3 papers
stat.ME2026
Modelling compositional data with structural zero values
Omar Alzeley, Michail Tsagris
Compositional data are positive multivariate data whose sum equals 1. A popular method to analyze such data is via log--ratio transformations, which are however not applicable when…
math.ST2026
On the generalized circular projected Cauchy distribution
Omar Alzeley, Michail Tsagris
\cite{tsagris2025a} proposed the generalized circular projected Cauchy (GCPC) distribution, whose special case is the wrapped Cauchy distribution. In this paper we first derive the…
stat.ME2025
Scalable approximation of the transformation-free linear simplicial-simplicial regression via constrained iterative reweighted least squares
Michail Tsagris, Omar Alzeley
Simplicia-simplicial regression concerns statistical modeling scenarios in which both the predictors and the responses are vectors constrained to lie on the simplex. \cite{fiksel20…