abrasion               package:faraway               R Documentation

_W_e_a_r _o_n _m_a_t_e_r_i_a_l_s _a_c_c_o_r_d_i_n_g _t_o _t_y_p_e, _r_u_n _a_n_d _p_o_s_i_t_i_o_n

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

     The 'composite' data frame has 16 rows and 4 columns. Four
     materials were fed into a wear testing machine and the amount of
     wear recorded. Four samples could be processed at the same time
     and the position of these samples may be important. A Latin square
     design was used.

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

     data(abrasion)

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

     This data frame contains the following columns:


     '_r_u_n' The run number 1-4


     '_p_o_s_i_t_i_o_n' The position number 1-4


     '_m_a_t_e_r_i_a_l' The material A-D


     '_w_e_a_r' The wear measured loss of weight in 0.1mm over testing
          period

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

     The Design and Analysis of Industrial Experiments by O. Davies,
     1954, published by Wiley

