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.

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

     vitcap

_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:

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

