Open Access
2018 Bayesian classification of multiclass functional data
Xiuqi Li, Subhashis Ghosal
Electron. J. Statist. 12(2): 4669-4696 (2018). DOI: 10.1214/18-EJS1522


We propose a Bayesian approach to estimating parameters in multiclass functional models. Unordered multinomial probit, ordered multinomial probit and multinomial logistic models are considered. We use finite random series priors based on a suitable basis such as B-splines in these three multinomial models, and classify the functional data using the Bayes rule. We average over models based on the marginal likelihood estimated from Markov Chain Monte Carlo (MCMC) output. Posterior contraction rates for the three multinomial models are computed. We also consider Bayesian linear and quadratic discriminant analyses on the multivariate data obtained by applying a functional principal component technique on the original functional data. A simulation study is conducted to compare these methods on different types of data. We also apply these methods to a phoneme dataset.


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Xiuqi Li. Subhashis Ghosal. "Bayesian classification of multiclass functional data." Electron. J. Statist. 12 (2) 4669 - 4696, 2018.


Received: 1 August 2018; Published: 2018
First available in Project Euclid: 22 December 2018

zbMATH: 07003254
MathSciNet: MR3894067
Digital Object Identifier: 10.1214/18-EJS1522

Keywords: B-splines , discriminant analysis , Multiclass functional data , multinomial probit models , Posterior contraction rate

Vol.12 • No. 2 • 2018
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