Questions tagged [julia]

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5
votes
1answer
63 views

How to record hardware and software info in Julia?

Watermark extension for Jupyter shows system and package information for reproducibility: ...
0
votes
0answers
12 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
votes
1answer
106 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: ...
2
votes
0answers
491 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/...
1
vote
1answer
286 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
votes
1answer
112 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
votes
1answer
103 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
148 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
votes
0answers
308 views

Optimization on the manifold of stochastic matrices

So I have an optimization problem of the form $$\text{maximize}\hspace{3mm}f(A):{\bf R}^{K\times K}\rightarrow{\bf R}$$ $$\text{subject to}\hspace{19mm}A^T{\bf 1}=\bf{1}$$ $$\hspace{33mm}A\geq 0$$ ...
55
votes
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 ...