is.subset.owin
From spatstat v1.11-2
by Adrian Baddeley
Determine Whether One Window is Contained In Another
Tests whether window A
is a subset of window B
.
Usage
is.subset.owin(A, B)
Arguments
- A
- A window object (see Details).
- B
- A window object (see Details).
Details
This function tests whether the window A
is a subset
of the window B
.
The arguments A
and B
must be window objects
(either objects of class "owin"
, or data that can be
coerced to this class by as.owin
).
Various algorithms are used, depending on the geometrical type of the two windows.
Note that if B
is not rectangular, the algorithm proceeds by
discretising A
, converting it to a pixel mask using
as.mask
. In this case the resulting
answer is only ``approximately correct''. The accuracy of the
approximation can be controlled: see as.mask
.
Value
- Logical scalar;
TRUE
ifA
is a sub-window ofB
, otherwiseFALSE
.
Examples
w1 <- as.owin(c(0,1,0,1))
w2 <- as.owin(c(-1,2,-1,2))
is.subset.owin(w1,w2) # Returns TRUE.
is.subset.owin(w2,w1) # Returns FALSE.
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