Julia is a high-level dynamic programming language designed to address the requirements of high-performance numerical and scientific computing while also being effective for general purpose programming.
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Parsing simple log files in Julia vs Python
I wrote a log parser in Python and Julia. The Python version takes about 8 seconds to process 350 files, while the Julia version takes about 8 seconds to compile, after which it takes over 20 seconds ...
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0answers
65 views
Idiomatic string from/to integer conversions in Julia (Project Euler #33)
I am starting to learn Julia. For getting fluent in the syntax, I am solving some of the easier Project Euler challenges. Problem 33 is about so-called curious fractions, which keep their value after ...
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1answer
42 views
Saving the values of all variabled declared in a block
Often when running exprimental code to empirically investigate an algorithm, you tweak a parameter, then rerun the code, and generate a bunch of saved models for various parameters.
To make sure I ...
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5answers
928 views
Benchmarks of various scientific programming languages for theoretical modelling
For a theoretical modelling course for biology students, I am trying to decide which would be the best technical programming language for doing evolutionary simulations in terms of elegance and ...
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votes
1answer
157 views
Speeding up OpenCL matrix-vector multiplication
So I'd like to get a performance boost above and beyond standard Julia matrix-vector multiply, using my Intel HD Graphics 4000 1536 MB GPU, but I can't do better than an order of magnitude worse ...
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1answer
70 views
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0answers
46 views
Using RemoteChannels for an parallel iterable map
RemoteChannels hit with julia v0.5
There are no examples online, but I managed to get them to work.
They are still very new, and all this whole area of multithreading code continues to have running ...
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1answer
130 views
Sort Algorithms in Julia
Similar to this question here, I am trying to implement sort algorithms in Julia, as part of a package.
The code for the implementation is as follows:
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3
votes
2answers
185 views
Search algorithms in julia
I've been trying to implement the basic search algorithms: Sequential search for ordered and unordered arrays and the binary search algorithms, as part of a package.
So, this is the implementation:
<...
3
votes
1answer
66 views
Computing the double Integral using MonteCarlo techniques using Julia
I decided to try and learn Julia for doing scientific computing, and I decided to tackle the problem of finding
$$ \int_{D_{\frac{1}{4}}} x^4 + y^2 dA $$
where \$ D_{\frac{1}{4}} \$ is the part of ...
5
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1answer
84 views
Implementing cat function in Julia
I wanted to implement the cat function in Julia and I ran a few test cases but I am not sure if I am missing anything:
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0answers
159 views
Flattening lists of Vectors and Matrices into arrays
For many optimisation methods the parameters must be given as a single vector, such as Optim.jl. But for many interesting functions the parameters/coeffients to be optimised are matrices, or a mixture ...
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votes
2answers
134 views
Latent Dirichlet Allocation Posterior Inference
I have implemented Latent Dirichlet Allocation in Julia. Since the code is rather long, I copied the essential part here but the complete code can be found on GitHub.
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4
votes
0answers
81 views
Kernel density regression in Julia
Here is a naive implementation of a kernel density regression algorithm in Julia.
The code works, but there is quite a bit of room for improvement though. First, there is not an optimal bandwidth ...
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votes
0answers
26 views
Iterative procedure to get 3D coordinates from distance constraints
Imagine you have a series of n points randomly generated in a box in 3D space. You also have a list of distance bounds, e.g. points 5 and 3 should be between 1.0 and 2.0 Angstroms apart.
There are ...
5
votes
1answer
150 views
Terry Feagin's 10th order explicit Runge-Kutta method
The following Julia code implements Terry Feagin's 10th order explicit Runge-Kutta method (a more accurate cousin of RK4). Though the structure of the code is quite simple (i.e. no cyclomatic ...
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1answer
297 views
Functions for outputting the rows and columns of a matrix
I often want to iterate either row-wise or column-wise though a matrix in Julia, so I've created a pair of functions to help:
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1answer
205 views
Individuals reproduce and mutate
How can I improve the performance (in terms of computation time) of this code?
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2answers
352 views
Julia RPN calculator algorithm ported from Python version
I've just finished the Reverse Polish Notation task in Julia from rosettacode.com by porting the existing Python code.
There are only a few lines I don't get how to port:
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1answer
185 views
Neural Network in Julia
I am currently trying to implement a Neural Net in Julia with the goal of eventually implementing a stacked autoencoder. My code seems to work but I would appreciate any constructive criticism. If ...
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1answer
190 views
Speed optimization for girth-counting algorithm
I have the following girth-counting algorithm on a large 0-1 matrix and I need to optimize it for speed:
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2answers
919 views
Neural Network appears to be slow
I have some neural network Julia code which I'm hoping to speed up. It's possibly simply poorly-designed, but I'm not convinced.
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