crabs                  package:MASS                  R Documentation

_M_o_r_p_h_o_l_o_g_i_c_a_l _M_e_a_s_u_r_e_m_e_n_t_s _o_n _L_e_p_t_o_g_r_a_p_s_u_s _C_r_a_b_s

_D_e_s_c_r_i_p_t_i_o_n:

     The 'crabs' data frame has 200 rows and 8 columns, describing 5
     morphological measurements on 50 crabs each of two colour forms
     and both sexes, of the species _Leptograpsus variegatus_ collected
     at Fremantle, W. Australia.

_U_s_a_g_e:

     crabs

_F_o_r_m_a_t:

     This data frame contains the following columns:

     '_s_p' 'species' - '"B"' or '"O"' for blue or orange.

     '_s_e_x' as it says.

     '_i_n_d_e_x' index '1:50' within each of the four groups.

     '_F_L' frontal lobe size (mm).

     '_R_W' rear width (mm).

     '_C_L' carapace length (mm).

     '_C_W' carapace width (mm).

     '_B_D' body depth (mm).


_S_o_u_r_c_e:

     Campbell, N.A. and Mahon, R.J. (1974) A multivariate study of
     variation in two species of rock crab of genus _Leptograpsus._
     _Australian Journal of  Zoology_ *22*, 417-425.

_R_e_f_e_r_e_n_c_e_s:

     Venables, W. N. and Ripley, B. D. (2002) _Modern Applied
     Statistics with S._ Fourth edition.  Springer.