shuttle package:MASS R Documentation _S_p_a_c_e _S_h_u_t_t_l_e _A_u_t_o_l_a_n_d_e_r _P_r_o_b_l_e_m _D_e_s_c_r_i_p_t_i_o_n: The 'shuttle' data frame has 256 rows and 7 columns. The first six columns are categorical variables giving example conditions; the seventh is the decision. The first 253 rows are the training set, the last 3 the test conditions. _U_s_a_g_e: shuttle _F_o_r_m_a_t: This data frame contains the following factor columns: '_s_t_a_b_i_l_i_t_y' stable positioning or not ('stab' / 'xstab'). '_e_r_r_o_r' size of error ('MM' / 'SS' / 'LX' / 'XL'). '_s_i_g_n' sign of error, positive or negative ('pp' / 'nn'). '_w_i_n_d' wind sign ('head' / 'tail'). '_m_a_g_n' wind strength ('Light' / 'Medium' / 'Strong' / 'Out of Range'). '_v_i_s' visibility ('yes' / 'no'). '_u_s_e' use the autolander or not. ('auto' / 'noauto'.) _S_o_u_r_c_e: D. Michie (1989) Problems of computer-aided concept formation. In _Applications of Expert Systems 2_, ed. J. R. Quinlan, Turing Institute Press / Addison-Wesley, pp. 310-333. _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.