Basic introduction to ssh-agent, libGit2 in the context of Pkg
This thread (and this, and this, and this) discuss a situation where something called “ssh-agent” is involved in preventing Pkg.add() from repeatedly requesting to override the private key location...
View ArticleHow to declare an 1-dim Array of 310 1-dimensional Arrays with Int32 elements
I’m trying to declare a 1-dimensional Array of 310 1-dimensional arrays with an unspecified number of Int32 elements. I thought Array{Array{Int32}}(310) was correct (at least circa 2017), but it...
View ArticleWhy making a change in a copy of a variable changes the original variable?
I am so confused now. Can you explain this to me: aa = [1,2,3] bb = aa bb[1,1] = 66 Output: bb = 3-element Array{Int64,1}: 66 2 3 aa = 3-element Array{Int64,1}: 66 2 3 I am only making a change in bb,...
View ArticleHow to change the color of bars in boxplot Gadfly and add minor ticks in the...
Hi, please how could I change the color of the bars of the boxplot below, from deepskyblue to RGB = [0,9, 0,4, 0.2]? And how could I add a few minor ticks in the vertical axis, if possible pointing...
View ArticleWarnings upon loading a custom sysimage
I have a script (simplified a bit here) that I use to make a custom sysimage with over 100 packages, including Weave. It has been amazingly useful for speeding up development / tests and works great....
View ArticleMultiple terminals open with Julia on macOS
I’ve installed the Julia .dmg file. Whenever I open the app, however, another normal terminal opens at the same time. Is this the expected behavior? If not, is there a way to tweak things so only the...
View ArticleJulia PyPlot: how to use multiple linestyles
Hello, I am not quite into pyplot and I could not find a good tutorial (there is pyplot, but only for python). I am trying to plot some results and I would like to use different linestyles. But I get...
View Article2-step guide for github repos with Pkg
Sufficient conditions for 1 and 2 to “just work” you are using some version of linux you ran ssh-keygen and hit enter until the prompts stopped ensure that ~/.ssh/id_rsa exists afterward you have...
View ArticleJulia PyPlot: how to assign multiple colors to legend
Hello, I am assigning the color of a plot drawn with PyPlot manually, I need to assign the same color to the legend. How can I control the color parameter? I am using the following but it gives me an...
View ArticleConfused by different behavior of assignments of Arrays and Numbers
Hello, everyone, This is rudimentary, but I’am confused about Julia’s different “=” behaviors for Numbers and Arrays. To my understanding, when we assign a variable to an object, we set the variable...
View ArticleThe Scaling and centering Matrices
With what package and Julia functions the Scaling and centering Matrices is performed? 4 posts - 4 participants Read full topic
View ArticleWhy no mutating filter function for strings?
Is there a reason why julia> str = " a" " a" julia> filter(isspace, str) " " works but julia> filter!(isspace, str) ERROR: MethodError: no method matching filter!(::typeof(isspace), ::String)...
View ArticleWhich should I use `__init__` or `deps/build.jl`?
I’m writing a module which has a CSV file as data, and should be expanded and processed to DataFrame and saved as JLD2 file. However the data size of the generated JLD2 file is much larger than...
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How to mix Markdown and Interact.jl?
I tried my first steps on WebIO + Interact.jl by function app(req) mymarkdown = md""" # Hello, Markdown! ## Lorem ipsum * Point 1 * Point 2 Cauchy-Schwartz inequality: $$\left(\sum_{k=1}^n a_k b_k...
View ArticleHow to create, run and then debug a basic Julia project?
Hi Is there any source to explain how to create a Julia project, preferably in VSCode. I try to lean my first steps and I still havent figured out how to do a basic toy project with a few functions on...
View ArticleConstrained type parameters
When defining a type, is it possible to place a constraint on parameter values? For example, consider the following simple type definition: struct Orf start::Int32 stop::Int32 pol::Int8 end Is there...
View ArticleHorizontally stacking a data frame (i.e. rows next to each other)
(topic withdrawn by author, will be automatically deleted in 24 hours unless flagged) 1 post - 1 participant Read full topic
View Article2D Structured Mesh Generator
This is more of a programming question than a Julia question… I am trying to create a 2D structured mesh generator for an arbitrary domain shape of square elements. There are probably packages...
View ArticleRoots package complex roots
I am using the Halley’s method in the Roots.jl package and I have given a MWE below. I would like to clarity two points: 1. How can I specify that if roots are complex then it should return NaN? 2. I...
View ArticleTableOperations.select
Hi, I have been making use of the Arrow.jl library and am currently experiencing difficulty in attempting to obtain a subset of columns from the original (Arrow) table and writing to another, via the...
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