Internal package:base R Documentation _C_a_l_l _a_n _I_n_t_e_r_n_a_l _F_u_n_c_t_i_o_n _D_e_s_c_r_i_p_t_i_o_n: '.Internal' performs a call to an internal code which is built in to the R interpreter. Only true R wizards should even consider using this function, and only R developers can add to the list of internal functions. _U_s_a_g_e: .Internal(call) _A_r_g_u_m_e_n_t_s: call: a call expression _S_e_e _A_l_s_o: '.Primitive', '.External' (the nearest equivalent available to users).