Changes in version 1.7 (2017-01-26)                   

    o   add feature selection for regression

                  Changes in version 1.5 (2013-09-30)                   

    o   add feaIni, so that one can pre-define features in the initial feature subset F

    o   add feaSet - the final feature set F selected by RRF

                       Changes in version 1.3-1.4                       

    o   Guided Random Forest

                  Changes in version 1.2 (2012-04-09)                   

    o   test up to sqrt(P) variables in addition to the selected variables

                  Changes in version 1.0 (2011-11-18)                   

    o   this is the first version of the RRF package.