distmap
From spatstat v1.6-5
by Adrian Baddeley
Distance Map
Compute the distance map of an object. Generic.
- Keywords
- spatial
Usage
distmap(X, ...)
Arguments
- X
- Any suitable dataset representing a two-dimensional
object, such as a point pattern (object of class
"ppp"
), or a window (object of class"owin"
). - ...
- Arguments passed to
as.mask
to control pixel resolution.
Details
The ``distance map'' of a set of points $A$ is the function
$f$ whose value f(x)
is defined for any two-dimensional
location $x$ as the shortest distance from $x$ to $A$.
This function computes the distance map of the set X
and returns the distance map as a pixel image.
This is generic. Methods are provided for
point patterns (distmap.ppp
)
and windows (distmap.owin
).
Value
- A pixel image (object of class
"im"
) whose grey scale values are the values of the distance map.
See Also
Examples
data(cells)
U <- distmap(cells)
data(letterR)
V <- distmap(letterR)
plot(U)
plot(V)
Community examples
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