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import rpy2
%load_ext rpy2.ipython


%load_ext rmagic  ########## This works

%R a=c(1:5)
%R a
%R -i df_unique #passing df_unique from python to R

%%R to denote a full cell of R code


http://www.randalolson.com/2013/01/14/filling-in-pythons-gaps-in-statistics-packages-with-rmagic/