Search Results for author: Luca Scrucca

Found 5 papers, 0 papers with code

Handling missing data in model-based clustering

no code implementations4 Jun 2020 Alessio Serafini, Thomas Brendan Murphy, Luca Scrucca

Gaussian Mixture models (GMMs) are a powerful tool for clustering, classification and density estimation when clustering structures are embedded in the data.

Clustering Data Augmentation +3

A fast and efficient Modal EM algorithm for Gaussian mixtures

no code implementations10 Feb 2020 Luca Scrucca

In the modal approach to clustering, clusters are defined as the local maxima of the underlying probability density function, where the latter can be estimated either non-parametrically or using finite mixture models.

Clustering

Projection pursuit based on Gaussian mixtures and evolutionary algorithms

no code implementations27 Dec 2019 Luca Scrucca, Alessio Serafini

We show that this semi-parametric approach to PP is flexible and allows highly informative structures to be detected, by projecting multivariate datasets onto a subspace, where the data can be feasibly visualised.

Density Estimation Evolutionary Algorithms

Model-based SIR for dimension reduction

no code implementations10 Aug 2015 Luca Scrucca

A new dimension reduction method based on Gaussian finite mixtures is proposed as an extension to sliced inverse regression (SIR).

Dimensionality Reduction General Classification +1

Dimension reduction for model-based clustering

no code implementations7 Aug 2015 Luca Scrucca

Information on the dimension reduction subspace is obtained from the variation on group means and, depending on the estimated mixture model, on the variation on group covariances.

Clustering Dimensionality Reduction

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