# Latest

**URL:** https://discourse.julialang.org/latest.md?page=7

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

**Page:** 8

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## [Excel files & Julia?](https://discourse.julialang.org/t/excel-files-julia/91253)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 6\
**Last updated:** [September 1, 2026, 6:14am UTC](https://discourse.julialang.org/t/excel-files-julia/91253 "2026-09-01T06:14:51Z")

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It’s exam time, and I need to script the reading of content from a number of Excel files, put the information into a DataFrame, compute grades, and write the result to an Excel file. Last time I did this, I used package…

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## [JuliaHub search not up to date](https://discourse.julialang.org/t/juliahub-search-not-up-to-date/139124)

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**Author:** [@Palli](https://discourse.julialang.org/u/Palli)\
**Replies:** 2\
**Last updated:** [September 1, 2026, 2:15am UTC](https://discourse.julialang.org/t/juliahub-search-not-up-to-date/139124 "2026-09-01T02:15:05Z")

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Enzyme.jl depends on GPUCompiler.jl directly (since 6 years ago): but the reverse is not true, GPUCompiler not listed as a dependent, or I mean maybe some script needs just be run to update info. But I’m not sure where…

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## [Looking for advice on package for lazily evaluated kernel matrix on the GPU](https://discourse.julialang.org/t/looking-for-advice-on-package-for-lazily-evaluated-kernel-matrix-on-the-gpu/139089)

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**Author:** [@trevorgloe](https://discourse.julialang.org/u/trevorgloe)\
**Replies:** 2\
**Last updated:** [September 1, 2026, 12:37am UTC](https://discourse.julialang.org/t/looking-for-advice-on-package-for-lazily-evaluated-kernel-matrix-on-the-gpu/139089 "2026-09-01T00:37:29Z")

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I am working on creating a package for lazily evaluated kernel matrices, which will work on the GPU via KernelAbstractions. The idea is to create a central object (LazyKernelMatrix) which does not allocate and evaluates …

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## [Why does everything keep precompiling?](https://discourse.julialang.org/t/why-does-everything-keep-precompiling/139109)

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**Author:** [@BananaMaster3](https://discourse.julialang.org/u/BananaMaster3)\
**Replies:** 14\
**Last updated:** [August 31, 2026, 9:09pm UTC](https://discourse.julialang.org/t/why-does-everything-keep-precompiling/139109 "2026-08-31T21:09:13Z")

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Hey everybody! I’ve been using julia more and more recently, and it’s been great. The one thing that I’m finding difficult is the thing stopping me from using the language itself – that being precompilation. Whenever I…

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## [Backporting libcurl updates?](https://discourse.julialang.org/t/backporting-libcurl-updates/139121)

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**Author:** [@danielmatz](https://discourse.julialang.org/u/danielmatz)\
**Replies:** 1\
**Last updated:** [August 31, 2026, 7:01pm UTC](https://discourse.julialang.org/t/backporting-libcurl-updates/139121 "2026-08-31T19:01:03Z")

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Our sys admins have flagged the libcurl that ships with Julia for security issues. They are asking us to update to at 8.21.0. I see that it got merged into master a little while ago: curl: New version 8.21.0 - Pull Reque…

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## [\[ANN\] SpaceStation.jl: A workspace for Pluto notebooks (+ AI stuff)](https://discourse.julialang.org/t/ann-spacestation-jl-a-workspace-for-pluto-notebooks-ai-stuff/138017)

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**Author:** [@Dale\_James\_Black](https://discourse.julialang.org/u/Dale_James_Black)\
**Replies:** 17\
**Last updated:** [August 31, 2026, 2:55pm UTC](https://discourse.julialang.org/t/ann-spacestation-jl-a-workspace-for-pluto-notebooks-ai-stuff/138017 "2026-08-31T14:55:47Z")

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I am announcing this package for anyone to try out, but just copy-pasting the readme. It should be considered beta, but it works well so give it a go! I don’t touch windows much though so there might be more bugs on that…

