spatstat (version 1.56-0)

methods.layered: Methods for Layered Objects

Description

Methods for geometrical transformations of layered objects (class "layered").

Usage

# S3 method for layered
shift(X, vec=c(0,0), ...)
  # S3 method for layered
rotate(X, ..., centre=NULL)
  # S3 method for layered
affine(X, ...)
  # S3 method for layered
reflect(X)
  # S3 method for layered
flipxy(X)
  # S3 method for layered
rescale(X, s, unitname)
  # S3 method for layered
scalardilate(X, ...)

Arguments

X

Object of class "layered".

…

Arguments passed to the relevant methods when applying the operation to each layer of X.

s

Rescaling factor passed to the relevant method for rescale. May be missing.

vec

Shift vector (numeric vector of length 2).

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).

unitname

Optional. New name for the unit of length. A value acceptable to the function unitname<-

Value

Another object of class "layered".

Details

These are methods for the generic functions shift, rotate, reflect, affine, rescale, scalardilate and flipxy for the class of layered objects.

A layered object represents data that should be plotted in successive layers, for example, a background and a foreground. See layered.

See Also

layered

Examples

# NOT RUN {
  L <- layered(letterR, runifpoint(20, letterR))
  plot(L)
  plot(rotate(L, pi/4))
# }