Developers Ross Ihaka Author Paul Murrell Author Kurt Hornik Author Jason C. Fisher Author Reto Stauffer Author Claus O. Wilke Author Claire D. McWhite Author Achim Zeileis Author, maintainer Developed by Ross Ihaka, Paul Murrell, Kurt Hornik, Jason C. Fisher, Reto Stauffer, Claus O. Wilke, Claire D. McWhite, Achim Zeileis.