# Latest

**URL:** https://discourse.julialang.org/latest.md?page=251

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

**Page:** 252

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## [Anyone interested in developing QT for Julia](https://discourse.julialang.org/t/anyone-interested-in-developing-qt-for-julia/123973)

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**Author:** [@mpeters2](https://discourse.julialang.org/u/mpeters2)\
**Replies:** 0\
**Last updated:** [December 19, 2024, 1:21am UTC](https://discourse.julialang.org/t/anyone-interested-in-developing-qt-for-julia/123973 "2024-12-19T01:21:12Z")

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In particular, I’m talking about classic QT Widgets, not QML. I’ve tried taking a stab at it using the QT6 jlls and using the source code for QML.jl as an inspiration, but I quickly realized I have no idea what I’m doin…

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## [Jump model SCS Optimizer](https://discourse.julialang.org/t/jump-model-scs-optimizer/123946)

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**Author:** [@zhenweilin](https://discourse.julialang.org/u/zhenweilin)\
**Replies:** 3\
**Last updated:** [December 19, 2024, 12:19am UTC](https://discourse.julialang.org/t/jump-model-scs-optimizer/123946 "2024-12-19T00:19:49Z")

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Hello, julia community. Recently, I aim to solve a large scale optimization problem, which contains 10M exp cone. When I try to model it by using JUMP, it is too slow. @constraint(jump\_model, con\[i=1:m\], \[x\[m\*n + 2\*i - …

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## [Removing allocations from ForwardDiff.jacobian!](https://discourse.julialang.org/t/removing-allocations-from-forwarddiff-jacobian/80996)

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**Author:** [@jbu](https://discourse.julialang.org/u/jbu)\
**Replies:** 1\
**Last updated:** [December 18, 2024, 10:10pm UTC](https://discourse.julialang.org/t/removing-allocations-from-forwarddiff-jacobian/80996 "2024-12-18T22:10:18Z")

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I’m getting a few stray allocations while using ForwardDiff.jacobian!. I followed the advice in this post, but that didn’t seem to remove them. What’s the best way to track down and eliminate these allocations? Edit: I’…

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## [Non-blocking network IO](https://discourse.julialang.org/t/non-blocking-network-io/123344)

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**Author:** [@phma](https://discourse.julialang.org/u/phma)\
**Replies:** 25\
**Last updated:** [December 18, 2024, 9:41pm UTC](https://discourse.julialang.org/t/non-blocking-network-io/123344 "2024-12-18T21:41:50Z")

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I’m going to write a node that maintains network connections with other nodes. When the node is told to shut down, it has to finish sending and receiving messages, then shut down. This has to take a few seconds at most. …

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## [How to \`combine\` row vectors](https://discourse.julialang.org/t/how-to-combine-row-vectors/123940)

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**Author:** [@alex-s-gardner](https://discourse.julialang.org/u/alex-s-gardner)\
**Replies:** 5\
**Last updated:** [December 18, 2024, 9:24pm UTC](https://discourse.julialang.org/t/how-to-combine-row-vectors/123940 "2024-12-18T21:24:58Z")

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Hi All, Just wondering how I can apply a function to rows containing vectors when doing a groupby → combine: using DataFrames df = DataFrame(group = \["A", "A", "B", "B"\], v1 = \[ \[1, 2\], \[3, 4\], \[5, 6\], \[7, 8\] \], v2 = \[…

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## [Too many nonzeroes for NLP in JuMP and Examodels](https://discourse.julialang.org/t/too-many-nonzeroes-for-nlp-in-jump-and-examodels/123901)

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**Author:** [@KSepetanc](https://discourse.julialang.org/u/KSepetanc)\
**Replies:** 8\
**Last updated:** [December 18, 2024, 7:53pm UTC](https://discourse.julialang.org/t/too-many-nonzeroes-for-nlp-in-jump-and-examodels/123901 "2024-12-18T19:53:07Z")

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Creating a topic as suggested by @odow and mentioned in topic. The issue is that JuMP creates Jacobian and Hessian matrices with nonzeroes for derivatives that are fixed zero. Consider the following two example constra…

