# Latest

**URL:** https://discourse.julialang.org/latest.md?page=1520

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

**Page:** 1521

---

## [Invalid version string during Windows build](https://discourse.julialang.org/t/invalid-version-string-during-windows-build/53474)

<div class="topic-metadata">

**Author:** [@mkitti](https://discourse.julialang.org/u/mkitti)\
**Replies:** 1\
**Last updated:** [January 17, 2021, 7:50am UTC](https://discourse.julialang.org/t/invalid-version-string-during-windows-build/53474 "2021-01-17T07:50:04Z")

</div>

I encountered the following error when trying to build Julia on Windows via Cygwin. $ make -j8 ... JULIA usr/lib/julia/sys.ji ... error during bootstrap: LoadError("sysimg.jl", 3, LoadError("Base.jl", 226, LoadError…

---

## [CSV.read() error please provide a valid sink argument](https://discourse.julialang.org/t/csv-read-error-please-provide-a-valid-sink-argument/53437)

<div class="topic-metadata">

**Author:** [@tonyhur](https://discourse.julialang.org/u/tonyhur)\
**Replies:** 3\
**Last updated:** [January 17, 2021, 8:03am UTC](https://discourse.julialang.org/t/csv-read-error-please-provide-a-valid-sink-argument/53437 "2021-01-17T08:03:57Z")

</div>

Hello I anm new here. I work through the real great book “Julia Quick syntax reference” from Antonello Lobianco. I typed a code from page 183. What is wrong with d\_table = CSV.read(IOBuffer(“”" plants new-york chic…

---

## [HighFrequencyCovariance.jl - Algorithms for efficiently estimating covariance matrices with high frequency financial data](https://discourse.julialang.org/t/highfrequencycovariance-jl-algorithms-for-efficiently-estimating-covariance-matrices-with-high-frequency-financial-data/53464)

<div class="topic-metadata">

**Author:** [@s-baumann](https://discourse.julialang.org/u/s-baumann)\
**Replies:** 1\
**Last updated:** [January 17, 2021, 3:06am UTC](https://discourse.julialang.org/t/highfrequencycovariance-jl-algorithms-for-efficiently-estimating-covariance-matrices-with-high-frequency-financial-data/53464 "2021-01-17T03:06:32Z")

</div>

HighFrequencyCovariance.jl is a Julia package designed to utilize high frequency financial data to estimate covariances between the prices of assets. High frequency data can be used to more accurately estimate covariance…

---

## [Question on lazy map function](https://discourse.julialang.org/t/question-on-lazy-map-function/53450)

<div class="topic-metadata">

**Author:** [@asyrov](https://discourse.julialang.org/u/asyrov)\
**Replies:** 10\
**Last updated:** [January 17, 2021, 1:50am UTC](https://discourse.julialang.org/t/question-on-lazy-map-function/53450 "2021-01-17T01:50:50Z")

</div>

Can anyone please point me to overview of using (maybe different kinds) of map/reduce/filter functions in Julia (and it’s standard packages)? Here is is what I’m missing now: I want any(map(x -\> x \> 0, big\_rand\_array)) …

---

## [Non-deterministic segfault (only triggered on GitHub Actions). Tips for debugging?](https://discourse.julialang.org/t/non-deterministic-segfault-only-triggered-on-github-actions-tips-for-debugging/53367)

<div class="topic-metadata">

**Author:** [@vlandau](https://discourse.julialang.org/u/vlandau)\
**Replies:** 10\
**Last updated:** [January 16, 2021, 10:54pm UTC](https://discourse.julialang.org/t/non-deterministic-segfault-only-triggered-on-github-actions-tips-for-debugging/53367 "2021-01-16T22:54:28Z")

</div>

I’m encountering a strange segfault error in my package tests that appears to be non-deterministic, and is only triggered during CI with GitHub Actions. I’m not able to reproduce locally. This issue is occurring on MacO…

---

## [Broadcasting in TensorOperations.jl (and applying ForwardDiff)](https://discourse.julialang.org/t/broadcasting-in-tensoroperations-jl-and-applying-forwarddiff/53421)

