16, 2023, 8:10am UTC](https://discourse.julialang.org/t/packagecompiler-cpu-target-silently-fails-to-create-image-for-specified-architecture/99954 "2023-06-16T08:10:41Z")

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I am trying to build a system image for a package. The system image is built in a different machine than the one that it runs on. For efficiency reasons I want to be able to build for the cpu type of the target which is…

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## [How to save an matrix to use in a separate script](https://discourse.julialang.org/t/how-to-save-an-matrix-to-use-in-a-separate-script/96518)

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**Author:** [@dan\_tud](https://discourse.julialang.org/u/dan_tud)\
**Replies:** 4\
**Last updated:** [June 16, 2023, 7:19am UTC](https://discourse.julialang.org/t/how-to-save-an-matrix-to-use-in-a-separate-script/96518 "2023-06-16T07:19:35Z")

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Hi All, Apologies if this has been asked, however, I haven’t been able to find a simple answer. I have a matrix of solutions which I would like to save and then load into another script for plotting and some analysis. M…

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