InternalMethods             package:base             R Documentation

_I_n_t_e_r_n_a_l _G_e_n_e_r_i_c _F_u_n_c_t_i_o_n_s

_D_e_s_c_r_i_p_t_i_o_n:

     Many R-internal functions are _generic_ and allow methods to be
     written for.

_D_e_t_a_i_l_s:

     The following builtin functions are _generic_ as well, i.e., you
     can write 'methods' for them:

     '[',             '[[',            '$', '[<-', '[[<-', '$<-',

     'length', 'length<-',

     'dimnames<-',    'dimnames',      'dim<-',         'dim'           

     'c',             'unlist',       

     'as.character', 'as.vector',     'is.array', 'is.atomic',
     'is.call', 'is.character', 'is.complex', 'is.double',
     'is.environment', 'is.function', 'is.integer', 'is.language',
     'is.logical', 'is.list', 'is.matrix', 'is.na',         'is.nan'   
          'is.null', 'is.numeric', 'is.object', 'is.pairlist',
     'is.recursive', 'is.single', 'is.symbol'.

_S_e_e _A_l_s_o:

     'methods' for the methods of non-Internal generic functions.