<div class="topic-metadata">

**Author:** [@bhaveshshrimali](https://discourse.julialang.org/u/bhaveshshrimali)\
**Replies:** 4\
**Last updated:** [January 16, 2021, 9:38pm UTC](https://discourse.julialang.org/t/broadcasting-in-tensoroperations-jl-and-applying-forwarddiff/53421 "2021-01-16T21:38:22Z")

</div>

Hi everyone, \[Edit\] Question 1: I had a quick question regarding the usage of TensorOperations.jl. How would one go about broadcasting certain operations such as using TensorOperations; function g(F) @tensor F\[i,j\]…

---

## [Makie in vmware player](https://discourse.julialang.org/t/makie-in-vmware-player/53439)

<div class="topic-metadata">

**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 1\
**Last updated:** [January 16, 2021, 8:32pm UTC](https://discourse.julialang.org/t/makie-in-vmware-player/53439 "2021-01-16T20:32:48Z")

</div>

I am trying to make Makie.jl work within a virtual machine. I can install it successfully using the following setup: ubuntu 18.04 host with nvidia 390.141 driver cinamon 20.1 running in vmware player But when I execut…

---

## [Use IJulia after updating Julia version](https://discourse.julialang.org/t/use-ijulia-after-updating-julia-version/53444)

<div class="topic-metadata">

**Author:** [@Christopher\_Fisher](https://discourse.julialang.org/u/Christopher_Fisher)\
**Replies:** 8\
**Last updated:** [January 16, 2021, 8:17pm UTC](https://discourse.julialang.org/t/use-ijulia-after-updating-julia-version/53444 "2021-01-16T20:17:09Z")

</div>

I would like to use IJulia notebook with Julia 1.6.0 beta1. However, it does not show up in the list of available kernels. Is there a way to add it to the list? Thanks!

---

## [Yet another Makie Gallery](https://discourse.julialang.org/t/yet-another-makie-gallery/53196)

<div class="topic-metadata">

**Author:** [@lazarusA](https://discourse.julialang.org/u/lazarusA)\
**Replies:** 11\
**Last updated:** [January 16, 2021, 7:39pm UTC](https://discourse.julialang.org/t/yet-another-makie-gallery/53196 "2021-01-16T19:39:48Z")

</div>

An up to date gallery with easy to copy and paste examples for doing nice plots with Makie. Here, a glowing example!

---

## [Julia on Cluster with SSH Restriction](https://discourse.julialang.org/t/julia-on-cluster-with-ssh-restriction/11823)

<div class="topic-metadata">

**Author:** [@brossetti](https://discourse.julialang.org/u/brossetti)\
**Replies:** 18\
**Last updated:** [January 16, 2021, 7:25pm UTC](https://discourse.julialang.org/t/julia-on-cluster-with-ssh-restriction/11823 "2021-01-16T19:25:05Z")

</div>

I’m attempting to use Julia on a cluster (using PBS) that blocks ssh connections to anything except the head node. Based on the documentation, it seems that Julia requires passwordless ssh to start workers on cluster nod…

---

## [From Python-cgkit to Makie.jl](https://discourse.julialang.org/t/from-python-cgkit-to-makie-jl/52129)

<div class="topic-metadata">

**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 3\
**Last updated:** [January 16, 2021, 6:11pm UTC](https://discourse.julialang.org/t/from-python-cgkit-to-makie-jl/52129 "2021-01-16T18:11:27Z")

</div>

I am trying to convert the 3D viewer of my kitepower system simulator (Bitbucket) to Julia/ Makie.jl. The old Python/C++ library is unsupported since 8 years and the newest system where it works is Ubuntu 14.04, so I …

---

## [Macro problem](https://discourse.julialang.org/t/macro-problem/53431)

<div class="topic-metadata">

**Author:** [@harven](https://discourse.julialang.org/u/harven)\
**Replies:** 9\
**Last updated:** [January 16, 2021, 5:20pm UTC](https://discourse.julialang.org/t/macro-problem/53431 "2021-01-16T17:20:43Z")

</div>

I would like to compute the first n digits of some number x in base b. This looks like a job for a macro since the argument should be evaluated only after the precision has been set. macro numbers(x, b, n = 100) setp…

---

## [PoSTagger on other languages than English](https://discourse.julialang.org/t/postagger-on-other-languages-than-english/53385)