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## [Frustrations with a JOSS rejection](https://discourse.julialang.org/t/frustrations-with-a-joss-rejection/139086)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 5\
**Last updated:** [August 31, 2026, 1:43pm UTC](https://discourse.julialang.org/t/frustrations-with-a-joss-rejection/139086 "2026-08-31T13:43:20Z")

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I have also submitted my Julia code work for Athena++ simulation data plotting in JOSS. But reviewer rejected it saying that script is too small. It took me 6 months to develop this algorithm but still they rejected. I g…

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## [Reading large CSV files](https://discourse.julialang.org/t/reading-large-csv-files/139061)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 9\
**Last updated:** [August 31, 2026, 11:56am UTC](https://discourse.julialang.org/t/reading-large-csv-files/139061 "2026-08-31T11:56:40Z")

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Hi, is there any way to read a 88 GB csv file into a DataFrame? It kills julia, even with the -t auto option. Thanks!

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## [Having trouble with the parse function](https://discourse.julialang.org/t/having-trouble-with-the-parse-function/139108)

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**Author:** [@Guel](https://discourse.julialang.org/u/Guel)\
**Replies:** 2\
**Last updated:** [August 31, 2026, 4:29am UTC](https://discourse.julialang.org/t/having-trouble-with-the-parse-function/139108 "2026-08-31T04:29:26Z")

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Hey all, I´m trying to make a very simple code where the user types a radius and julia returns the calculated area and circumference of a circle with that radius. println(“circle.jl”); println(“Escolha um raio”); raio …

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## [\[ANN\] MissingPatterns.jl — visualize missing data in the terminal](https://discourse.julialang.org/t/ann-missingpatterns-jl-visualize-missing-data-in-the-terminal/139114)

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**Author:** [@dantebertuzzi](https://discourse.julialang.org/u/dantebertuzzi)\
**Replies:** 1\
**Last updated:** [August 31, 2026, 3:06am UTC](https://discourse.julialang.org/t/ann-missingpatterns-jl-visualize-missing-data-in-the-terminal/139114 "2026-08-31T03:06:47Z")

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Hi everyone, I’d like to announce MissingPatterns.jl, a small toolkit for exploring missing data patterns directly in the terminal. The package started from a gap I kept running into: in Python I’d reach for missingno …

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## [\[ANN\] gRPCServer.jl - A Native gRPC Server Implementation for Julia](https://discourse.julialang.org/t/ann-grpcserver-jl-a-native-grpc-server-implementation-for-julia/135053)

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**Author:** [@scelles](https://discourse.julialang.org/u/scelles)\
**Replies:** 14\
**Last updated:** [August 30, 2026, 7:01pm UTC](https://discourse.julialang.org/t/ann-grpcserver-jl-a-native-grpc-server-implementation-for-julia/135053 "2026-08-30T19:01:44Z")

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Hi everyone! :waving\_hand: I’m excited to share a new native Julia gRPC server library I’m working on: gRPCServer.jl. :link: Repository: https://github.com/s-celles/gRPCServer.jl (Currently unregistered — and still in…

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## [Where do these NaNs in my KernelAbstraction derivative come from?](https://discourse.julialang.org/t/where-do-these-nans-in-my-kernelabstraction-derivative-come-from/139105)

<div class="topic-metadata">

**Author:** [@rkube](https://discourse.julialang.org/u/rkube)\
**Replies:** 0\
**Last updated:** [August 30, 2026, 5:35pm UTC](https://discourse.julialang.org/t/where-do-these-nans-in-my-kernelabstraction-derivative-come-from/139105 "2026-08-30T17:35:37Z")

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Hi, I (mostly chatgpt though) am working on an MHD code using KernelAbstractions.jl, Reactant.jl and Enzyme.jl. In one step, a kernel derivative produces NaNs whereas the reactant gradient using plain arrays gives corre…

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## [With DynamicPolynomials and non-commutative variables, (x+y)\*z does not work](https://discourse.julialang.org/t/with-dynamicpolynomials-and-non-commutative-variables-x-y-z-does-not-work/139046)

