tortues                 package:ade4                 R Documentation

_M_o_r_p_h_o_l_o_g_i_c_a_l _S_t_u_d_y _o_f _t_h_e _P_a_i_n_t_e_d _T_u_r_t_l_e

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

     This data set gives a morphological description (4 characters) of
     48 turtles.

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

     data(tortues)

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

     a data frame with 48 rows and 4 columns (length (mm), maximum
     width(mm), height (mm), gender).

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

     Jolicoeur, P. and Mosimann, J. E. (1960) Size and shape variation
     in the painted turtle. A principal component analysis. _Growth_,
     *24*, 339-354.

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

     data(tortues)
     xyz <- as.matrix(tortues[,1:3])
     ref <- -svd(xyz)$u[,1]
     pch0 <- c(1,20)[as.numeric(tortues$sex)]
     plot(ref, xyz[,1], ylim = c(40,180), pch = pch0)
     abline(lm(xyz[,1]~ -1 + ref))
     points(ref,xyz[,2], pch = pch0)
     abline(lm(xyz[,2]~ -1 + ref))
     points(ref,xyz[,3], pch = pch0)
     abline(lm(xyz[,3]~ -1 + ref))

