Extract Boundary Edges of a Window.
Extracts the boundary edges of a window and returns them as a line segment pattern.
edges(x, ..., window = NULL, check = FALSE)
x |
A window (object of class |
... |
Ignored. |
window |
Window to contain the resulting line segments.
Defaults to |
check |
Logical. Whether to check the validity of the resulting segment pattern. |
The boundary edges of the window x will be extracted as a line
segment pattern.
A line segment pattern (object of class "psp").
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.
perimeter for calculating the total length of the boundary.
edges(square(1)) edges(letterR)
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