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## [Help reviewing PowerModels pull request wanted (PSSE)](https://discourse.julialang.org/t/help-reviewing-powermodels-pull-request-wanted-psse/123958)

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**Author:** [@KSepetanc](https://discourse.julialang.org/u/KSepetanc)\
**Replies:** 2\
**Last updated:** [December 18, 2024, 7:24pm UTC](https://discourse.julialang.org/t/help-reviewing-powermodels-pull-request-wanted-psse/123958 "2024-12-18T19:24:57Z")

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PowerModels currently remarks all load buses to generation buses if there is active generator located at the bus. That is different from the behavior that the PSSE does for the same raw file. As observed by my self, the …

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## [Interaction Between Caching and Benchmarking](https://discourse.julialang.org/t/interaction-between-caching-and-benchmarking/123935)

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**Author:** [@TimHargreaves](https://discourse.julialang.org/u/TimHargreaves)\
**Replies:** 2\
**Last updated:** [December 18, 2024, 5:06pm UTC](https://discourse.julialang.org/t/interaction-between-caching-and-benchmarking/123935 "2024-12-18T17:06:38Z")

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I have a high-level question motivated by a specific example of something strange I’m observing. The high-level question is whether L2/L3 memory caching can have an impact on benchmarking using BenchmarkTools.jl. Specif…

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## [Alert! error when slicing](https://discourse.julialang.org/t/alert-error-when-slicing/123860)

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**Author:** [@govindanupam](https://discourse.julialang.org/u/govindanupam)\
**Replies:** 8\
**Last updated:** [December 18, 2024, 3:21pm UTC](https://discourse.julialang.org/t/alert-error-when-slicing/123860 "2024-12-18T15:21:24Z")

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My intension was to do Slicing an 3d object which is inside the stl file. Please help with below code using FileIO using GeometryBasics using GLMakie rotate\_x(point::GeometryBasics.Point{3, Float32}, angle\_deg::Float…

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## [Build julia without LinearAlgebra](https://discourse.julialang.org/t/build-julia-without-linearalgebra/123962)

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**Author:** [@gitboy16](https://discourse.julialang.org/u/gitboy16)\
**Replies:** 0\
**Last updated:** [December 18, 2024, 3:00pm UTC](https://discourse.julialang.org/t/build-julia-without-linearalgebra/123962 "2024-12-18T15:00:35Z")

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Hi, I understand that LinearAlgebra has been moved to its own repository. Is there a way to build Julia without this library please? Thank you

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## [Looking for a clean way to add a row in a DataFrame](https://discourse.julialang.org/t/looking-for-a-clean-way-to-add-a-row-in-a-dataframe/123891)

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**Author:** [@dobby](https://discourse.julialang.org/u/dobby)\
**Replies:** 10\
**Last updated:** [December 18, 2024, 2:44pm UTC](https://discourse.julialang.org/t/looking-for-a-clean-way-to-add-a-row-in-a-dataframe/123891 "2024-12-18T14:44:24Z")

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Hello, I am new to Julia, so please have mercy. I am reading multiple CSV files, where the rows are the same. But in order to distinguish the different files I’m reading, I have to add a row to indicate that. Here is …

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## [Postdoc in ice flow and subglacial drainage modelling](https://discourse.julialang.org/t/postdoc-in-ice-flow-and-subglacial-drainage-modelling/123960)

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**Author:** [@mauro3](https://discourse.julialang.org/u/mauro3)\
**Replies:** 0\
**Last updated:** [December 18, 2024, 2:09pm UTC](https://discourse.julialang.org/t/postdoc-in-ice-flow-and-subglacial-drainage-modelling/123960 "2024-12-18T14:09:46Z")

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We (@utkinis and I, collaborating with @luraess) are looking for a postdoc (up to 4 years) to join our glaciology group at ETH and WSL in Zurich, Switzerland. You will be part of a numerical and theoretical project whic…

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## [Domains with callable parameters](https://discourse.julialang.org/t/domains-with-callable-parameters/123816)

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**Author:** [@jmaedler](https://discourse.julialang.org/u/jmaedler)\
**Replies:** 2\
**Last updated:** [December 18, 2024, 1:53pm UTC](https://discourse.julialang.org/t/domains-with-callable-parameters/123816 "2024-12-18T13:53:30Z")

