“…There already exists a toolbox moQuantile [2] for Octave and MATLAB that implements the algorithms of [17] and [18] in a professional way and makes the directional multiple-output quantile regression accessible to ordinary users. The R package modQR [1] presented here (and already available from CRAN) is its faithful R translation by its authors that primarily aims at those many statisticians using R as their only computing environment.…”