aircraft                package:rrcov                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

     For convenience, the data sets 'aircraft.x', a matrix with  the
     four (independent) variables of the data frame, and 'aircraft.y', 
     the numeric vector giving the fifth (dependent) variable, are
     provided as well.

_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)
     covMcd(aircraft.x)

     summary(lm.aircraft <- lm(aircraft.y ~ aircraft.x))