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Hi folks, I am currently trying to define Domains with property data functions for the purpose of process simulation in ModelingToolkit.jl. To get started, I took the hydraulic example from the Domains doc page and modi…

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## [How to take Continuous Haar Wavelet Transform of a function?](https://discourse.julialang.org/t/how-to-take-continuous-haar-wavelet-transform-of-a-function/123770)

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**Author:** [@optim](https://discourse.julialang.org/u/optim)\
**Replies:** 2\
**Last updated:** [December 18, 2024, 1:50pm UTC](https://discourse.julialang.org/t/how-to-take-continuous-haar-wavelet-transform-of-a-function/123770 "2024-12-18T13:50:47Z")

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I’ve explored multiple Julia packages like DSP.jl, Wavelets.jl, and ContinuousWavelets.jl for computing continuous Haar wavelet transforms. While it appears that ContinuousWavelets.jl supports Haar wavelets, the exact sy…

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## [Any tips for approaching stability/allocation check integration late into a package?](https://discourse.julialang.org/t/any-tips-for-approaching-stability-allocation-check-integration-late-into-a-package/123875)

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**Author:** [@s\_amap](https://discourse.julialang.org/u/s_amap)\
**Replies:** 4\
**Last updated:** [December 18, 2024, 10:44am UTC](https://discourse.julialang.org/t/any-tips-for-approaching-stability-allocation-check-integration-late-into-a-package/123875 "2024-12-18T10:44:57Z")

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Hi. Working on a package that does some rather generic things with types, I’ve been thinking of adding some type stability checking, performance benchmarks for regression detection, unexpected allocation detections, … I…

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## [Finding the greater word](https://discourse.julialang.org/t/finding-the-greater-word/123909)

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**Author:** [@hack3rcon](https://discourse.julialang.org/u/hack3rcon)\
**Replies:** 19\
**Last updated:** [December 18, 2024, 9:53am UTC](https://discourse.julialang.org/t/finding-the-greater-word/123909 "2024-12-18T09:53:03Z")

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Hello, I have a file with the following contents: \>\>\>Goodness ^ Of ^ Grace: Come :;You broken! \> Heavy laden.. .. \<\<\<+Come! You helpless!?.() come You in despair:-(.. I wrote the following code to find the greater wor…

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## [Test package with check-bounds=no](https://discourse.julialang.org/t/test-package-with-check-bounds-no/123938)

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**Author:** [@gitboy16](https://discourse.julialang.org/u/gitboy16)\
**Replies:** 5\
**Last updated:** [December 18, 2024, 9:01am UTC](https://discourse.julialang.org/t/test-package-with-check-bounds-no/123938 "2024-12-18T09:01:49Z")

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Hi, Is there a way to test a package with check-bounds=no? It seems that it isnalways yes by default. I was thinking about something like: pkg\> test --check-bounds=no Thank you

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## [\[ANN\] YAXArrays.jl v0.6.0 - Yet another xarray-like Julia package](https://discourse.julialang.org/t/ann-yaxarrays-jl-v0-6-0-yet-another-xarray-like-julia-package/123932)

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**Author:** [@lazarusA](https://discourse.julialang.org/u/lazarusA)\
**Replies:** 5\
**Last updated:** [December 18, 2024, 12:50am UTC](https://discourse.julialang.org/t/ann-yaxarrays-jl-v0-6-0-yet-another-xarray-like-julia-package/123932 "2024-12-18T00:50:57Z")

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This thread aims to keep the community updated on the latest developments in YAXArrays.jl. Key features and interoperability highlights so far: Seamless support for NetCDF, TIF files, and large Zarr datasets. Supporte…

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## [How does one access ESRI File GeoDatabases (\*.gdb)?](https://discourse.julialang.org/t/how-does-one-access-esri-file-geodatabases-gdb/108998)

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**Author:** [@PoachedEggs](https://discourse.julialang.org/u/PoachedEggs)\
**Replies:** 6\
**Last updated:** [December 18, 2024, 12:33am UTC](https://discourse.julialang.org/t/how-does-one-access-esri-file-geodatabases-gdb/108998 "2024-12-18T00:33:46Z")

