Unable to install fzf Error when trying to install OnMyRepl package
I had this issue when I tried to install OnMyRepl package on a fresh Julia 1.5.3. The same error appears when I tried to install the fzf_jll package separately. Downloading artifact: fzf curl:...
View ArticleJust discovered Julia
I hope this is the right place to put this. I am a mature, 38, student studying mathematics with the Open University in the UK. I have started exploring mathematical concepts with computing and...
View ArticleDonut charts with PlotlyJS
Hi all, I’m trying to produce a donut charts with PlotlyJS.jl to embed in a dash app. I’ve seen the Plotly docs but couldn’t find any related docs in the Julia API. Any hints to make that work with...
View ArticleWorkflow when experimenting with types
Hi all, longtime lurker and irregular Julia user here. Revise is absolutely great and I love it but I wonder if there’s a better workflow when experimenting with types. I try to get my types defined...
View ArticleSymPy/Symbolics and HCubature
Hi everyone! I was not sure whether to post it here or in the Numerics subforum, but given that my question is very basic I decided to go for this section. Let’s say I want to integrate some function...
View ArticleTrivial question about avoiding concurrency in a shared matrix between processes
Good evening everyone. As the title suggests, I have a very trivial question to ask (I’m a beginner with julia). In my code, I would like to have several (parallel) processes do calculations (quite...
View ArticleLeg = false?
Just a quick question, what does leg=false or leg=true mean, for example in the following command hline!([m, m+σ, m-σ], lw=3, ls=:dash, leg=false) I tried to set leg to true and false, but can’t see...
View ArticleHow to change arrays of a mutable struct
Hey there, I am currently trying to make a Dataset struct object that has new X and y values to it appended to it over time. This is my set up mutable struct Dataset{T<:Real} X::AbstractMatrix{T}...
View ArticleMAT.jl putting several tuples of variable string and variable in write()-command
Hi, given are two vectors: x, y Question: can I use one write()-command to save them to a mat- file, if I would like to use specific lables? write(file_id, "vec_x", x) write(file_id, "vec_sin", y) is...
View ArticleIssues encountered teaching classes with Julia for the first time
This semester, for the first time, I have assigned Julia as a required language in my Data Science classes, alongside R. While I am not a beginner to Julia, I am posting this here because I am a...
View ArticleUnexpected allocations when acessing field of struct
Hello, I don’t understand why any of the function calls underneath allocate memory on the heap. My reasoning is that these are unmutable structs, so when the functions are called, the type of field...
View ArticleI can't load RDatasets in Julia
On doing Iris = dataset(“datasets”, “iris”), I get the following error - Iris UndefVarError: load not defined action(::Symbol, ::Array{Union{Base.PkgId, Module},1}, ::FileIO.Formatted;...
View ArticleBest way to declare a structure field that could be a function or a number
Hello, I’m currently writing a PDE solver in julia, and I’m wrapping the inputs in a structure in order. Among these inputs is the initial condition V0 and can be either a constant or a function. My...
View ArticleCollapsing data into the level of certain variables and taking averages
Let’s say I have a data frame with columns A1,A2,A3,…,An, where A1,A2,A3 are categorical variables and the rest are floats. I want to create a new data frame (or equivalent) with the following...
View ArticleHow to do in place concatenation of matrices
Hi there. I have a matrix a that I want to maintain and accumilate more data points to over time. Assume I have a given below and I want to append b to it without having to do a new assignment on a....
View ArticleEasily make all variables 32 bit?
Hello, is there some way to force all implicitly declared variables from 64 to 32 bit? I know I can explicitly declare stuff as 32bit and write numbers as 1.0f0. But I’d like to test the accuracy I...
View ArticleWorker thread setup in Julia compared to C++/pthreads
I’m trying to port some code (a 3D renderer) that in C++ uses a simple tasking system to process items of work using multiple OS-level threads. Each item can (and will) take a varying amount of time...
View ArticleGetting Single trajectory data from parallel ensemble simulation
(topic withdrawn by author, will be automatically deleted in 24 hours unless flagged) 1 post - 1 participant Read full topic
View ArticleWhy const changes the behavior of Ptr?
In the docs: julia> const s1 = "1" "1" julia> s2 = "1" "1" julia> pointer.([s1, s2], 1) 2-element Array{Ptr{UInt8},1}: Ptr{UInt8} @0x00000000132c9638 Ptr{UInt8} @0x0000000013dd3d18 julia>...
View ArticleError message: ENOTSUP
I am new to Julia. I am trying to add packages in JuliaPro. For example I do this: using Pkg Pkg.add(“DataFrames”) and the following error message pops up: ERROR: IOError: mkdir: operation not...
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