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JULIA QUESTIONS

Using a macro to generate a Julia command to be executed in the REPL
Using a macro to generate a Julia command to be executed in the REPL
With these it helps As far as I understand (and I'm not sure what the printing does in your example), you want a macro that expands
TAG : julia
Date : November 20 2020, 07:00 PM , By : Jorge Alvarez
Updating a particular column of an array
Updating a particular column of an array
hop of those help? The following code does what I need it to do, but since I am bound to have the same task in future codes, I would like to know what the best way to achieve the outcome is: , There are many ways like:
TAG : julia
Date : October 25 2020, 07:10 PM , By : DillyDalion
Using findall with multiple criteria
Using findall with multiple criteria
I wish this help you You're forgetting to dot the | operator. But you also need to use parens:
TAG : julia
Date : October 25 2020, 07:10 PM , By : Maneesha Shivakumar
Supressing some labels in legend or putting sampled markers
Supressing some labels in legend or putting sampled markers
I wish did fix the issue. I re-read the docs and found that for the attribute label of Series:
TAG : julia
Date : October 23 2020, 06:10 PM , By : adaadamad
Specializing method calls in order in meta-programming
Specializing method calls in order in meta-programming
help you fix your problem I usually find it easier to work with expressions in macros (it is not the shortest way to write things, but, from my experience, it is much easier to control what gets generated).Therefore I would rewrite your code as:
TAG : julia
Date : October 20 2020, 06:10 PM , By : Mark Craypo
Why Juila module have to be prefixed with dot?
Why Juila module have to be prefixed with dot?
around this issue Because you define module A inside your current module. The dot means "look inside the current module for this". https://docs.julialang.org/en/v1/manual/modules/Relative-and-absolute-module-paths-1
TAG : julia
Date : October 17 2020, 06:10 PM , By : riley8848
Function chaining in Julia
Function chaining in Julia
Does that help Is it possible to write multiple function calls as a chain? , After searching, this seems to be the best option available
TAG : julia
Date : October 15 2020, 06:10 PM , By : Alexbed7
How to instantiate a struct in Julia where I have the struct name in a string variable?
How to instantiate a struct in Julia where I have the struct name in a string variable?
wish of those help I would recommend not doing it in production code, but you can do the following:
TAG : julia
Date : October 14 2020, 12:00 AM , By : jenderny
Left and right eigenvectors in Julia
Left and right eigenvectors in Julia
should help you out The left eigenvectors can be computed by taking the inverse of the matrix formed by the right eigenvectors:
TAG : julia
Date : October 13 2020, 09:00 PM , By : programmer1837
Log axis appearance in julia/Plots
Log axis appearance in julia/Plots
this will help As it has been told in the discourse topic, the default tick behavior (for most backends) is different than what you expected.There is a way you can achieve the tick behaviour you want. You can manually set tick positions and tick labe
TAG : julia
Date : October 13 2020, 10:00 AM , By : Parth Bhimani
Connecting to the CPLEX remote API with julia
Connecting to the CPLEX remote API with julia
seems to work fine Many things could go wrong here. I don't know Julia but here are the things that could try outside of Julia to sort this out: You definitely need passwordless ssh connection. There is no way you can supply username/password with th
TAG : julia
Date : October 13 2020, 08:00 AM , By : jack hu
Understanding the step cannot be zero error in Julia Language?
Understanding the step cannot be zero error in Julia Language?
