spatstat.geom (version 3.2-8)

rotate.psp: Rotate a Line Segment Pattern

Description

Rotates a line segment pattern

Usage

# S3 method for psp
rotate(X, angle=pi/2, ..., centre=NULL)

Value

Another object of class "psp" representing the rotated line segment pattern.

Arguments

X

A line segment pattern (object of class "psp").

angle

Angle of rotation.

...

Arguments passed to rotate.owin affecting the handling of the observation window, if it is a binary pixel 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).

Author

Adrian Baddeley

and Rolf Turner

Details

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.

See Also

psp.object, rotate.owin, rotate.ppp

Examples

  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)