sleep                  package:psy                  R Documentation

_E_c_o_l_o_g_i_c_a_l _a_n_d _C_o_n_s_t_i_t_u_t_i_o_n_a_l _D_a_t_a _i_n _M_a_m_m_a_l_s

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

     Data from which conclusions were drawn in the article  Mammals:
     Ecological and Constitutional Correlates, by Allison, T. and
     Cicchetti, D. (1976) Science, November 12, vol. 194, pp.732-734

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

     data(sleep)

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

     This data frame contains the following columns:

     _S_p_e_c_i_e_s a factor with levels

     _B_o_d_y._w_e_i_g_h_t a numeric vector, body weight in kg

     _B_r_a_i_n._w_e_i_g_h_t a numeric vector, Brain weight in g

     _S_l_o_w._w_a_v_e._s_l_e_e_p a numeric vector, nondreaming sleep (hrs/day)

     _P_a_r_a_d_o_x_i_c_a_l._s_l_e_e_p a numeric vector, dreaming sleep (hrs/day)

     _T_o_t_a_l._s_l_e_e_p a numeric vector, nondreaming + dreaming (hrs/day)

     _M_a_x_i_m_u_m._l_i_f_e._s_p_a_n a numeric vector (in years)

     _G_e_s_t_a_t_i_o_n._t_i_m_e a numeric vector (in days)

     _P_r_e_d_a_t_i_o_n a numeric vector, Predation index (1 min - 5 max)

     _S_l_e_e_p._e_x_p_o_s_u_r_e a numeric vector, Sleep exposure index (1 min - 5
          max)

     _D_a_n_g_e_r a numeric vector, Overall danger index (1 min - 5 max)

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

     http://lib.stat.cmu.edu/datasets/sleep

_R_e_f_e_r_e_n_c_e_s:

     Mammals: Ecological and Constitutional Correlates, by Allison, T.
     and Cicchetti, D. (1976) Science, November 12, vol. 194,
     pp.732-734

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

     data(sleep)
     str(sleep)

