Keywords :
Circular–linear data; Circular–linear regression; Distributions on the cylinder; Sine-skewed von Mises distribution; Weibull distribution; Statistics and Probability; Economics and Econometrics; Statistics, Probability and Uncertainty
Abstract :
[en] 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 WeiSSVM, enjoys numerous advantages: simple normalizing constant and hence very tractable density, parameter-parsimony and interpretability, good circular–linear dependence structure, easy random number generation thanks to known marginal/conditional distributions, and flexibility illustrated via excellent fitting abilities. Inferential issues, such as independence testing, circular–linear respectively linear–circular regression, can easily be tackled with the new model, which is applied on two real data sets.
Funding text :
Toshihiro Abe was supported in part by JSPS KAKENHI Grant number 15K17593 and Nanzan University of Pache Research Subsidy I-A-2 for the 2015 academic year. Christophe Ley was supported in part by the Fonds National de la Recherche Scientifique, Communauté française de Belgique, via a Mandat de Chargé de Recherche. Both authors would like to thank three anonymous referees for helpful comments that led to an improvement of the present paper.
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