<div class="topic-metadata">

**Author:** [@The\_Suffocated](https://discourse.julialang.org/u/The_Suffocated)\
**Replies:** 4\
**Last updated:** [August 30, 2026, 3:51pm UTC](https://discourse.julialang.org/t/with-dynamicpolynomials-and-non-commutative-variables-x-y-z-does-not-work/139046 "2026-08-30T15:51:52Z")

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How to right-multiply x+y by z in DynamicPolynomials when x, y, z are non-commutative? I have tried (x+y)\*z, but Julia returns an ERROR: MethodError: no method matching map\_exponents(::typeof(+), ::MonomialVector{…}, ::V…

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## [Scaling arrow heads in quiver function](https://discourse.julialang.org/t/scaling-arrow-heads-in-quiver-function/139101)

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**Author:** [@Tjipke](https://discourse.julialang.org/u/Tjipke)\
**Replies:** 2\
**Last updated:** [August 30, 2026, 3:46pm UTC](https://discourse.julialang.org/t/scaling-arrow-heads-in-quiver-function/139101 "2026-08-30T15:46:53Z")

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I am having trouble with creating nice flow plots for a velocity vector field. I try to use the quiver command but cannot find how to scale the arrow heads properly. Below a picture of the plot, I want to have the heads …

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## [Merging and formatting cells in Excel from Julia](https://discourse.julialang.org/t/merging-and-formatting-cells-in-excel-from-julia/18786)

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**Author:** [@ahmetumutdurmus](https://discourse.julialang.org/u/ahmetumutdurmus)\
**Replies:** 3\
**Last updated:** [August 30, 2026, 2:55pm UTC](https://discourse.julialang.org/t/merging-and-formatting-cells-in-excel-from-julia/18786 "2026-08-30T14:55:30Z")

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Hello, Is there a way of merging cells, formatting and aligning cell contents in an Excel file using Julia? Using a package is also fine. I am currently using XLSX.jl to write to Excel files yet for merging, formatting …

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## [Write to XLSX file while maintaining formatting](https://discourse.julialang.org/t/write-to-xlsx-file-while-maintaining-formatting/87715)

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**Author:** [@Carl\_Talsma](https://discourse.julialang.org/u/Carl_Talsma)\
**Replies:** 2\
**Last updated:** [August 30, 2026, 2:54pm UTC](https://discourse.julialang.org/t/write-to-xlsx-file-while-maintaining-formatting/87715 "2026-08-30T14:54:34Z")

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Hi, I’m trying to write data to a .xlsx file that has already been formatted (cell size, colors, etc.). Is there anyway to write data to a .xlsx file while maintaining the existing formatting? I’m currently using the XL…

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## [Diagrams for types and interfaces](https://discourse.julialang.org/t/diagrams-for-types-and-interfaces/139102)

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**Author:** [@slwu89](https://discourse.julialang.org/u/slwu89)\
**Replies:** 0\
**Last updated:** [August 30, 2026, 2:49pm UTC](https://discourse.julialang.org/t/diagrams-for-types-and-interfaces/139102 "2026-08-30T14:49:00Z")

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Hi all, I’m curious if anyone has any experience (and ideally, examples) of using a formal diagramming language in Julia to describe types and interfaces. Many complex ecosystems (SciML, Turing.jl, JuMP.jl) define a lot …

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## [XLSX cell format](https://discourse.julialang.org/t/xlsx-cell-format/113975)

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**Author:** [@monty](https://discourse.julialang.org/u/monty)\
**Replies:** 8\
**Last updated:** [August 30, 2026, 8:11am UTC](https://discourse.julialang.org/t/xlsx-cell-format/113975 "2026-08-30T08:11:49Z")

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I tried different approaches to specify a numerical format with 4 decimal places of all the cells in an Excel sheet generated using XLSX.jl. None of them worked. Any suggestions?

