Questions tagged [julia]

Julia is a high-level, high-performance dynamic programming language for technical computing. It addresses the two-language problem by combining the ease of use of languages such as R and Python with the performance of C and Fortran.

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1answer
67 views

How to record hardware and software info in Julia?

Watermark extension for Jupyter shows system and package information for reproducibility: ...
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0answers
13 views

Solving SDEs in R until a prespecified value is reached

I am trying to solve a system of SDEs in R using the Diffeqr package. A simplified version of the system: ...
3
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1answer
110 views

Solving an SDE with time-dependent parameter in R

I am trying to solve a system of SDEs in R using the Diffeqr package. Let's reduce the system to a simple ODE: ...
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0answers
501 views

Scalability of Julia language [closed]

The Julia language has caught my attention as I am a heavy MATLAB user, but would like more performance. Julia looks attractive as skipping the whole 'prototype in MATLAB then rewrite code in FORTRAN/...
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1answer
295 views

Plotting Excel data with Julia [closed]

Let me first be clear that I'm still new to Julia. I need to plot time series data contained in an Excel file using Julia. So far I couldn't find any packages for that. The only workaround I found ...
3
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1answer
113 views

Alternative to messy grid node indexing within multiple layers of loops

Recently,I dive into a set of somehow ancient Fortran codes and try to fully understand them. A large fraction of these codes are multiple layers of loops over many state variable dimensions, which ...
3
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1answer
104 views

Looking for saddle point in scalar function with multiple parameters

I have a real valued function, let's call it $f(\mathbf{x}, \mathbf{y})$, which I would like to maximise with respect to $\mathbf{x}\in\mathrm{R}^d$ and minimise it with respect to $\mathbf{y}\in\...
5
votes
1answer
149 views

Where does the floating point error come from? (Finite difference using matrix multiplication versus shifts and adding.)

In Julia it appears that one picks up some error terms when doing finite differences using matrix multiplication versus shifts and addition. ...
5
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0answers
317 views

Optimization on the manifold of stochastic matrices

So I have an optimization problem of the form $$\text{maximize}\hspace{3mm}f(A):{\bf R}^{K\times K}\rightarrow{\bf R}$$ $$\text{subject to}\hspace{19mm}A^T{\bf 1}=\bf{1}$$ $$\hspace{33mm}A\geq 0$$ ...
56
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4answers
9k views

How mature is the “Julia” scientific computing language project?

I'm considering learning a new language to use for numerical/simulation modelling projects, as a (partial) replacement for the C++ and Python that I currently use. I came across Julia, which sounds ...