IJulia is a Julia-language backend combined with the Jupyter interactive environment (also used by IPython). This combination allows to interact with the Julia language using Jupyter/IPython's powerful notebook, which combines code, formatted text, math, and multimedia in a single document.
Questions tagged [ijulia-notebook]
198 questions
1
vote
2 answers
Julia - MethodError: objects of type Float64 are not callable
I'm currently learning Julia and i'm trying to translate a Fortran77 code, but i got this error message and i can't see from where the issue is coming from.
using DelimitedFiles, DataFrames
function diprcbk(iii,x,r)
if iii==0
df =…
Henrique
- 15
- 4
1
vote
1 answer
Random iteration in Julia Programming
When you want to iterate sequentially over a list of numbers from 1 to N in Julia you will write:
for i in 1:N
# do something with i
end
But what if you want to iterate over the list of numbers from the range (1...N) randomly? There is a need in…
Gua
- 33
- 5
1
vote
0 answers
How to output LaTeX/TeX Tikz packages inside Julia
I wanted to output Circuitikz inside my Julia Notebook, How do I install circuitikz to my notebook, Or how do I run Circuitikz inside my Julia code
using Latexify
using LaTeXStrings
str = L"""
\begin{center}
\begin{circuitikz}
\tikz \draw…
MrEbrahim XD
- 59
- 5
1
vote
0 answers
Speeding up Lyapunov Exponent Script
Im writing a script to calculate the Lyapunov exponent of a particular system with varying parameter. The code is ungodly slow and it hangs every so often when running on Jupyter Notebook. Any suggestions?
using DynamicalSystems, Plots
function…
Stev L
- 11
- 1
1
vote
1 answer
How is it possible to collect NLexpression in a loop?
Would you please help me that how I can collect some NLexpressions in a loop?
I Want to keep k8 and k9 for all i=1:10 as scenarios. It means in the end of the loop, Q equal to collection of k8 and k9 under each scenario ( i ). I couldn't define a…
Soma
- 743
- 6
- 19
1
vote
1 answer
Combine two columns into one in Julia DataFrames
I need some help due to my research about that topic was not satisfying.
I hope you guys can help me out.
Lets say we have a DataFrame like:
df = DataFrame(A = 1:10, B = 11:20, C = rand(10))
But now I want to join "A" and "B" into one single column…
Coco
- 77
- 3
1
vote
2 answers
How to measure execution time of entire jupyter notebook comprising of different cells in JULIA?
I have a script written in JULIA language in Jupyter notebook. The script is divided into different cells. I'd like to calculate the execution time of not only a single line or cell, but the entire script comprising all the cells. In Python, I could…
hbstha123
- 1,260
- 11
- 23
1
vote
0 answers
MethodError in Julia when using scatter! function
coordinate_distance(x,z) = abs.(x .- z)
square1(x) = sum(coordinate_distance(x,z).^2)
using Plots
LB,UB = 0,20 # Defining Lowerboud and Upperbound
plot(square1, LB, UB, legend=false)
scatter!(z, [square1(x) for x in z])
square1-custom…
Pradnk77
- 11
- 2
1
vote
0 answers
Why notebook does not work in julia on ubuntu?
I have installed julia (on ubuntu 20.04) and want to run it in notebook. For this I used:
Pkg.add("IJulia")
using IJulia
notebook()
But in the end it opens this:
[ Info: running `/usr/bin/snap notebook`
Process(setenv(`/usr/bin/snap notebook`;…
alexandra
- 11
- 1
1
vote
0 answers
Julia - Jupyter Notebook setenv does not work
Similar to this issue
I have installed Jupyter Notebook with IJulia.notebook(),
which works perfectly fine when I run it with '．．．/.julia/conda/3/bin/jupyter-notebook'.
However, when I attempt to run notebook() after prompting Julia, it just starts…
user15620366
- 41
- 5
1
vote
1 answer
"Not" not defined while using Julia DataFrames
While going through the tutorials of DataFrames from MLJ, I encountered the following error
julia> b2 = select(boston, Not(:NOx))
ERROR: UndefVarError: Not not defined
Stacktrace:
[1] top-level scope at none:0
Link to the tutorial:…
Sanjiban Sengupta
- 13
- 1
- 8
1
vote
2 answers
julia jump: declare array with variable upper and lower limit
I am trying to solve a sensitivity analysis using Julia (JUMP). I am stuck at the following problem:
I am trying to declare a variable that has both an upper and a lower limit to feed it to the lp_objective_perturbation_range function. That function…
true_shadow
- 11
- 2
1
vote
1 answer
how to subset a matrix randomly from a large matrix in Julia
I have a large matrix(28960×45807 Array{Float64,2}), where rows represent individuals and columns for snpID. now I want to get a subset matrix(28960x4580) that snps are selected ramdomly from large matrix.
how can I do it in Julia?
Shazman
- 11
- 4
1
vote
1 answer
Julia: how do I configure IJulia kernel to use specific environment?
I downloaded someone else's project and the structure is as follows:
project/
notebooks/
notebook_a.ipynb
notebook_b.ipynb
library/
Manifest.toml
Project.toml
src/
test/
In the notebooks I…
rodrigolece
- 1,039
- 2
- 13
- 19
1
vote
1 answer
How to use @constraintref correctly? In Julia Language
guys,I wrote the code and got the following error: @constraint is not defined. What did I wrong. How to fix it? Thanks
@constraintref restrição[1:2]
for j=1:2
@constraint(m, restrição[j], sum(A[j,i]*x[i] for i=1:3) <= b[j])`
end
```
Rodrigo Costa
- 31
- 1