inpip                package:splancs                R Documentation

_S_e_l_e_c_t _p_o_i_n_t_s _i_n_s_i_d_e _a _p_o_l_y_g_o_n

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

     Select points inside a polygon

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

     inpip(pts,poly,bound=NULL,quiet=TRUE)

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

     pts: A points data set 

    poly: A polygon data set 

   bound: If points fall exactly on polygon boundaries, the default
          NULL gives arbitrary assignments. If TRUE, then all points
          "on" boundaries are set as within the polygon, if FALSE,
          outside.

   quiet: Do not report which points are on boundary for non-NULL bound

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

     `inpip' returns a vector of indices of the points in `pts' that
     are located in the polygon. Note that "in" is an arbitrary concept
     for points "on" the polygon boundary.

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

     Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern
     analysis code in S-Plus.  Computers and Geosciences, 19, 627-655;
     the original sources can be accessed at: <URL:
     http://www.maths.lancs.ac.uk/~rowlings/Splancs/>. See also Bivand,
     R. and Gebhardt, A. 2000 Implementing functions for spatial
     statistical analysis using the R language. Journal of Geographical
     Systems, 2, 307-317.

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

     `pip'

