Ricerc@Sapienza

The PLMIX package offers a comprehensive framework aimed at endowing the R sta- tistical environment with some recent methodological advances in modeling and clustering partially ranked data. The usefulness of the PLMIX package can be moti- vated from several perspectives: (i) it contributes to fill the gap concerning Bayesian estimation of ranking models in R, by focusing on the Plackett-Luce model and its extension within the finite mixture approach as the generative sampling distribution; (ii) it addresses computational complexity by combining the flexibility of R routines and the speed of compiled C++ code, with possibly parallel execution; (iii) it covers the fundamental phases of ranking data analysis allowing for a more careful and critical application of ranking models in real contexts; (iv) it provides effective tools for clustering heterogeneous partially ranked data. Specific S3 classes and methods are also supplied to enhance the usability and foster exchange with other packages. The functionality of the novel package is illustrated with several applications to simulated and real datasets.