santacatalina              package:ade4              R Documentation

_I_n_d_i_r_e_c_t _O_r_d_i_n_a_t_i_o_n

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

     This data set gives the densities per hectare of 11 species of
     trees  for 10 transects of topographic moisture values (mean of
     several stations per class)

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

     data(santacatalina)

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

     Gauch, H. G. J., Chase, G. B. and Whittaker R. H. (1974)
     Ordination of vegetation samples by Gaussian species
     distributions. _Ecology_, *55*, 1382-1390.

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

     data(santacatalina)
     par(mfrow = c(2,2))
     table.value(log(santacatalina + 1), grid = TRUE)
     table.value(log(santacatalina + 1)[,sample(10)], grid = TRUE)
     coa1 <- dudi.coa(log(santacatalina + 1), scan = FALSE) # 2 factors
     table.value(log(santacatalina + 1)[order(coa1$li[,1]), 
         order(coa1$co[,1])], grid = TRUE) 
     scatter(coa1, posi = "bottom")

