perarea              package:adehabitat              R Documentation

_C_o_m_p_u_t_e _A_r_e_a_s _a_n_d _P_e_r_i_m_e_t_e_r_s _o_f _O_b_j_e_c_t_s _o_f _C_l_a_s_s "_a_r_e_a"

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

     'perarea' computes the perimeters of polygons in objects of class
     'area'.
      'ararea' computes the areas of polygons in objects of class
     'area'.

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

     perarea(x)
     ararea(x)

_A_r_g_u_m_e_n_t_s:

       x: object of class 'area' 

_V_a_l_u_e:

     a vector.

_W_a_r_n_i_n_g:

     'ararea' requires the package 'gpclib'.

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

     Clment Calenge calenge@biomserv.univ-lyon1.fr

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

     'as.area', 'plot.area'

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

     data(puechabon)
     locs <-  puechabon$locs

     cp <- mcp(locs[,4:5], locs[,1])

     perarea(cp)

     if (require(gpclib))
        ararea(cp)

