ppregion package:spatial R Documentation _S_e_t _D_o_m_a_i_n _f_o_r _S_p_a_t_i_a_l _P_o_i_n_t _P_a_t_t_e_r_n _A_n_a_l_y_s_e_s _D_e_s_c_r_i_p_t_i_o_n: Sets the rectangular domain '(xl, xu)' x '(yl, yu)'. _U_s_a_g_e: ppregion(xl = 0, xu = 1, yl = 0, yu = 1) _A_r_g_u_m_e_n_t_s: xl: Either 'xl' or a list containing components 'xl', 'xu', 'yl', 'yu' (such as a point-process object) xu: yl: yu: _V_a_l_u_e: none _S_i_d_e _E_f_f_e_c_t_s: initializes variables in the 'C' subroutines. _R_e_f_e_r_e_n_c_e_s: Venables, W. N. and Ripley, B. D. (2002) _Modern Applied Statistics with S._ Fourth edition. Springer. _S_e_e _A_l_s_o: 'ppinit', 'ppgetregion'