class96                 package:pad                 R Documentation

_P_A_D  -  _S_t_u_d_e_n_t_s _w_e_i_g_h_t _a_n_d _h_e_i_g_h_t _d_a_t_a

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

     The 'class96' data frame has 19 rows and 3 columns. The 'class97'
     data frame has 44 rows and 3 columns. The 'class98' data frame has
     52 rows and 3 columns.

     These data-sets records self-reported heights and weights of
     students who attended a GSSE401 class in the academic years
     1996-97, 1997-98 and 1998-99. The symbol 'NA' denotes missing
     values.

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

     data(class96)

     data(class97)

     data(class98)

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

     This data frame contains the following columns:

     _h_e_i_g_h_t a numeric vector with height of the students (m).  

     _w_e_i_g_h_t a numeric vector with weight of the students (kg).  

     _s_e_x a factor with two levels:

       'F' female student

       'M' male student

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

     data(class98)
     by(class98$weight, class98$sex, summary)
     ##
     data(class97)
     coplot(weight ~ height | sex, data=class97)

