meaudret                package:ade4                R Documentation

_E_c_o_l_o_g_i_c_a_l _D_a_t_a : _s_i_t_e_s-_v_a_r_i_a_b_l_e_s, _s_i_t_e_s-_s_p_e_c_i_e_s, _w_h_e_r_e _a_n_d _w_h_e_n

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

     This data set contains informations about sites, environmental
     variables and species (Trichopters).

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

     data(meaudret)

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

     'meaudret' is a list of 3 components.

     _m_i_l is a data frame with 20 sites and 9 variables.

     _f_a_u is a data frame with 20 sites and 13 species (Trichopters).

     _p_l_a_n is a data frame with 20 sites and 2 factors.

        _d_a_t is a factor with 4 levels.

        _s_t_a is a factor with 5 levels.


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

     Pegaz-Maucet, D. (1980)  _Impact d'une perturbation d'origine
     organique sur la drive des macro-invertbrs benthiques d'un
     cours d'eau. Comparaison avec le benthos._ Thse de troisime
     cycle, Universit Lyon 1, 130 p.

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

     data(meaudret)
     par(mfrow = c(2,2))
     pca1 <- dudi.pca(meaudret$mil, scan = FALSE, nf = 4)
     s.class(pca1$li, meaudret$plan$dat, 
         sub = "Principal Component Analysis")
     pca2 <- between(pca1, meaudret$plan$dat, scan = FALSE, nf = 2)
     s.class(pca2$ls, meaudret$plan$dat, sub = "Between dates Principal Component Analysis")
     s.corcircle(pca1$co)
     s.corcircle(pca2$as)

