ironslag                package:DAAG                R Documentation

_I_r_o_n _C_o_n_t_e_n_t _M_e_a_s_u_r_e_m_e_n_t_s

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

     The 'ironslag' data frame has 53 rows and 2 columns. Two methods
     for measuring the iron content in samples of slag  were compared,
     a chemical and a magnetic method.  The chemical method requires
     greater effort than the magnetic method.

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

     ironslag

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

     This data frame contains the following columns:

     _c_h_e_m_i_c_a_l a numeric vector containing the measurements coming from
          the chemical method

     _m_a_g_n_e_t_i_c a numeric vector containing the measurments coming from
          the magnetic method

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

     Hand, D.J., Daly, F., McConway, K., Lunn, D., and Ostrowski, E.
     eds (1993) A Handbook of Small Data Sets. London: Chapman & Hall.

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

     iron.lm <- lm(chemical ~ magnetic, data = ironslag)
     oldpar <- par(mfrow = c(2,2))
     plot(iron.lm)
     par(oldpar)

