Search Results for author: Colin Fox

Found 4 papers, 2 papers with code

Parsimony and the rank of a flattening matrix

no code implementations29 Nov 2021 Jandre Snyman, Colin Fox, David Bryant

The standard models of sequence evolution on a tree determine probabilities for every character or site pattern.

Multilevel Delayed Acceptance MCMC with an Adaptive Error Model in PyMC3

no code implementations10 Dec 2020 Mikkel B. Lykkegaard, Grigorios Mingas, Robert Scheichl, Colin Fox, Tim J. Dodwell

Uncertainty Quantification through Markov Chain Monte Carlo (MCMC) can be prohibitively expensive for target probability densities with expensive likelihood functions, for instance when the evaluation it involves solving a Partial Differential Equation (PDE), as is the case in a wide range of engineering applications.

Probabilistic Programming Computation

Bayesian inference of species trees using diffusion models

1 code implementation16 Sep 2019 Marnus Stoltz, Boris Bauemer, Remco Bouckaert, Colin Fox, Gordon Hiscott, David Bryant

We describe a new and computationally efficient Bayesian methodology for inferring species trees and demographics from unlinked binary markers.

Bayesian Inference

Approximation and sampling of multivariate probability distributions in the tensor train decomposition

1 code implementation2 Oct 2018 Sergey Dolgov, Karim Anaya-Izquierdo, Colin Fox, Robert Scheichl

We find that the importance-weight corrected quasi-Monte Carlo quadrature performs best in all computed examples, and is orders-of-magnitude more efficient than DRAM across a wide range of approximation accuracies and sample sizes.

Numerical Analysis Probability Statistics Theory Statistics Theory 65D15, 65D32, 65C05, 65C40, 65C60, 62F15, 15A69, 15A23

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