duplicated.ppp
From spatstat v1.16-2
by Adrian Baddeley
Determine Duplicated Points in a Spatial Point Pattern
Determines which points in a spatial point pattern are duplicates of previous points, and returns a logical vector.
Usage
## S3 method for class 'ppp':
duplicated(x, \dots)
Arguments
- x
- A spatial point pattern
(object of class
"ppp"
). - ...
- Ignored.
Details
This is a method for the generic function duplicated
for
point pattern datasets (of class "ppp"
, see ppp.object
).
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 determines which points in x
duplicate
other points that appeared earlier in the sequence. It
returns a logical vector with entries that are TRUE
for duplicated points and FALSE
for unique (non-duplicated)
points.
Value
- A logical vector of length equal to the number of points in
x
.
See Also
Examples
X <- ppp(c(1,1,0.5), c(2,2,1), window=square(3))
duplicated(X)
Community examples
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