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Greetings, everyone. I am picking up Julia as a second programming language, so bear with me. The JuliaGeo group is making great strides to carve a path for geospatial analytics using Julia. I am excited to see what come…

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## [BifurcationKit: Duffing Equation: Time-Harmonic: Single Harmonic](https://discourse.julialang.org/t/bifurcationkit-duffing-equation-time-harmonic-single-harmonic/123937)

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**Author:** [@Domenico\_Lahaye](https://discourse.julialang.org/u/Domenico_Lahaye)\
**Replies:** 1\
**Last updated:** [December 17, 2024, 10:53pm UTC](https://discourse.julialang.org/t/bifurcationkit-duffing-equation-time-harmonic-single-harmonic/123937 "2024-12-17T22:53:05Z")

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Amazing how easy this was! Apologies for the rusty documentation (in progress). """ input: x: x\[1\] and x\[2\] amplitude of cos and sin mode of single harmonic anzats input: p: angular frequency of the driving excitation…

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## [How to implement a sparse decoder layer in Flux.jl?](https://discourse.julialang.org/t/how-to-implement-a-sparse-decoder-layer-in-flux-jl/123931)

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**Author:** [@Flavio\_Barros](https://discourse.julialang.org/u/Flavio_Barros)\
**Replies:** 1\
**Last updated:** [December 17, 2024, 9:16pm UTC](https://discourse.julialang.org/t/how-to-implement-a-sparse-decoder-layer-in-flux-jl/123931 "2024-12-17T21:16:42Z")

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I’m new to Julia and Flux.jl and I’m trying to implement a Variational Autoencoder (VAE). My decoder has a single layer mapping to the output, but I need to apply different weights to each example. Instead of a dense l…

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## [BifurcationKit.jl: Example-1: Method Error](https://discourse.julialang.org/t/bifurcationkit-jl-example-1-method-error/123936)

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**Author:** [@Domenico\_Lahaye](https://discourse.julialang.org/u/Domenico_Lahaye)\
**Replies:** 3\
**Last updated:** [December 17, 2024, 9:06pm UTC](https://discourse.julialang.org/t/bifurcationkit-jl-example-1-method-error/123936 "2024-12-17T21:06:59Z")

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Very naively (and after a long day) installing BifurcationKit.jl and trying Example-1 F(x, p) = @. p\[1\] + x - x^3/3 prob = BifurcationProblem(F, \[-2.\], \[-1.\], 1; record\_from\_solution = (x,p; k...) -\> x\[1\]) I get Metho…

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## [How to use WarpedView to interpolate a 3D image](https://discourse.julialang.org/t/how-to-use-warpedview-to-interpolate-a-3d-image/123903)

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**Author:** [@buffon](https://discourse.julialang.org/u/buffon)\
**Replies:** 5\
**Last updated:** [December 17, 2024, 6:38pm UTC](https://discourse.julialang.org/t/how-to-use-warpedview-to-interpolate-a-3d-image/123903 "2024-12-17T18:38:39Z")

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I’m referring to the WarpedView function from ImageTransformations.jl: ImageTransformations.jl · ImageTransformations. I can use imresize to interpolate a 3D image naively like: imresize(image, ratio=(1,1,z\_res/xy\_res)),…

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## [\[ANN\] A Package for Generating Corner Plots (PairPlots.jl)](https://discourse.julialang.org/t/ann-a-package-for-generating-corner-plots-pairplots-jl/58542)

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**Author:** [@sefffal](https://discourse.julialang.org/u/sefffal)\
**Replies:** 57\
**Last updated:** [December 17, 2024, 6:28pm UTC](https://discourse.julialang.org/t/ann-a-package-for-generating-corner-plots-pairplots-jl/58542 "2024-12-17T18:28:12Z")

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A Package for Generating Corner Plots (PairPlots.jl) Corner plots are a useful way of visualizing high dimensional data by presenting a grid of 2D histograms comparing each pair of variables. This package aims to provi…

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## [PlotlyJS error when plotting in Emacs running in WSL](https://discourse.julialang.org/t/plotlyjs-error-when-plotting-in-emacs-running-in-wsl/123685)

