aircraft             package:robustbase             R Documentation

_A_i_r_c_r_a_f_t _D_a_t_a

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

     Aircraft Data, deals with 23 single-engine aircraft built over the
     years 1947-1979, from Office of Naval Research. The dependent
     variable is cost  (in units of $100,000) and the explanatory
     variables are aspect ratio, lift-to-drag ratio, weight of plane
     (in pounds) and maximal thrust.

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

     data(aircraft)

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

     A data frame with 23 observations on the following 5 variables.

     '_X_1' Aspect Ratio

     '_X_2' Lift-to-Drag Ratio

     '_X_3' Weight

     '_X_4' Thrust

     '_Y' Cost

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

     P. J. Rousseeuw and A. M. Leroy (1987) _Robust Regression and
     Outlier Detection_; Wiley, page 154, table 22.

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

     data(aircraft)
     summary( lm.airc <-        lm(Y ~ ., data = aircraft))
     summary(rlm.airc <- MASS::rlm(Y ~ ., data = aircraft))

     aircraft.x <- data.matrix(aircraft[,1:4])
     c_air <- covMcd(aircraft.x)
     c_air

