Determine whether a window is a
rectangle, a polygonal region, or a binary mask.
Usage
is.rectangle(w)
is.polygonal(w)
is.mask(w)
Arguments
w
Window to be inspected. An object of class "owin".
Value
Logical value, equal to TRUE if w is a window
of the specified type.
Details
These simple functions determine whether a window w
(object of class "owin") is
a rectangle (is.rectangle(w) = TRUE),
a domain with polygonal boundary (is.polygonal(w) = TRUE),
or
a binary pixel mask (is.mask(w) = TRUE).