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**Author:** [@PetrKryslUCSD](https://discourse.julialang.org/u/PetrKryslUCSD)\
**Replies:** 0\
**Last updated:** [December 11, 2024, 4:00am UTC](https://discourse.julialang.org/t/plotlyjs-error-when-plotting-in-emacs-running-in-wsl/123685 "2024-12-11T04:00:01Z")

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Is this a known issue? ERROR: IOError: connect: connection refused (ECONNREFUSED) Stacktrace: \[1\] wait\_connected @ /snap/julia/113/share/julia/stdlib/v1.11/Sockets/src/Sockets.jl:528 \[2\] connect @ /snap/juli…

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## [\[ANN\] DynamicDiff.jl – Fast Symbolic Differentiation for Runtime-Generated Expressions](https://discourse.julialang.org/t/ann-dynamicdiff-jl-fast-symbolic-differentiation-for-runtime-generated-expressions/123907)

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**Author:** [@MilesCranmer](https://discourse.julialang.org/u/MilesCranmer)\
**Replies:** 0\
**Last updated:** [December 17, 2024, 4:58am UTC](https://discourse.julialang.org/t/ann-dynamicdiff-jl-fast-symbolic-differentiation-for-runtime-generated-expressions/123907 "2024-12-17T04:58:02Z")

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DynamicDiff.jl I’m happy to announce DynamicDiff.jl, a package that provides extremely fast, higher-order, compilation-free symbolic differentiation of runtime-generated expressions. Built on top of DynamicEx…

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## [Timer or play button in Bonito app](https://discourse.julialang.org/t/timer-or-play-button-in-bonito-app/123926)

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**Author:** [@snowgum](https://discourse.julialang.org/u/snowgum)\
**Replies:** 3\
**Last updated:** [December 17, 2024, 5:24pm UTC](https://discourse.julialang.org/t/timer-or-play-button-in-bonito-app/123926 "2024-12-17T17:24:45Z")

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I’m using Bonito with WGLMakie to visualise 2D slices of multi-dimensional data in heatmaps. I got a simple slider working together with heatmap (the slider value slices one variable dimension) for a 3D array data: app …

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## [Bug when extending broadcast to ^ and non-explicit Int64](https://discourse.julialang.org/t/bug-when-extending-broadcast-to-and-non-explicit-int64/123826)

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**Author:** [@croberts](https://discourse.julialang.org/u/croberts)\
**Replies:** 2\
**Last updated:** [December 17, 2024, 5:09pm UTC](https://discourse.julialang.org/t/bug-when-extending-broadcast-to-and-non-explicit-int64/123826 "2024-12-17T17:09:36Z")

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Where should bugs be reported? When extended to new type, broadcasting syntax fails in the final case below: import Base.Broadcast.broadcasted struct Bob end broadcasted(f, ::Bob, t) = "here" Bob() .\* 2 Bob(…

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## [Get long type information for struct definition](https://discourse.julialang.org/t/get-long-type-information-for-struct-definition/123900)

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**Author:** [@linwaytin](https://discourse.julialang.org/u/linwaytin)\
**Replies:** 9\
**Last updated:** [December 17, 2024, 4:52pm UTC](https://discourse.julialang.org/t/get-long-type-information-for-struct-definition/123900 "2024-12-17T16:52:43Z")

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Sometimes I want to wrap a struct which has long type information in another struct. For example, I want to wrap an interpolator like this one: julia\> using Interpolations julia\> cubic\_spline\_interpolation(0:0.1:0.2, z…

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## [GPU kernel does not scale properly with data](https://discourse.julialang.org/t/gpu-kernel-does-not-scale-properly-with-data/123863)

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**Author:** [@Giorgos\_Vretinaris](https://discourse.julialang.org/u/Giorgos_Vretinaris)\
**Replies:** 10\
**Last updated:** [December 17, 2024, 8:40am UTC](https://discourse.julialang.org/t/gpu-kernel-does-not-scale-properly-with-data/123863 "2024-12-17T08:40:56Z")

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Hello, I am trying to write a ODE solver on the GPU. I am solving the same simple ODE but for different initial data. I tried the EnsembleGPUArray option from DiffEqGPU.jl but it was quite slow. The kernel I wrote is re…

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