<div class="topic-metadata">

**Author:** [@tencnivel](https://discourse.julialang.org/u/tencnivel)\
**Replies:** 2\
**Last updated:** [January 16, 2021, 5:00pm UTC](https://discourse.julialang.org/t/postagger-on-other-languages-than-english/53385 "2021-01-16T17:00:22Z")

</div>

Has anyone manage to use TextModels PoSTagger on another language than English? The following does not work, everything gets tagged as ‘NNP’: using TextModels using TextAnalysis using Languages str = "André trouve cet…

---

## [Extending function from Base](https://discourse.julialang.org/t/extending-function-from-base/53414)

<div class="topic-metadata">

**Author:** [@mr.red](https://discourse.julialang.org/u/mr.red)\
**Replies:** 5\
**Last updated:** [January 16, 2021, 4:11pm UTC](https://discourse.julialang.org/t/extending-function-from-base/53414 "2021-01-16T16:11:56Z")

</div>

The function Base.binomial(n, k) has 3 different calling patterns: julia\> methods(Base.binomial) # 3 methods for generic function "binomial": \[1\] binomial(n::BigInt, k::UInt64) in Base.GMP at gmp.jl:641 \[2\] binomial(n::…

---

## [Installing package seems to update everything unintentionally?](https://discourse.julialang.org/t/installing-package-seems-to-update-everything-unintentionally/25134)

<div class="topic-metadata">

**Author:** [@marius311](https://discourse.julialang.org/u/marius311)\
**Replies:** 17\
**Last updated:** [January 16, 2021, 3:40pm UTC](https://discourse.julialang.org/t/installing-package-seems-to-update-everything-unintentionally/25134 "2021-01-16T15:40:14Z")

</div>

I was under the impression that installing a new package should not update any existing packages, unless this is required to satisfy dependencies. Nevertheless, I feel like this is what happens whenever I install anythin…

---

## [Plots (PyPlot) - Set legend title font size](https://discourse.julialang.org/t/plots-pyplot-set-legend-title-font-size/31763)

<div class="topic-metadata">

**Author:** [@timmm](https://discourse.julialang.org/u/timmm)\
**Replies:** 2\
**Last updated:** [January 16, 2021, 2:40pm UTC](https://discourse.julialang.org/t/plots-pyplot-set-legend-title-font-size/31763 "2021-01-16T14:40:10Z")

</div>

Hi, When using Plots (PyPlot backend) I cant seem to control the font size of the legends title: using Plots, LaTeXStrings pyplot() upscale = 2 #Xx upscaling in resolution p=plot( ) fntsm = Plots.font("sans-serif", po…

---

## [Documenting extended function from Base](https://discourse.julialang.org/t/documenting-extended-function-from-base/53432)

<div class="topic-metadata">

**Author:** [@mr.red](https://discourse.julialang.org/u/mr.red)\
**Replies:** 0\
**Last updated:** [January 16, 2021, 1:07pm UTC](https://discourse.julialang.org/t/documenting-extended-function-from-base/53432 "2021-01-16T13:07:46Z")

</div>

I am extending the Base.binomial which assumes two integer arguments to two complex arguments in SpecialFunctions. Now, I have problems documenting it. Currently it is implemented via """ binomial(x, y) Generalize…

---

## [Issue with parsing multiple items with "="](https://discourse.julialang.org/t/issue-with-parsing-multiple-items-with/53430)

<div class="topic-metadata">

**Author:** [@herm](https://discourse.julialang.org/u/herm)\
**Replies:** 2\
**Last updated:** [January 16, 2021, 12:47pm UTC](https://discourse.julialang.org/t/issue-with-parsing-multiple-items-with/53430 "2021-01-16T12:47:44Z")

</div>

There seems to be issue with the parsing of complex expressions with multiple items in the equal, the following code works for K=2:NZ1 for J=2:NY1 for I=2:NX1 HXS\[I,J,K\],HYS\[I,J,K\],HZS\[I,J,K\]= HXS\[I,J,K\]-sum(ygradke…

---

## [Scoping is too confusing with custom package and modules to use \`pmap\`](https://discourse.julialang.org/t/scoping-is-too-confusing-with-custom-package-and-modules-to-use-pmap/53383)