I hope this helps you . It sounds like you want to map or broadcast : over the elements in the two arguments. Just do it explicitly:
TAG : julia
Date : October 12 2020, 06:00 AM , By : Steve
Convert a 1-based array to a 0-based array in Julia
Convert a 1-based array to a 0-based array in Julia
this will help I'm posting a self-answer because the question was answered by Bogumił Kamiński in the comments.There is some user-level documentation here, though at the time of writing it is rather short and consists entirely of examples, so one has
TAG : julia
Date : October 12 2020, 04:00 AM , By : PVS5033
Julia MethodError Array Int64
Julia MethodError Array Int64
around this issue Array(Int64, 0) would create an empty Int64 1D array (i.e. Vector) on older versions (probably pre-0.6 era).Now, to create an empty Int64 1D array, you can use any of
TAG : julia
Date : October 12 2020, 02:00 AM , By : Lucy Day
How to pass optional argument to operator in Julia
How to pass optional argument to operator in Julia
it fixes the issue You have to use prefix function call syntax in order to pass keyword arguments to the function. The @test macro provided by the Test standard library allows you to supply keyword arguments to ≈ by adding trailing key=val pairs like
TAG : julia
Date : October 11 2020, 09:00 AM , By : Juan Contardo
julialang: can (should) this type error be caught at compile time?
julialang: can (should) this type error be caught at compile time?
wish help you to fix your issue Julia is a dynamic language in this sense. So, no, it appears you cannot detect if the result of an assignment will result in such an error without running the function first, as this kind of type checking is done at r
TAG : julia
Date : October 11 2020, 08:00 AM , By : Kenny Craig
How to create create a 0-1 combination of n arrays with specific condition in Julia
How to create create a 0-1 combination of n arrays with specific condition in Julia
With these it helps Why do you need to materialize that entire array? It's much better to create each combination on the fly when you need it, or create an iterator that gives you the permissible rows one at a time. In the discourse post you link, St
TAG : julia
Date : October 11 2020, 01:00 AM , By : David Z
I need to use the exact version of Julia V1.0.0, where can I find it?
I need to use the exact version of Julia V1.0.0, where can I find it?
Hope that helps If the package you are after is not working with 1.0.4 there are solid chances that it will not work with 1.0.0 either, or that it is relying on an unintended feature, colloquially also known as bug.However, to get binaries for differ
TAG : julia
Date : October 10 2020, 09:00 AM , By : Jirat
Julia DataFrame ERROR: BoundsError attempt to access attempt to access a data frame with X rows at index false
Julia DataFrame ERROR: BoundsError attempt to access attempt to access a data frame with X rows at index false
this one helps. Just to mention other options note that you can use the filter function here:
TAG : julia
Date : October 10 2020, 08:00 AM , By : Santiago Galeano
Julia: How do I copy a DataFrame to the system clipboard?
Julia: How do I copy a DataFrame to the system clipboard?
This might help you Use the sprint() and show() functions in combination around the DataFrame first, as below:
TAG : julia
Date : October 10 2020, 08:00 AM , By : Prajeet Thakur
1D integration with multivariable function input
1D integration with multivariable function input
Hope this helps To demonstrate, let's start with a simple multi-variable function f(x,y) = xy^2. , In such case it is simplest to use an anonymous function wrapper:
TAG : julia
Date : October 10 2020, 07:00 AM , By : Jonatas Lenon
How to access to the package contents of Julia in Mac? It's easy to find the package content in Windows but I can't find
How to access to the package contents of Julia in Mac? It's easy to find the package content in Windows but I can't find
To fix the issue you can do Package installations are (supposed to be) immutable, and in fact the files are set to read-only mode, so you are not supposed to modify what is in the $HOME/.julia/packages/ folders.If you want to make changes you should
TAG : julia
Date : October 10 2020, 02:00 AM , By : Brasa Santos
Creating matrix of draws from vector of distributions
Creating matrix of draws from vector of distributions
Hope that helps I have a vector of n distributions and I am trying to create a n x t matrix of t draws from each of the n distributions. , Try double indexing of a comprehension:
TAG : julia
Date : October 10 2020, 01:00 AM , By : Thomas
Julia: is a function that receives a Dict as input and output a Dict type stable?
