vitcap                 package:ISwR                 R Documentation

_V_i_t_a_l _c_a_p_a_c_i_t_y

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

     The 'vitcap' data frame has 24 rows and 3 columns. It contains
     data on vital capacity for workers in the cadmium industry. It is
     a subset of the 'vitcap2' data set.

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

     This data frame contains the following columns:

     _g_r_o_u_p a numeric vector. Group codes are 1: Exposed > 10~years, 3:
          Not exposed.

     _a_g_e a numeric vector. Age in years.

     _v_i_t_a_l._c_a_p_a_c_i_t_y a numeric vector. Vital capacity (a measure of lung
          volume) in liters.

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

     P. Armitage and G. Berry (1987), _Statistical Methods in Medical
     Research_, 2nd ed., Blackwell, p.~286.

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

     data(vitcap)
     plot(vital.capacity~age, pch=group, data=vitcap)

