shift.owin

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Apply Vector Translation To Window

Applies a vector shift to a window

Keywords
manip, spatial
Usage
# S3 method for owin
shift(X, vec=c(0,0), …, origin=NULL)
Arguments
X

Window (object of class "owin").

vec

Vector of length 2 representing a translation.

Ignored

origin

Character string determining a location that will be shifted to the origin. Options are "centroid", "midpoint" and "bottomleft". Partially matched.

Details

The window is translated by the vector vec. This is a method for the generic function shift.

If origin is given, then it should be one of the character strings "centroid", "midpoint" or "bottomleft". The argument vec will be ignored; instead the shift will be performed so that the specified geometric location is shifted to the origin. If origin="centroid" then the centroid of the window will be shifted to the origin. If origin="midpoint" then the centre of the bounding rectangle of the window will be shifted to the origin. If origin="bottomleft" then the bottom left corner of the bounding rectangle of the window will be shifted to the origin.

Value

Another window (of class "owin") representing the result of applying the vector shift.

See Also

shift, shift.ppp, periodify, rotate, affine, centroid.owin

Aliases
  • shift.owin
Examples
# NOT RUN {
  W <- owin(c(0,1),c(0,1))
  X <- shift(W, c(2,3))
  
# }
# NOT RUN {
  plot(W)
  # no discernible difference except coordinates are different
  
# }
# NOT RUN {
  shift(W, origin="mid")
# }
Documentation reproduced from package spatstat, version 1.57-1, License: GPL (>= 2)

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