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Rotates a line segment pattern
# S3 method for psp
rotate(X, angle=pi/2, …, centre=NULL)
A line segment pattern (object of class "psp"
).
Angle of rotation.
Arguments passed to rotate.owin
affecting
the handling of the observation window, if it is a binary pixel
mask.
Centre of rotation.
Either a vector of length 2, or a character string
(partially matched to "centroid"
, "midpoint"
or "bottomleft"
).
The default is the coordinate origin c(0,0)
.
Another object of class "psp"
representing the
rotated line segment pattern.
The line segments of the pattern, and the window of observation, are rotated about the origin by the angle specified. Angles are measured in radians, anticlockwise. The default is to rotate the pattern 90 degrees anticlockwise. If the line segments carry marks, these are preserved.
# NOT RUN {
oldpar <- par(mfrow=c(2,1))
X <- psp(runif(10), runif(10), runif(10), runif(10), window=owin())
plot(X, main="original")
Y <- rotate(X, pi/4)
plot(Y, main="rotated")
par(oldpar)
# }
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