Julia: is a function that receives a Dict as input and output a Dict type stable?
wish helps you A Dict{String,Any} should, because its values will be "boxed" by Julia, be technically slower than a fully typed structure. However, your function is going to spend most of its time calculating and only will put the results in the boxe
TAG : julia
Date : October 08 2020, 06:00 PM , By : Alyda
How could I use structure type in a function to calculate the time?
How could I use structure type in a function to calculate the time?
I wish did fix the issue. If you want to stop the time some code needs without writing it as functions you can just use begin end blocks
TAG : julia
Date : October 07 2020, 09:00 AM , By : Vinnie Sklep
How to get the maximum and minimum values of a given type
How to get the maximum and minimum values of a given type
wish of those help For questions like this, you will be best served by looking at the julia docs https://docs.julialang.org/en/v1/base/base/Base.typeminSpecifically for this question, typemin(Int), and typemax(Int) should do what you want.
TAG : julia
Date : October 06 2020, 08:00 PM , By : Jiang Yangbo
Julia 1.1.1 - absolutely global variables
Julia 1.1.1 - absolutely global variables
To fix this issue In Julia the rules for accessing variables from other modules are explained in detail here.The key issues in your situation are the following things:
TAG : julia
Date : October 06 2020, 07:00 PM , By : mcpublic
How can I conditionally select and then mutate columns of a DataFrame?
How can I conditionally select and then mutate columns of a DataFrame?
Hope that helps Here it is. The code converts columns with any integer number types (such as Int64, Int32) to a Float64.
TAG : julia
Date : October 06 2020, 07:00 AM , By : Basawaraj Bhorkade
How do I slice an array by index in julia
How do I slice an array by index in julia
wish helps you So say a=[[1 2];[3 4];[5 6]] and x is [1,2,1] how would I extract the vector [1,4,5]; that is, the index-x element of each row. , You can use broadcasting. Use Ref(a) to avoid broadcasting over a:
TAG : julia
Date : October 05 2020, 07:00 PM , By : Kristine Miñoza Baya
I cannot add a github repository to Julia
I cannot add a github repository to Julia
I wish did fix the issue. Do you have git installed in your system? Which OS are you running? Have a look at the git website on how to install it for different OS's.Try running the command Pkg.Status() and see if you find anything meaningful. If you
TAG : julia
Date : October 05 2020, 03:00 PM , By : Dab1001
How to read the last x bytes of a (binary) file in Julia?
How to read the last x bytes of a (binary) file in Julia?
With these it helps Found it: seek to the end of the file, read the new offset, and seek to that offset minus 128 and "skip" -128 bytes:
TAG : julia
Date : October 05 2020, 03:00 PM , By : Miquéias
ArgumentError: New columns must have the same length as old columns
ArgumentError: New columns must have the same length as old columns
hope this fix your issue This is the way to create tab DataFrame you want (assuming you want periodos and familias columns to contain constant values):
TAG : julia
Date : October 04 2020, 10:00 PM , By : Lester Santiago
Why does Julia have `Base.invokelatest`?
Why does Julia have `Base.invokelatest`?
help you fix your problem Consider the following example, Where a function bar uses @eval to redefine foo before calling it
TAG : julia
Date : October 03 2020, 07:00 PM , By : Christian Heijmann
How to change the name of a variable in a for loop
How to change the name of a variable in a for loop
I think the issue was by ths following , As others have said, it's a bit questionable whether one should do this, but if this is really what you want to do, here's how you can do it:
TAG : julia
Date : October 03 2020, 06:00 AM , By : Mark Delacruz
When should i use `==` vs `===` vs `isequal`
When should i use `==` vs `===` vs `isequal`
hop of those help? === is the built-in equality. On primitives, it is value equality: if they have the same bit level representation then they are equal. On mutable structs, it is referential equality: things are equal if they are the same memory loc
TAG : julia
Date : October 02 2020, 01:00 PM , By : Nicolas
Repeat a function call N times
Repeat a function call N times
This might help you What's the easiest way in Julia to call a function n times, with the same arguments, and return the result in an array? For example, I'd like to get an array of random strings, each of a certain length. The best I've been able to
TAG : julia
Date : October 02 2020, 09:00 AM , By : Rajiv Vaidyanathan
How can I deactivate?
