Kwargs in new(), or safer ways of constructing immutable structs
When creating an immutable struct with a reasonable number of fields and an inner constructor, I find that aligning the arguments to new() with the order of the struct fields to be quite tedious and...
View ArticleFlux gradient not defined
Hi, I’m attempting to build a basic perceptron using Flux, and starting with the tutorial code in the documentation here [https://fluxml.ai/Flux.jl/stable/models/basics/]. Entering this code from the...
View ArticleJuno Project pane colors
Where is the documentation for the various colors of directories and files in the Project pane? They have something to do with the VC local repo status but I searched “colors” the Juno documentation...
View ArticleInitialize weights for Flux.Dense
Hello. I can’t figure out the syntax to initialize the weights for Flux.Dense. using Flux w0 = Float32[1, 2, 3, 4] nn = Dense(4, 1, relu; initW = w0) produces the following error. MethodError: objects...
View ArticleCan I customize the accumulator type and result type for my types separately?
In some cases of reduction operations, it may be useful to use special intermediate representations for speed and accuracy. A typical example is computing the sum of fixed-point numbers within the...
View ArticleVariance and std of vectors
In Julia Statistics module std() and var() work for arrays of numbers, including complex numbers - expectedly, they do not support arrays of vectors. However, it is often convenient to quantify the...
View ArticleExpressing a week before the time right now
Suppose I express the time right now as: rightnow = Dates.format(Dates.now(Dates.UTC),"Y-mm-ddTH:MM:SS.SSSZ") Now I need to express, in the same format, the time at some previous point, say, one week...
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Probably the dumbest question you'll get all day - Proper way to build a...
I feel so new! Even at my age! But… I’ve been watching Julia for a while and decided it a try on a real application. I come from Scala/Akka, C and C++, and a bunch of ancient languages. Julia has some...
View ArticleDifferential Equations Parameters not recognized when solving in newest packages
I’m having trouble with the updated DifferentialEquations Package (v6.15.0) and it’s dependency DiffEqBase (v6.50.9). I was recently working in a previous version Differential Equations (v6.12.0) and...
View ArticleWhat do ! mean for functions
My question is probably relatively basic, but I haven’t found any information about it anywhere. On the performance tips page, some functions have ! and some don’t. What is the meaning of ! and are...
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How to fix this error (first installation)?
I want to use Julia 0.6 with latest version of Atom/Juno. However, there is a below error during installation. Starting Julia… INFO: Precompiling module Atom. ERROR: LoadError: HttpParser not properly...
View ArticleDrWatson and github
I am taking my first steps with Dr.Watson. Any words of wisdom to share? Here is a question: When using @tagsave, I am saving and committing at the same time. But its utility depends on me making sure...
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Turing package(s) + parameter estimation for DiffEq models?
Are there any illustrative notebooks around on how to do proper model fitting of dynamic models with parameter statistics in Turing tools? Can it be done? To be more concrete… take the SIR...
View ArticleHow to export names from a lower level module without explicitly listing all...
I often organize code into modules inside a single package. Let’s say I have a pacakge named AB.jl, and inside I have modules A.jl, B.jl, all in the src folder. A nice way to organize them is...
View ArticleDifferences in these expressions?
When learning metaprogramming in Julia, I am a little bit confusing about these behavior like below julia> Meta.show_sexpr(:(:($(1+2)))) (:quote,(:$,(:call,:+,1,2))) julia>...
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Using group in scatter plots correctly?
Hello! I am trying to make a scatterplot where there exist two groups, one called “0” and one called “1”. The group values is stored in a vector “z”. Over time the points in group “0”, come to group...
View ArticleNo Julia in Jupyter
I’m using Fedora 29 and I have installed Jupyter into root directory. And I have installed JuliaPro to local directory. Then I installed IJulia package and it was a success and if I enter notebook() ,...
View ArticlePGFPlotsX - How to save figure?
Hello! I have some code as: p = scatter((data[1,id1],data[2,id1]), markersize = 3.5, markerstrokestyle = :dot, aspect_ratio=:equal, color = :orange, label = "Sick" );...
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Pixel plots in GR.jl
Hello everyone, I am trying to plot a pixel series in GR which might look something like this: In pyplot it is achieved by adding a ',' in the plot command (something like: ax.plot(x, y, ',')). In GR,...
View ArticleUsing SymPy.jl inside a module
I got the ERROR: ArgumentError: ref of NULL PyObject when I call a function defined inside a module that is using SymPy. seems like the situation is rather similar to this. Unfortunately I have...
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