Version: 1.2 [2017-08-09] *New funtions made by Stefano Nembrini compute IPM with package gbm. Version: 1.1.1 [2017-07-26] *Corrections in the functions that compute IPM for taking into account the possibility of no grown trees. *Submitted to CRAN. Version: 1.1 [2017-07-15] *New funtions made by Stefano Nembrini compute IPM with package ranger. *Small change (the funtion does the same as the previous version) in function prevtree for reading regression trees from randomForest. *Submitted to CRAN. Version: 1.0 [2017-05-02] * First package version. * Submitted to CRAN.