reflect
From spatstat v1.41-1
by Adrian Baddeley
Reflect In Origin
Reflects a geometrical object through the origin.
Usage
reflect(X) ## S3 method for class 'im':
reflect(X)
## S3 method for class 'default':
reflect(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"
).
Details
The object X
is reflected through the origin.
That is, each point in X
with coordinates
$(x,y)$ is mapped to the position $(-x, -y)$.
This is equivalent to applying the affine transformation with matrix
diag(c(-1,-1))
. It is also equivalent to rotation about the origin
by 180 degrees.
The command reflect
is generic, with a method for
pixel images and a default method.
Value
- Another object of the same type, representing the result of reflection.
See Also
Examples
plot(reflect(as.im(letterR)))
plot(reflect(letterR), add=TRUE)
Community examples
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