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## [Reading in Excel Data from GitHub](https://discourse.julialang.org/t/reading-in-excel-data-from-github/58055)

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**Author:** [@Michael\_Barmann](https://discourse.julialang.org/u/Michael_Barmann)\
**Replies:** 9\
**Last updated:** [August 30, 2026, 8:01am UTC](https://discourse.julialang.org/t/reading-in-excel-data-from-github/58055 "2026-08-30T08:01:14Z")

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I am preparing a Minimal Reproducible Example which involves reading in some data contained in an Excel file. I’m trying to figure out the best way to make the data easily accessible for anyone who wants to run my code. …

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## [XLSX.jl merging and formatting cells in Excel file?](https://discourse.julialang.org/t/xlsx-jl-merging-and-formatting-cells-in-excel-file/71719)

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**Author:** [@programista](https://discourse.julialang.org/u/programista)\
**Replies:** 6\
**Last updated:** [August 30, 2026, 1:44am UTC](https://discourse.julialang.org/t/xlsx-jl-merging-and-formatting-cells-in-excel-file/71719 "2026-08-30T01:44:10Z")

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XLSX.jl How merging and formatting cells in Excel file? 1 How to combine/merge cells in a worksheet e.g. A1: C3 2. How to format table boundaries Paul

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## [How can I read an excel named table in Julia?](https://discourse.julialang.org/t/how-can-i-read-an-excel-named-table-in-julia/103984)

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**Author:** [@Emmanouil\_Bakirtzis](https://discourse.julialang.org/u/Emmanouil_Bakirtzis)\
**Replies:** 6\
**Last updated:** [August 30, 2026, 12:46am UTC](https://discourse.julialang.org/t/how-can-i-read-an-excel-named-table-in-julia/103984 "2026-08-30T00:46:17Z")

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Is there a way to read an excel named table in Julia? By “excel named table” I mean the object that is created in office excel you go insert → table (it is different that a named cell range) I have tried all julia exce…

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## [Writing to large excel file (.xlsm) using XLSX](https://discourse.julialang.org/t/writing-to-large-excel-file-xlsm-using-xlsx/60094)

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**Author:** [@yogi1](https://discourse.julialang.org/u/yogi1)\
**Replies:** 2\
**Last updated:** [August 29, 2026, 8:56pm UTC](https://discourse.julialang.org/t/writing-to-large-excel-file-xlsm-using-xlsx/60094 "2026-08-29T20:56:04Z")

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Hi all, I’m trying to pass a dataframe to a large xlsm file (80mbs). The code I’m using is as follows: using XLSX, DataFrames XLSX.openxlsx("xlsm\_file.xlsm", mode ="rw" ) do xf # pass through the dataframe, df …

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## [Excel doesn't recalculate after using XLSX package](https://discourse.julialang.org/t/excel-doesnt-recalculate-after-using-xlsx-package/70881)

<div class="topic-metadata">

**Author:** [@Pahec97](https://discourse.julialang.org/u/Pahec97)\
**Replies:** 8\
**Last updated:** [August 29, 2026, 6:25pm UTC](https://discourse.julialang.org/t/excel-doesnt-recalculate-after-using-xlsx-package/70881 "2026-08-29T18:25:05Z")

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Hello, my problem is as follows: Having a excel file, which does something with the data, for example in figure 1. With XLSX, I rewrite the numbers n1 and n2, code in figure 2. The result of the excel formula doesn’t …

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## [How do you get formulas created by XLSX.jl to be read automatically in Excel?](https://discourse.julialang.org/t/how-do-you-get-formulas-created-by-xlsx-jl-to-be-read-automatically-in-excel/75701)

<div class="topic-metadata">

**Author:** [@scotts](https://discourse.julialang.org/u/scotts)\
**Replies:** 3\
**Last updated:** [August 29, 2026, 5:46pm UTC](https://discourse.julialang.org/t/how-do-you-get-formulas-created-by-xlsx-jl-to-be-read-automatically-in-excel/75701 "2026-08-29T17:46:34Z")

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I’m making Excel files with XLSX.jl. Everything works as it should, however, I’ve found when I create formulas for the spreadsheet they just show up as text in Excel. I can manually get them to register and process if …

