reflect

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Reflect In Origin

Reflects a geometrical object through the origin.

Keywords
spatial, math
Usage
reflect(X)

## S3 method for class 'im': reflect(X)

## S3 method for class 'default': reflect(X)

Arguments
X
Any suitable dataset representing a two-dimensional object, such as a point pattern (object of class "ppp"), or a window (object of class "owin").
Details

The object X is reflected through the origin. That is, each point in X with coordinates $(x,y)$ is mapped to the position $(-x, -y)$.

This is equivalent to applying the affine transformation with matrix diag(c(-1,-1)). It is also equivalent to rotation about the origin by 180 degrees.

The command reflect is generic, with a method for pixel images and a default method.

Value

  • Another object of the same type, representing the result of reflection.

See Also

affine, flipxy

Aliases
  • reflect
  • reflect.im
  • reflect.default
Examples
plot(reflect(as.im(letterR)))
  plot(reflect(letterR), add=TRUE)
Documentation reproduced from package spatstat, version 1.42-2, License: GPL (>= 2)

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