Segfault while loading images in multiple threads
Hello, I tried to process images in parallel but the load operation results in a Segmentation Fault. Is loading images not thread safe? using Images, FileIO Threads.@threads for path in readdir("img";...
View ArticleAutocomplete dataframe columns names not working in jupyter
Hi there, julia newbie here, switching from python :). I am using jupyter and dataframe package. Please, is there a way how to achieve autocomplete columns name in jupyter? ie, having frame =...
View ArticleCreate vector from Array
If I have an array, how do I create an array containing all values? (Personally, I do not care about the order, but for future references that might be useful as well) 3 posts - 2 participants Read...
View ArticleA bit of help with objects and arrays
Hi Everyone I am yet another new Julia language user and I come from a C/Fortran background. So I am pretty weak with some of the object concepts and advanced array syntax. (I will figure it out). I...
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Scope of parametric types and associated error messages
Hello, first post here. Sorry it’s so long. I’m a little confused about the errors I’m getting with different levels of type annotations on a struct with an inner constructor. I have actually solved...
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Exploring package contents
Hi I’m getting into Julia and I don’t yet understamd how I can find out what I can type. For instance I want to read CSV, so I add the CSV package, but then how do I know how to use it? In C# I would...
View ArticleHow to connect to Cassandra db from Julia
Hello, I am a newbie to julia. I want to access to Cassandra db from julia. I already tried this cqldriver(https://github.com/r3tex/CQLdriver.jl) by adding the package as Pkg.add(“CQLdriver”) but...
View ArticleForwardDiff with function using broadcasting
I am trying to use ForwardDiff to check some analytic gradients for a mse loss and logistic hypothesis function. So just looking at the loss of a single data point we have mse(x) = (1/2)*((y -...
View ArticlePerformance when using DifferentialEquations.solve repeatedly inside a loop
I am using the split step method to solve the following equation: i \frac{\partial \psi}{\partial t} = -\frac{1}{2} \frac{\partial^2 \psi}{\partial x^2} - |\psi|^2\psi + i \alpha\left(\frac{\partial^3...
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Myid() does not work as expected in @everywhere
I’m running the following code in Visual Studio Code: using Distributed, Plots addprocs(3) @everywhere begin using Plots x = [0, 300] y = [0, 300] p = scatter(x, y) title!(p, "Process: $(myid())")...
View ArticleChange Optimization Level in VS Code?
Hi! I changed from Atom to VS Code, and there is a setting option in Atom which allows one to change the optimization level used in Julia when compiling code. Where do I find this setting in Julia? I...
View ArticleConvert dataframe to runnable Julia code?
How would I convert a dataframe to Julia code? I have a dataframe containing these in a notebook, and I want Julia code that when run, produces a dataframe with the same contents. 10 rows × 12 columns...
View ArticleConfusing Julia & JuliaPro environment variables
What should i add for Julia & JuliaPro in environment variables ( windows 10 ) 2 posts - 2 participants Read full topic
View ArticleWhere to put files used in src/test?
A couple of my unit tests read sample configs from external files (which also serve as examples for how to write user config files for various functions). Is there a convention on where to put these...
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Graph processing framework
Hi everyone, I am new to Julia as of my final university project. I have been tasked with creating a graph processing framework similar to the Ligra API in C++. Does anybody have any tips or ideas? I...
View ArticleDefine data-dependent function, various ways
This is a topic that is frequently raised here (I have asked this before). The problem is that of defining a function that will be input as a parameter for a solver, but the function depends on data...
View ArticleRecommended serialization interface in Oct 2020: JLD, JLD2,
Obviously a corporation like Mathworks (for all its limitations) shines in its ability to define an official serialization interface: .mat (complexity of .mat versions aside) Is there any plan to do...
View ArticleConfusion about type stability of function within a struct
I have a struct called Operators that contains a bunch of functions. However, I can’t get it to be type stable. I have read Type Unstable: Function within a Struct and implemented the solution but it...
View ArticlePossible "multiple dispatch" due to API differences between package versions?
hi there, I am wondering whether it is possible to have one function having multiple dispatches simply due to the API changes between package versions. For example, the newest version of ODBC.jl...
View ArticleIn what way are Julia sets immutable?
If I create a set in Julia, then Julia will tell me that the set is immutable. julia> pets = Set(["dog", "cat", "budgerigar"]) Set{String} with 3 elements: "cat" "budgerigar" "dog" julia>...
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