mammalsleep             package:faraway             R Documentation

_S_l_e_e_p  _i_n _M_a_m_m_a_l_s: _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 _C_o_r_r_e_l_a_t_e_s

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

     The 'mammalsleep' data frame has 62 rows and 10 columns. Sleep  in
     Mammals: Ecological and Constitutional Correlates

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

     data(mammalsleep)

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

     This data frame contains the following columns:

     '_b_o_d_y' body weight in kg

     '_b_r_a_i_n' brain weight in g

     '_n_o_n_d_r_e_a_m' slow wave ("nondreaming") sleep (hrs/day)

     '_d_r_e_a_m' paradoxical ("dreaming") sleep (hrs/day)

     '_s_l_e_e_p' total sleep (hrs/day)  (sum of slow wave and paradoxical
          sleep)

     '_l_i_f_e_s_p_a_n' maximum life span (years)

     '_g_e_s_t_a_t_i_o_n' gestation time (days)

     '_p_r_e_d_a_t_i_o_n' predation index (1-5) 1 = minimum (least likely to be
          preyed upon) to 5 = maximum (most likely to be preyed upon)

     '_e_x_p_o_s_u_r_e' sleep exposure index (1-5) 1 = least exposed (e.g.
          animal sleeps in a  well-protected den) 5 = most exposed

     '_d_a_n_g_e_r' overall danger index (1-5) (based on the above two
          indices and other information) 1 = least danger (from other
          animals) 5 = most danger (from other animals)

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

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

