PB12Des                 package:BsMD                 R Documentation

_1_2-_r_u_n _P_l_a_c_k_e_t_t-_B_u_r_m_a_n _D_e_s_i_g_n _M_a_t_r_i_x

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

     12-run Plackett-Burman design matrix.

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

     data(PB12Des)

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

     A data frame with 12 observations on the following 11 variables.

     _x_1 numeric vectors. Contrast factor.

     _x_2 numeric vectors. Contrast factor.

     _x_3 numeric vectors. Contrast factor.

     _x_4 numeric vectors. Contrast factor.

     _x_5 numeric vectors. Contrast factor.

     _x_6 numeric vectors. Contrast factor.

     _x_7 numeric vectors. Contrast factor.

     _x_8 numeric vectors. Contrast factor.

     _x_9 numeric vectors. Contrast factor.

     _x_1_0 numeric vectors. Contrast factor.

     _x_1_1 numeric vectors. Contrast factor.

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

     Box G. E. P, Hunter, W. C. and Hunter, J. S. (2004). _Statistics
     for Experimenters II_. Wiley.

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

     library(BsMD)
     data(PB12Des,package="BsMD")
     str(PB12Des)
     X <- as.matrix(PB12Des)
     print(t(X)%*%X)

