superimpose             package:spatstat             R Documentation

_S_u_p_e_r_i_m_p_o_s_e _S_e_v_e_r_a_l _P_o_i_n_t _P_a_t_t_e_r_n_s

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

     Superimpose any number of point patterns.

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

       superimpose(...)

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

     ...: Any number of arguments, each of which represents a point
          pattern. Each argument must be either a point pattern object
          (of class `"ppp"') or a structure containing elements `x' and
          `y'. 

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

     This function is used to superimpose two or more point patterns
     (see also `concatxy'). 

     It assumes that each of the arguments in `...' is either a point
     pattern object (of class `"ppp"') or a structure containing (at
     least) the elements `x' and `y'. All the point patterns are
     assumed to have the same window of observation, and (if they are
     marked point patterns) the same space of possible marks.

     The first argument must be a point pattern object, and it
     determines the observation window and mark space for the result.

     To superimpose point patterns consisting only of `x,y'
     coordinates, use `concatxy'.

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

     A point pattern (object of class `"ppp"') representing the
     superposition (union) of all the point patterns.

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

     Adrian Baddeley adrian@maths.uwa.edu.au <URL:
     http://www.maths.uwa.edu.au/~adrian/> and Rolf Turner
     rolf@math.unb.ca <URL: http://www.math.unb.ca/~rolf>

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

     `concatxy', `quadscheme'

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


       library(spatstat)

       dat <- runifrect(30)
       xy <- list(x=runif(10),y=runif(10))
       new <- superimpose(dat, xy)
       plot(new)

