popn                  package:secr                  R Documentation

_P_o_p_u_l_a_t_i_o_n _O_b_j_e_c_t

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

     Encapsulate the locations of a set of individual animals.

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

     An object of class 'popn' records the locations of a set of
     individuals, together with ancillary data such as their sex. 
     Often used for a realisation of a spatial point process (e.g.
     homogeneous Poisson) with known density (intensity).  Locations
     are stored in a data frame with columns 'x' and 'y'.

     A 'popn' object has attributes

       covariates   data frame with numeric, factor or character variables to be used as individual covariates
       model2D      2-D distribution ('poisson', 'cluster', 'IHP')
       Ndist        distribution of number of individuals ('poisson', 'fixed')
       boundingbox  data frame of 4 rows, the vertices of the rectangular area

     The number of rows in 'covariates' must match the length of 'x'
     and 'y'. See 'sim.popn' for more information on 'Ndist' and
     'model2D'.

_N_o_t_e:

     The 'popn' class is used only occasionally: it is not central to
     spatially explicit capture recapture.

_A_u_t_h_o_r(_s):

     Murray Efford murray.efford@otago.ac.nz

_S_e_e _A_l_s_o:

     'sim.popn', 'plot.popn'

