Logical. If TRUE, issue a warning message if any
duplicated points were found.
Value
Another point pattern object.
Details
These are methods for the generic function unique for
point pattern datasets (of class "ppp", see
ppp.object, or class "ppx").
Two points in a point pattern are deemed to be identical
if their $x,y$ coordinates are the same,
and their marks are also the same (if they carry marks).
The Examples section illustrates how it is possible for
a point pattern to contain a pair of identical points.
This function removes duplicate points in x,
and returns a point pattern.