Unused-classes package:Matrix R Documentation _V_i_r_t_u_a_l _C_l_a_s_s_e_s _N_o_t _Y_e_t _R_e_a_l_l_y _I_m_p_l_e_m_e_n_t_e_d _a_n_d _U_s_e_d _D_e_s_c_r_i_p_t_i_o_n: 'iMatrix' is the virtual class of all *i*nteger (S4) matrices. It extends the 'Matrix' class directly. 'zMatrix' is the virtual class of all 'complex' (S4) matrices. It extends the 'Matrix' class directly. _E_x_a_m_p_l_e_s: showClass("iMatrix") showClass("zMatrix")