Clustering and Model Selection via Penalized Likelihood for Different-sized Categorical Data Vectors - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year :

Clustering and Model Selection via Penalized Likelihood for Different-sized Categorical Data Vectors

(1) , (1, 2)
1
2

Abstract

In this study, we consider unsupervised clustering of categorical vectors that can be of different size using mixture. We use likelihood maximization to estimate the parameters of the underlying mixture model and a penalization technique to select the number of mixture components. Regardless of the true distribution that generated the data, we show that an explicit penalty, known up to a multiplicative constant, leads to a non-asymptotic oracle inequality with the Kullback-Leibler divergence on the two sides of the inequality. This theoretical result is illustrated by a document clustering application. To this aim a novel robust expectation-maximization algorithm is proposed to estimate the mixture parameters that best represent the different topics. Slope heuristics are used to calibrate the penalty and to select a number of clusters.
Fichier principal
Vignette du fichier
CategoricalVectorClustering.pdf (547.83 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01583692 , version 1 (07-09-2017)

Identifiers

Cite

Esther Derman, Erwan Le Pennec. Clustering and Model Selection via Penalized Likelihood for Different-sized Categorical Data Vectors. 2017. ⟨hal-01583692⟩
256 View
258 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More