Extract Unique Points from a Spatial Point Pattern
Removes any points that are identical to other points in a spatial point pattern.
## S3 method for class 'ppp' unique(x, ..., warn=FALSE) ## S3 method for class 'ppx' unique(x, ..., warn=FALSE)
x |
A spatial point pattern
(object of class |
... |
Arguments passed to |
warn |
Logical. If |
These are methods for the generic function unique for
point pattern datasets (of class "ppp", see
ppp.object, or class "ppx").
This function removes duplicate points in x,
and returns a point pattern.
Two points in a point pattern are deemed to be identical
if their x,y coordinates are the same,
and their marks are the same (if they carry marks).
This is the default rule: see duplicated.ppp
for other options.
Another point pattern object.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner r.turner@auckland.ac.nz
X <- ppp(c(1,1,0.5), c(2,2,1), window=square(3)) unique(X) unique(X, rule="deldir")
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.