is.empty

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Percentile

Test Whether An Object Is Empty

Checks whether the argument is an empty window, an empty point pattern, etc.

Keywords
manip, spatial
Usage
is.empty(x)
## S3 method for class 'owin':
is.empty(x)
## S3 method for class 'ppp':
is.empty(x)
## S3 method for class 'psp':
is.empty(x)
## S3 method for class 'default':
is.empty(x)
Arguments
x
A window (object of class "owin"), a point pattern (object of class "ppp"), or a line segment pattern (object of class "psp").
Details

This function tests whether the object x represents an empty spatial object, such as an empty window, a point pattern with zero points, or a line segment pattern with zero line segments.

An empty window can be obtained as the output of intersect.owin, erosion, opening, complement.owin and some other operations.

An empty point pattern or line segment pattern can be obtained as the result of simulation.

Value

  • Logical value.

Aliases
  • is.empty
  • is.empty.owin
  • is.empty.ppp
  • is.empty.psp
  • is.empty.default
Documentation reproduced from package spatstat, version 1.24-1, License: GPL (>= 2)

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