secher                 package:ISwR                 R Documentation

_B_i_r_t_h _w_e_i_g_h_t _a_n_d _u_l_t_r_a_s_o_n_o_g_r_a_p_h_y

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

     The 'secher' data frame has 107 rows and 4 columns. It contains
     ultrasonographic measurements of fetuses immediately before birth
     and subsequent  birth weight.

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

     This data frame contains the following columns:

     _b_w_t a numeric vector. Birth weight (g).

     _b_p_d a numeric vector. Biparietal diameter (mm).

     _a_d a numeric vector. Abdominal diameter (mm).

     _n_o a numeric vector. Observation number.

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

     D. Kronborg and L.T. Skovgaard (1990), _Regressionsanalyse_,
     Table~3.1, FADLs Forlag (in Danish).

     Secher et al. (1987), Eur.j.obs.gyn.repr.biol., 24, 1-11.

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

     data(secher)
     plot(bwt~ad, data=secher, log="xy")

