Recent advances in directional statistics
Mainstream statistical methodology is generally applicable to data observed in Euclidean
space. There are, however, numerous contexts of considerable scientific interest in which …
space. There are, however, numerous contexts of considerable scientific interest in which …
Flexible models for complex data with applications
Probability distributions are the building blocks of statistical modeling and inference. It is
therefore of the utmost importance to know which distribution to use in what circumstances …
therefore of the utmost importance to know which distribution to use in what circumstances …
Initialization of hidden Markov and semi‐Markov models: A critical evaluation of several strategies
The expectation–maximization (EM) algorithm is a familiar tool for computing the maximum
likelihood estimate of the parameters in hidden Markov and semi‐Markov models. This …
likelihood estimate of the parameters in hidden Markov and semi‐Markov models. This …
A tractable, parsimonious and flexible model for cylindrical data, with applications
New cylindrical distributions are proposed by combining the sine-skewed von Mises
distribution (circular part) with the Weibull distribution (linear part). This new model, the …
distribution (circular part) with the Weibull distribution (linear part). This new model, the …
Segmentation of sea current fields by cylindrical hidden Markov models: a composite likelihood approach
Motivated by segmentation issues in studies of sea current circulation, we describe a hidden
Markov random field for the analysis of spatial cylindrical data, ie bivariate spatial series of …
Markov random field for the analysis of spatial cylindrical data, ie bivariate spatial series of …
The trivariate wrapped Cauchy copula--a multi-purpose model for angular data
In this paper, we will present a new flexible distribution for three-dimensional angular data,
or data on the three-dimensional torus. Our trivariate wrapped Cauchy copula has the …
or data on the three-dimensional torus. Our trivariate wrapped Cauchy copula has the …
Dynamic mixtures of factor analyzers to characterize multivariate air pollutant exposures
The assessment of pollution exposure is based on the analysis of a multivariate time series
that include the concentrations of several pollutants as well as the measurements of multiple …
that include the concentrations of several pollutants as well as the measurements of multiple …
Regime switching models for circular and linear time series
A Harvey, D Palumbo - Journal of Time Series Analysis, 2023 - Wiley Online Library
The score‐driven approach to time series modelling is able to handle circular data and
switching regimes with intra‐regime dynamics. Furthermore it enables a dynamic model to …
switching regimes with intra‐regime dynamics. Furthermore it enables a dynamic model to …
Copula-based segmentation of cylindrical time series
F Lagona - Statistics & Probability Letters, 2019 - Elsevier
A hidden Markov model is proposed for segmenting cylindrical time series according to a
finite number of latent classes, associated with copula-based cylindrical densities. It …
finite number of latent classes, associated with copula-based cylindrical densities. It …
Model-based segmentation of spatial cylindrical data
ABSTRACT A new hidden Markov random field model is proposed for the analysis of
cylindrical spatial series, ie bivariate spatial series of intensities and angles. It allows us to …
cylindrical spatial series, ie bivariate spatial series of intensities and angles. It allows us to …