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 their subsequent  birth weight.

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

     secher

_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), European Journal of Obstetrics, Gynecology,
     and Reproductive Biology, 24: 1-11.

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

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