How can I deactivate?
I hope this helps you . To go back to the default environment, use activate with no arguments:
TAG : julia
Date : October 02 2020, 08:00 AM , By : Charbel Jamous
Read the inputs of a user-defined function in Julia?
Read the inputs of a user-defined function in Julia?
it fixes the issue I'm not sure exactly what you're looking for, but if you want to know what kinds of arguments your userfunction takes, you can get that.First, remember that userfunction can have multiple method, each with different arguments (yay,
TAG : julia
Date : October 02 2020, 07:00 AM , By : Badreddine Meherzi
What is the difference between fields and properties in Julia?
What is the difference between fields and properties in Julia?
should help you out Julia has the setter functions setproperty! and setfield! and the getter functions getproperty and getfield that operate on structs. What is the difference between properties and fields in Julia? , fields are simply the "component
TAG : julia
Date : October 01 2020, 02:00 AM , By : Yogesh
Julia: How to execute some code on exit of a function? E.g. lik R's `on.exit`?
Julia: How to execute some code on exit of a function? E.g. lik R's `on.exit`?
This might help you I have a piece of code that I run and I want to execute some code on the exit of a function, e.g. to close a connection. , For this particular example you would probably use a do block:
TAG : julia
Date : October 01 2020, 02:00 AM , By : Maciek Handwerker
Terminal Velocity using Differential Equation
Terminal Velocity using Differential Equation
around this issue There are several errors in your example. Most of them are not very related to programming but to physics and mathematics. You are disregarding a sign-change in the drag term. Also, the drag term you specified in your F equation has
TAG : julia
Date : September 30 2020, 08:00 PM , By : Thibaut Treder
Getting index of subarray in Julia
Getting index of subarray in Julia
help you fix your problem Judging by the name of the function you might be mislead: getindex retrieves the value stored at an index.If you want to find the index of something in an array you can make use of find* methods findfirst, findall...
TAG : julia
Date : September 30 2020, 04:00 PM , By : Einstein
Running into an issue with using a variable as an exponent in Julia
Running into an issue with using a variable as an exponent in Julia
I hope this helps you . This is common to several programming languages, not just Julia: exponentiation has a higher precedence than subtraction or negation. For Julia, you can see the list table of operator precedence here: https://docs.julialang.or
TAG : julia
Date : September 30 2020, 03:00 PM , By : medi plus
How to disable @assert in Julia
How to disable @assert in Julia
With these it helps There is no built-in option / command line flag to disable @asserts globally, yet(!).For now, you can define a @myassert macro which, depending on a global switch, is a no-op or a regular @assert:
TAG : julia
Date : September 30 2020, 07:00 AM , By : Rachel Rivera
How to save a file in Julia
How to save a file in Julia
will help you Since you mention @save, presumably, you were using JLD.jl or its successor JLD2.jl.A simple example for using JLD2 would be
TAG : julia
Date : September 29 2020, 08:00 PM , By : Phan Cuong
What's wrong with this Julia function?
What's wrong with this Julia function?
This might help you You’ve defined a function, createA, taking no arguments and then call it with one argument, which doesn’t work, of course. Try declaring the function as function createA(keg) instead.
TAG : julia
Date : September 29 2020, 07:00 PM , By : N. Soto
Julia: What is undef in Array in Julia
Julia: What is undef in Array in Julia
With these it helps First, you want to understand what is a constructor: For that, I suggest you the Julia doc: Constructors in JuliaNow that you have the theory, let's break apart this expression:
TAG : julia
Date : September 29 2020, 01:00 PM , By : Mogh
How to pass an array of objects to a function in julia?
