Search Results for author: Thomas Lartigue

Found 5 papers, 2 papers with code

Scalable Regularised Joint Mixture Models

1 code implementation3 May 2022 Thomas Lartigue, Sach Mukherjee

Building on developments at the intersection of unsupervised learning and regularised regression, we propose an approach for heterogeneous data that allows joint learning of (i) explicit multivariate feature distributions, (ii) high-dimensional regression models and (iii) latent group labels, with both (i) and (ii) specific to latent groups and both elements informing (iii).

Computational Efficiency regression

On unsupervised projections and second order signals

no code implementations11 Apr 2022 Thomas Lartigue, Sach Mukherjee

Motivated by such applications, in this paper we ask whether linear projections can preserve differences in second order structure between latent groups.

Mixture of Conditional Gaussian Graphical Models for unlabelled heterogeneous populations in the presence of co-factors

1 code implementation19 Jun 2020 Thomas Lartigue, Stanley Durrleman, Stéphanie Allassonnière

We demonstrate on synthetic and real data how this method fulfils its goal and succeeds in identifying the sub-populations where the Mixtures of GGM are disrupted by the effect of the co-features.

Deterministic Approximate EM Algorithm; Application to the Riemann Approximation EM and the Tempered EM

no code implementations23 Mar 2020 Thomas Lartigue, Stanley Durrleman, Stéphanie Allassonnière

In this paper, we introduce a theoretical framework, with state-of-the-art convergence guarantees, for any deterministic approximation of the E step.

Gaussian Graphical Model exploration and selection in high dimension low sample size setting

no code implementations11 Mar 2020 Thomas Lartigue, Simona Bottani, Stephanie Baron, Olivier Colliot, Stanley Durrleman, Stéphanie Allassonnière

We demonstrate on synthetic data that, when the sample size is small, the two methods produce graphs with either too few or too many edges when compared to the real one.

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