| superimpose {spatstat} | R Documentation |
Superimpose any number of point patterns.
superimpose(..., W)
... |
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.
|
W |
Optional. Window for the resulting point pattern.
An object of class "owin", or something
acceptable to as.owin.
|
This function is used to superimpose two or more point patterns
(see also concatxy).
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. The point patterns are not required to have
the same window of observation.
The window for the superimposed point pattern is
specified by W. Its default value is
the union of the windows of all the point patterns.
If any of the arguments is a marked point pattern, then all of them must be. In that case, the result is also a marked point pattern.
If the arguments are given in the form name=value,
then the names will be used
as marks attached to the corresponding points. See the last line
in the Examples.
A point pattern (object of class "ppp") representing the
superposition (union) of all the point patterns.
Adrian Baddeley adrian@maths.uwa.edu.au http://www.maths.uwa.edu.au/~adrian/ and Rolf Turner rolf@math.unb.ca http://www.math.unb.ca/~rolf
dat <- runifrect(30)
xy <- list(x=runif(10),y=runif(10))
new <- superimpose(dat, xy)
## Not run: plot(new)
# how to make a 2-type point pattern with types "a" and "b"
u <- superimpose(a = rpoispp(10), b = rpoispp(20))
# how to make a 2-type point pattern with types 1 and 2
u <- superimpose("1" = rpoispp(10), "2" = rpoispp(20))