treepipit              package:maxstat              R Documentation

_T_r_e_e _P_i_p_i_t _D_a_t_a

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

     Counts of tree pipits at 86 raster points in oak forests.

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

     data(treepipit)

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

     A data frame with 86 observations on the following 2 variables.

     _c_o_u_n_t_s number of tree pipits counted.

     _c_o_v_e_r_s_t_o_r_e_y canopy overstorey in percent.

_D_e_t_a_i_l_s:

     The influence of canopy overstorey on the number of bird 
     individuals is of special interest.

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

     Data collected and kindly provided by Joerg Mueller
     <mue@lwf.uni-muenchen.de>.

_R_e_f_e_r_e_n_c_e_s:

     Mueller J. and Hothorn T. (2003), On the Identification and
     Assessment of  Habitat Patterns with Impact in Breeding Bird
     Communities in Oak Forests. _submitted manuscript_.

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

     data(treepipit)
     mod <- maxstat.test(counts ~ coverstorey, data = treepipit, 
                         smethod = "Data", pmethod = "HL", minprop = 0.2,
                         maxprop = 0.8)
     print(mod)
     plot(mod)