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## [Generate excel spreadsheet from julia equations?](https://discourse.julialang.org/t/generate-excel-spreadsheet-from-julia-equations/92444)

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**Author:** [@OliverEvans96](https://discourse.julialang.org/u/OliverEvans96)\
**Replies:** 1\
**Last updated:** [August 29, 2026, 5:43pm UTC](https://discourse.julialang.org/t/generate-excel-spreadsheet-from-julia-equations/92444 "2026-08-29T17:43:11Z")

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Hi all, Imagine a spreadsheet with columns A, B, C. Suppose A are observations, and B = B(A), C = C(A, B) are defined by excel formulas involving the previous columns. This is a pretty common scenario in excel. I was j…

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## [Sending excel file as response is slow](https://discourse.julialang.org/t/sending-excel-file-as-response-is-slow/116705)

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**Author:** [@Sandy45](https://discourse.julialang.org/u/Sandy45)\
**Replies:** 8\
**Last updated:** [August 29, 2026, 4:46pm UTC](https://discourse.julialang.org/t/sending-excel-file-as-response-is-slow/116705 "2026-08-29T16:46:40Z")

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I have an API which get csv file in the request and all I need to do is format and send the response as excel file. I am reading the data into dataframe and directly writing into excel. The issue is that writing data in…

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## [Why does base not include Float128?](https://discourse.julialang.org/t/why-does-base-not-include-float128/139092)

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**Author:** [@rokke](https://discourse.julialang.org/u/rokke)\
**Replies:** 3\
**Last updated:** [August 29, 2026, 12:38am UTC](https://discourse.julialang.org/t/why-does-base-not-include-float128/139092 "2026-08-29T00:38:55Z")

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I always thought it was weird that Base supports Float16 but doesn’t include Float128, even though IEE754 considers quads a basic format, while half is just an interchange format: the other benefit of including 128 in…

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## [What are the real costs of AI](https://discourse.julialang.org/t/what-are-the-real-costs-of-ai/139090)

<div class="topic-metadata">

**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 4\
**Last updated:** [August 28, 2026, 10:19pm UTC](https://discourse.julialang.org/t/what-are-the-real-costs-of-ai/139090 "2026-08-28T22:19:53Z")

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I am using Claude Professional, and have a usage counter (Claude Code Usage VSCode plugin) installed. It tells me that I spend tokens worth $80 per day, but I pay only $20 per month. Where is this this huge difference c…

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## [Runic.jl: A code formatter with rules set in stone](https://discourse.julialang.org/t/runic-jl-a-code-formatter-with-rules-set-in-stone/117898)

<div class="topic-metadata">

**Author:** [@fredrikekre](https://discourse.julialang.org/u/fredrikekre)\
**Replies:** 50\
**Last updated:** [August 28, 2026, 5:05pm UTC](https://discourse.julialang.org/t/runic-jl-a-code-formatter-with-rules-set-in-stone/117898 "2026-08-28T17:05:28Z")

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I have been tinkering with a code formatter that I want to announce: Runic.jl. Sample output from running Runic with check and diff mode enabled on a small code base. Just like e.g. gofmt (Go formatter) and black (P…

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## [I need at least one more reviewer for a Julia submission in JOSS](https://discourse.julialang.org/t/i-need-at-least-one-more-reviewer-for-a-julia-submission-in-joss/139071)

<div class="topic-metadata">

**Author:** [@jbytecode](https://discourse.julialang.org/u/jbytecode)\
**Replies:** 1\
**Last updated:** [August 28, 2026, 2:41pm UTC](https://discourse.julialang.org/t/i-need-at-least-one-more-reviewer-for-a-julia-submission-in-joss/139071 "2026-08-28T14:41:40Z")

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Hi, I need to find at least one more suitable reviewer for the JOSS submission entitled: ABCdeZ.jl: Simulation-based Bayesian inference and model evidence estimation in Julia Here is the submission URL: Please ping…

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