# is.subset.owin

From spatstat v1.18-4
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`

if`A`

is a sub-window of`B`

, otherwise`FALSE`

.

##### 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.
```

*Documentation reproduced from package spatstat, version 1.18-4, License: GPL (>= 2)*

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