How can I use Zygote to get the gradient
Hello, I am new here and i just add the pkg Zygote to find the gradient of the function (2+2*alpha-3)^2, i want to get the value of alpha how can i do that 7 posts - 3 participants Read full topic
View ArticleStrange behaviour with if-else-Statements
Hello, I’m new to Julia and working with Julia/JuMP for optimization purposes. I want to use if-else-statements in the constraints I’m defining to write them more compact. When trying so I ran in some...
View ArticleHow to change the return-value of homedir()
So I want to change the starting location in my file-tree when I use Jupyter. From what I understand, Jupiter opens up the file tree at the location returned by homedir(). So my question is, how can I...
View ArticleExport functions included from different modules with the same name
Here is my example: module AB using Reexport include("A.jl") include("B.jl") @reexport using .A @reexport using .B end And, both A, B has functions close!. Then, using close! causes warning like this:...
View ArticleCan't add GLM
Trying to add GLM and getting dependency errors. [StatsPlots, Distributions, etc.] I’m using Julia 1.2 (can’t change for other dependency reasons). Does anyone have any ideas? I tried to build but GLM...
View ArticleDictionary initialization
If I type the following in the REPL, I get what I expect: a dictionary with two elements. Note: I want the definition to be over two lines. cols = Dict([ "FID_NEW" => :fid_new, "POINT_X" =>...
View ArticlePackageCompile system image for different computers
I’ll like to compile a system image that I can use on our in-house compute cluster. My problem is that the image I build on one computer, will not load on an other. I have build a system image on my...
View ArticleHow to get the first row of each group of a DataFrame?
How do I get the first row from each group of a grouped DataFrame? Say, I want to find the sex and height of the tallest person in each age-group: using DataFrames df = DataFrame(sex =...
View ArticleUsing sequential conditions inside sum()
How to define sequential conditions inside sum() ? For example, embedding the block tot=0 for j in Set1 if (i,j) in Set2 condition1 if k in Set3[(i,j)] condition2 tot = tot + f(i,j,k) end end end...
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Could not download https://pkg.julialang.org/registries and cannot precompile...
Hi Julia users! As the new version came out and having a LOT of problems installing/precompiling CUDA.jl, CUDAnative.jl, CuArrays.jl, I decided to freshly reinstall Julia 1.5.2. However, I see the...
View ArticleGenerate a (mutable) struct which inherits others
Hi. Is there any way for a (mutable) struct to inherit fields from others? For example, what I’m trying to do is: mutable struct Parent foo bar end mutable struct Child <: Parent end and use child...
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Is `macro` "a compressed part of code"?
According to this, I’m trying to use macro for inheritance as @xiaodai suggested. However, I’ve not figured out how exactly macro works What I’m trying to do is basically “refering a struct’s fields...
View ArticleWhen do you all PyCall?
So I’ve been brushing up a little bit on my python, but doing so under the guise of julia projects that require/benefit from pycall so I don’t rust out any skills. Had me thinking, when do other...
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Faster array indexing with a logical array
Hi everyone, Pretty basic question… I was experimenting with indexing arrays with logical arrays. For instance, say I have an array shaped (10000,2) and I need to extract all the indices where the sum...
View ArticleIJulia/Jupyter Notebook in different language (Russian!) than expected
Hi, all! I’ve been following Julia for years now, but decided to completely dive in just recently. I’m planning to give a talk at my university on using Julia and wanted to show how to use it in...
View ArticleScraping a html table from a website
I am trying to obtain COVID-19 data from a website. The website has the data which I want but it is in a html table format I am looking for Julia tools to scrape the information from the html table....
View ArticleNo REPL output when editor code is run (remote julia process over sftp)
Steps to reproduce: open ftp pane to remote host click the start remote julia process tab open an editor file highlight a line of executable code (without a trailing “;”) hit ctrl+enter What settings...
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Error: Reducing over an empty collection is not allowed
Hi everyone, I am trying to sort and sum data based off of the first column of ‘DNVGL_total’ into a new array. However, when trying to do this, I get the error ‘Reducing over an empty collection is...
View ArticleHow to pass a relative UnitRange to a function?
I have the following which tries to apply a relative unit range to a string whose length is unknown: function testnums(data::String,numrange::String) data[numrange] end foo = "asdfasdfasdf" bar =...
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How to set number of threads for VS Code?
There are quite a few topics about this question but I am still confused after reading them. I am using VS Code for Julia Version 1.5.0. Currently, The documentation...
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