where.max
From spatstat v1.480
by Adrian Baddeley
Find Location of Maximum in a Pixel Image
Finds the spatial location(s) where a given pixel image attains its maximum or minimum value.
Usage
where.max(x, first = TRUE) where.min(x, first = TRUE)
Arguments
 x

A pixel image (object of class
"im"
).  first

Logical value. If
TRUE
(the default), then only one location will be returned. IfFALSE
, then all locations where the maximum is achieved will be returned.
Details
This function finds the spatial location or locations where the
pixel image x
attains its maximum or minimum value.
The result is a point pattern giving the locations.
If first=TRUE
(the default), then only one location will
be returned, namely the location with the smallest $y$ coordinate
value which attains the maximum or minimum.
This behaviour is analogous to the functions
which.min
and
which.max
.
If first=FALSE
, then the function returns
the locations of all pixels where the
maximum (or minimum) value is attained. This could be a large
number of points.
Value

A point pattern (object of class
"ppp"
).
See Also
Examples
D < distmap(letterR, invert=TRUE)
plot(D)
plot(where.max(D), add=TRUE, pch=16, cols="green")
Community examples
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