phosphor                package:rrcov                R Documentation

_P_h_o_s_p_h_o_r_u_s _C_o_n_t_e_n_t _D_a_t_a

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

     This dataset investigates the effect from inorganic and organic
     Phosphorus  in the soil upon the phosphorus content of the corn
     grown in this soil,  from Prescott (1975).

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

     data(phosphor)

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

     A data frame with 18 observations on the following 3 variables.

     '_X_1' Inorganic Phosphorus 

     '_X_2' Organic Phosphorus 

     '_Y' Plant Phosphorus 

     For convenience, the data sets 'phosphor.x', a matrix with the
     first two (independent) variables of the data frame, and
     'phosphor.y', the numeric vector giving the thirth (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, p.156, table 24.

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

     data(phosphor)
     plot(phosphor.x)
     covMcd(phosphor.x)
     summary(lm.phosphor <- lm(phosphor.y ~ phosphor.x))

