Test Whether An Object Is Empty
Checks whether the argument is an empty window, an empty point pattern, etc.
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) ## Default S3 method: is.empty(x)
x |
A window (object of class |
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.
Logical value.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner r.turner@auckland.ac.nz
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.