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