# methods.distfun

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##### Geometrical Operations for Distance Functions

Methods for objects of the class "distfun".

Keywords
methods, spatial
##### Usage
# S3 method for distfun
shift(X, …)# S3 method for distfun
rotate(X, …)# S3 method for distfun
scalardilate(X, …)# S3 method for distfun
affine(X, …)# S3 method for distfun
flipxy(X)# S3 method for distfun
reflect(X)# S3 method for distfun
rescale(X, s, unitname)
##### Arguments
X

Object of class "distfun" representing the distance function of a spatial object.

Arguments passed to the next method for the geometrical operation. See Details.

s, unitname

Arguments passed to the next method for rescale.

##### Details

These are methods for the generic functions shift, rotate, scalardilate, affine, flipxy and reflect which perform geometrical operations on spatial objects, and for the generic rescale which changes the unit of length.

The argument X should be an object of class "distfun" representing the distance function of a spatial object Y. Objects of class "distfun" are created by distfun.

The methods apply the specified geometrical transformation to the original object Y, producing a new object Z of the same type as Y. They then create a new distfun object representing the distance function of Z.

##### Value

Another object of class "distfun".

distfun, methods.funxy.

##### Aliases
• methods.distfun
• shift.distfun
• rotate.distfun
• scalardilate.distfun
• affine.distfun
• flipxy.distfun
• reflect.distfun
• rescale.distfun
##### Examples
# NOT RUN {
(f <- distfun(letterR))
plot(f)
flipxy(f)
shift(f, origin="midpoint")
plot(rotate(f, angle=pi/2))

(g <- distfun(lansing))
rescale(g)
# }

Documentation reproduced from package spatstat, version 1.63-0, License: GPL (>= 2)

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