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 class '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

• shift.owin
Examples
W <- owin(c(0,1),c(0,1))
X <- shift(W, c(2,3))
plot(W)
# no discernible difference except coordinates are different
shift(W, origin="mid")
Documentation reproduced from package spatstat, version 1.31-3, License: GPL (>= 2)

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