<div class="topic-metadata">

**Author:** [@iHany](https://discourse.julialang.org/u/iHany)\
**Replies:** 3\
**Last updated:** [January 16, 2021, 12:37pm UTC](https://discourse.julialang.org/t/scoping-is-too-confusing-with-custom-package-and-modules-to-use-pmap/53383 "2021-01-16T12:37:18Z")

</div>

I saw the previous post about pmap. However, the answers do not work for me. Here’s my example. What am I missing? Note that MyPackage is generated by PkgTemplates. src/MyPackage.jl module MyPackage using Reexport…

---

## [User cuts and Lazy Constraints JuMP Gurobi](https://discourse.julialang.org/t/user-cuts-and-lazy-constraints-jump-gurobi/53328)

<div class="topic-metadata">

**Author:** [@baprata](https://discourse.julialang.org/u/baprata)\
**Replies:** 4\
**Last updated:** [January 16, 2021, 8:43am UTC](https://discourse.julialang.org/t/user-cuts-and-lazy-constraints-jump-gurobi/53328 "2021-01-16T08:43:10Z")

</div>

I am trying to insert user cuts and lazy constraints in a mixed-integer linear programming model. I am putting the functions in separate files from the main model. An illustrative example: function valid\_inequality(cb\_d…

---

## [Using parametric type inside outer parametric constructor](https://discourse.julialang.org/t/using-parametric-type-inside-outer-parametric-constructor/53388)

<div class="topic-metadata">

**Author:** [@schneiderfelipe](https://discourse.julialang.org/u/schneiderfelipe)\
**Replies:** 33\
**Last updated:** [January 16, 2021, 5:10am UTC](https://discourse.julialang.org/t/using-parametric-type-inside-outer-parametric-constructor/53388 "2021-01-16T05:10:34Z")

</div>

Hi, I can’t figure out how to use a parametric type inside a constructor. Namely, the following single commented line can’t be used: struct Foo{T\<:Real, S\<:AbstractMatrix{\<:T}} \<: AbstractArray{T, 4} data::S n::Int …

---

## [Pluto and Plotting Inside a For Loop](https://discourse.julialang.org/t/pluto-and-plotting-inside-a-for-loop/53424)

<div class="topic-metadata">

**Author:** [@TI36XPro](https://discourse.julialang.org/u/TI36XPro)\
**Replies:** 3\
**Last updated:** [January 16, 2021, 4:33am UTC](https://discourse.julialang.org/t/pluto-and-plotting-inside-a-for-loop/53424 "2021-01-16T04:33:05Z")

</div>

Hello, I’ve generated an array of composite types (which I’ve I’ve defined). Each composite type has two fields called t and T which contain equally sized vectors. Each composite type saved in my array represents a diff…

---

## [Update the stable version docs with Documenter.jl](https://discourse.julialang.org/t/update-the-stable-version-docs-with-documenter-jl/51048)

<div class="topic-metadata">

**Author:** [@zachmatson](https://discourse.julialang.org/u/zachmatson)\
**Replies:** 4\
**Last updated:** [January 16, 2021, 4:22am UTC](https://discourse.julialang.org/t/update-the-stable-version-docs-with-documenter-jl/51048 "2021-01-16T04:22:23Z")

</div>

I want to change the documentation for the current version of my package and I have no code changes to release. Should I create a point release just for this? Or is there some way to edit the stable version of the Docume…

---

## [How to load the values returned by callback functions (defined in a Julia wrapper) to C functions](https://discourse.julialang.org/t/how-to-load-the-values-returned-by-callback-functions-defined-in-a-julia-wrapper-to-c-functions/53403)

<div class="topic-metadata">

**Author:** [@ven-k](https://discourse.julialang.org/u/ven-k)\
**Replies:** 5\
**Last updated:** [January 16, 2021, 4:22am UTC](https://discourse.julialang.org/t/how-to-load-the-values-returned-by-callback-functions-defined-in-a-julia-wrapper-to-c-functions/53403 "2021-01-16T04:22:13Z")

</div>

\[4/6 and 5/6 solved it\] I am trying to wrap ngspice\_jll.jl And have generated wrapper functions to sharedspice.h file. A typical function has pointers to callback functions as arguments. Initialization looks like: func…

