Editorial for issue 3 2015

This third issue volume 9 (2015) of the journal Advances in Data Analysis and Classification (ADAC) includes articles which deal with: a biplot procedure after clustering objects and variables; an extension of classical principal component analysis to the case of non-linear reconstruction formulas (auto-associative models); a nonparametric fast and very robust new classifier, named DDα -classifier; and a clustering methodology for financial time series; finally a diffusion model for churn prediction based on sociometric theory.