A few days ago, Yixuan Qiu gave us all a nice (early) present for the holidays and updated RcppEigen in a pitch-perfect pull request to 0.3.2.3.0. A little more here: http://dirk.eddelbuettel.com/blog/2014/12/23#rcppeigen_0.3.2.3.0 Happy Holidays, Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org