---

## [Tail-call optimization and function-barrier -based accumulation in loops](https://discourse.julialang.org/t/tail-call-optimization-and-function-barrier-based-accumulation-in-loops/25831)

<div class="topic-metadata">

**Author:** [@tkf](https://discourse.julialang.org/u/tkf)\
**Replies:** 13\
**Last updated:** [January 16, 2021, 3:20am UTC](https://discourse.julialang.org/t/tail-call-optimization-and-function-barrier-based-accumulation-in-loops/25831 "2021-01-16T03:20:29Z")

</div>

Tail-call optimization/elimination was brought up in several threads like this one in discourse and this one in GitHub. The main interest seems to be purely based on the nice-to-have performance benefit and the core devs…

---

## [Error Building Package](https://discourse.julialang.org/t/error-building-package/53369)

<div class="topic-metadata">

**Author:** [@Ian\_Slagle](https://discourse.julialang.org/u/Ian_Slagle)\
**Replies:** 0\
**Last updated:** [January 15, 2021, 12:20am UTC](https://discourse.julialang.org/t/error-building-package/53369 "2021-01-15T00:20:39Z")

</div>

I am trying to install LRSLib.jl (from https://github.com/JuliaPolyhedra/LRSLib.jl) on my Debian machine (I mention because the library is not working with Windows). However, I seem to be running into an issue installin…

---

## [Intersect of 2 arrays](https://discourse.julialang.org/t/intersect-of-2-arrays/53387)

<div class="topic-metadata">

**Author:** [@Laco\_Kovac](https://discourse.julialang.org/u/Laco_Kovac)\
**Replies:** 7\
**Last updated:** [January 15, 2021, 10:00pm UTC](https://discourse.julialang.org/t/intersect-of-2-arrays/53387 "2021-01-15T22:00:31Z")

</div>

I have 2 arrays of Dict containing from and to items, both of type ZonedDateTime (although for our example they could be integers, doesn’t matter). They are basically 2 arrays of ranges. What would be the simplest/the m…

---

## [DelimitedFiles reading everything in one column](https://discourse.julialang.org/t/delimitedfiles-reading-everything-in-one-column/53399)

<div class="topic-metadata">

**Author:** [@jmcastro2109](https://discourse.julialang.org/u/jmcastro2109)\
**Replies:** 1\
**Last updated:** [January 15, 2021, 9:56pm UTC](https://discourse.julialang.org/t/delimitedfiles-reading-everything-in-one-column/53399 "2021-01-15T21:56:23Z")

</div>

Hi! I am trying to read a csv file in Julia using readdlm. When I do this, readdlm wraps each row in my csv in a quote, and thus, ignores the \\t column delimiters. Each row of the Matrix looks like this: Matrix = rea…

---

## [NeutronTransport.jl, a neutron transport solver package](https://discourse.julialang.org/t/neutrontransport-jl-a-neutron-transport-solver-package/53200)

<div class="topic-metadata">

**Author:** [@rvignolo](https://discourse.julialang.org/u/rvignolo)\
**Replies:** 1\
**Last updated:** [January 15, 2021, 9:37pm UTC](https://discourse.julialang.org/t/neutrontransport-jl-a-neutron-transport-solver-package/53200 "2021-01-15T21:37:59Z")

</div>

Hi! I would like to announce the first version of NeutronTransport.jl, a package that solves the neutron transport equation using the Method of Characteristics approximation. It is inspired in OpenMOC, a program develo…

---

## [Finding roots of a complex transcedental function](https://discourse.julialang.org/t/finding-roots-of-a-complex-transcedental-function/53407)

<div class="topic-metadata">

**Author:** [@Jake](https://discourse.julialang.org/u/Jake)\
**Replies:** 0\
**Last updated:** [January 15, 2021, 9:01pm UTC](https://discourse.julialang.org/t/finding-roots-of-a-complex-transcedental-function/53407 "2021-01-15T21:01:28Z")

</div>

I am trying to do root-finding on a complex function. The function is a 3x3 matrix in the Laplacian domain. I would like to find the values of “s”, where the determinant of this matrix is zero. I am not sure what the …

[Previous page](https://discourse.julialang.org/latest.md?page=1519)

[Next page](https://discourse.julialang.org/latest.md?page=1521)