wo                   package:geoR                   R Documentation

_K_r_i_g_i_n_g _e_x_a_m_p_l_e _d_a_t_a _f_r_o_m _W_e_b_s_t_e_r _a_n_d _O_l_i_v_e_r

_D_e_s_c_r_i_p_t_i_o_n:

     Data used in Chapter 8, page 156 of Webster and Oliver (2001) to
     illustrate properties of the kriging predictor.

_U_s_a_g_e:

     data(wo)

_F_o_r_m_a_t:

     An object of the class 'geodata' which is a list with the
     elements:

     _c_o_o_r_d_s coordinates of the data location. 

     _d_a_t_a the data vector. 

     _x_1 coordinate of the centrally located prediction point. 

     _x_2 coordinate of the off-centre prediction point. 

_S_o_u_r_c_e:

     Webster, R. and Oliver, M.A. (2001). Geostatistics for
     Environmental Scientists. Wiley.

_E_x_a_m_p_l_e_s:

     attach(wo)
     par(mfrow=c(1,2))
     plot(c(-10,130), c(-10,130), ty="n", asp=1)
     points(rbind(coords, x1))
     text(coords[,1], 5+coords[,2], format(data))
     text(x1[1]+5, x1[2]+5, "?", col=2)
     plot(c(-10,130), c(-10,130), ty="n", asp=1)
     points(rbind(coords, x2))
     text(coords[,1], 5+coords[,2], format(data))
     text(x2[1]+5, x2[2]+5, "?", col=2)

