multiplicity.ppp
From spatstat v1.16-2
by Adrian Baddeley
Count Multiplicity of Duplicate Points
Counts the number of duplicates for each point in a spatial point pattern.
Usage
multiplicity.ppp(x)
Arguments
- x
- A spatial point pattern
(object of class
"ppp"
).
Details
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.
For each point in x
, this function counts how many
points are identical to it, and returns the vector of counts.
Value
- A vector of integers (multiplicities) 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))
m <- multiplicity.ppp(X)
# unique points in X, marked by multiplicity
first <- !duplicated(X)
Y <- X[first] %mark% m[first]
Community examples
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