How to pass an array of objects to a function in julia?
hope this fix your issue I want to pass an array of objects to a function and return another array of the same size. How should I do this ? The code should be so fast. For example consider the below code: , You can leverage Julia's broadcasting synta
TAG : julia
Date : September 29 2020, 02:00 AM , By : Sajith Nair
Sum under main diagonal in julia
Sum under main diagonal in julia
Hope that helps You're looking for the LinearAlgebra module, which is part of the standard library and contains a tril function:
TAG : julia
Date : September 28 2020, 09:00 PM , By : Zhigang
How to halt a loop in Julia and printing the ErrorMsg at the same time without using any macros?
How to halt a loop in Julia and printing the ErrorMsg at the same time without using any macros?
I hope this helps . To address your first question, you can use break to exit the while loop, like
TAG : julia
Date : September 28 2020, 08:00 PM , By : HariP
How to make use of Threads optional in a Julia function
How to make use of Threads optional in a Julia function
wish helps you You could use a macro that changes its behavior depending on the result of Threads.nthreads():
TAG : julia
Date : September 28 2020, 03:00 PM , By : Lucas Santos
Is there a way to swap columns in O(1) in Julia?
Is there a way to swap columns in O(1) in Julia?
fixed the issue. Will look into that further Following up on @longemen3000's answer, you can use views to swap columns. For example:
TAG : julia
Date : September 28 2020, 03:00 AM , By : Tyler Wright
How to flatten a 2D array in julia?
How to flatten a 2D array in julia?
it fixes the issue You can use vec (https://docs.julialang.org/en/v1/base/arrays/Base.vec):
TAG : julia
Date : September 28 2020, 02:00 AM , By : Alexander Z.
Maximum with a custom ordering
Maximum with a custom ordering
help you fix your problem While maximum does not support by keyword, it does support a "transformer" function. In this particular case, we can find the maximum of the reversed elements, and then reverse it back:
TAG : julia
Date : September 27 2020, 05:00 PM , By : Miguel Barocchi
understanding JuMP in Julia Lang?
understanding JuMP in Julia Lang?
it fixes the issue In order to apply a scalar function (like Jump.value) to a vector or array, you need to use the dot notation for broadcasting. So you need to replace all of your value(...) calls with value.(...).
TAG : julia
Date : September 26 2020, 07:00 PM , By : bojin
How can I view profiling information visually in Julia?
How can I view profiling information visually in Julia?
wish help you to fix your issue ProfileView relies on Gtk, which can be a pain to setup. Luckily, there are at least three good alternatives:PProf.jl (browser)
TAG : julia
Date : September 26 2020, 10:00 AM , By : Ashish
Save array of arrays, HDF5, Julia
Save array of arrays, HDF5, Julia
I think the issue was by ths following , You can flatten the array of arrays to one single array where one column contains the original data, and another column denotes which i-th array this data was originally from.
TAG : julia
Date : September 26 2020, 06:00 AM , By : Bharati Kambhampati
How to run a Julia file and see all subsequent functions that are called?
How to run a Julia file and see all subsequent functions that are called?
This might help you This is certainly not what you want but I'll archive the idea here anyways.If you run julia --trace-compile=calls.txt myscript.jl with myscript.jl being
TAG : julia
Date : September 26 2020, 03:00 AM , By : Erald Kuka
How can I export multiple methods of the same function from submodules within my module?
How can I export multiple methods of the same function from submodules within my module?
like below fixes the issue You have to make them the same function. thing can't mean two different things in the same namespace. For instance:
TAG : julia
Date : September 26 2020, 12:00 AM , By : RichardDL
why do i get MethodError: objects of type Float64 are not callable?
why do i get MethodError: objects of type Float64 are not callable?
I wish this help you You need to provide all the information needed to run the function and reproduce the error. What is q, na, mask? What is pdet0?
TAG : julia
Date : September 25 2020, 05:00 PM , By : Olivier Barrenton

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