

volcano {base}                               R Documentation

_T_o_p_o_g_r_a_p_h_i_c _I_n_f_o_r_m_a_t_i_o_n _f_o_r _t_h_e _M_a_u_n_g_a _W_h_a_u _V_o_l_c_a_n_o

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

     Maunga Whau (Mt Eden) is one of about 50 volcanos in
     the Auckland volcanic field.  This data set gives topo-
     graphic information for Maunga Whau on a 10m by 10m
     grid.

     The data are in the form of a matrix with rows corre-
     sponding to grid lines running east to west and columns
     to grid lines running south to north.

_U_s_a_g_e_:

     data(volcano)

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

     A matrix with 87 rows and 61 columns.

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

     Digitized from a topographic map by Ross Ihaka.  These
     data should not be regarded as accurate.

_R_e_f_e_r_e_n_c_e_s_:

_S_e_e _A_l_s_o_:

     `filled.contour' for a nice plot.

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

     data(volcano)
     filled.contour(volcano, color = terrain.colors, asp = 1)
     title(main = "volcano data: filled contour map")

