rotate.owin

From spatstat v1.64-1 by Adrian Baddeley

Rotate a Window

Rotates a window

Keywords: spatial, math

Usage

# S3 method for owin
rotate(X, angle=pi/2, …, rescue=TRUE, centre=NULL)

Arguments

X: A window (object of class "owin").
angle: Angle of rotation.
rescue: Logical. If TRUE, the rotated window will be processed by rescue.rectangle.
…: Optional arguments passed to as.mask controlling the resolution of the rotated window, if X is a binary pixel mask. Ignored if X is not a binary mask.
centre: 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).

Details

Rotates the window by the specified angle. Angles are measured in radians, anticlockwise. The default is to rotate the window 90 degrees anticlockwise. The centre of rotation is the origin, by default, unless centre is specified.

Value

Another object of class "owin" representing the rotated window.

Examples

# NOT RUN {
  w <- owin(c(0,1),c(0,1))
  v <- rotate(w, pi/3)
  e <- rotate(w, pi/2, centre="midpoint")
  
# }
# NOT RUN {
  plot(v)
  
# }
# NOT RUN {
  w <- as.mask(letterR)
  v <- rotate(w, pi/5)
# }

Documentation reproduced from package spatstat, version 1.64-1, License: GPL (>= 2)

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