# tiles.empty

From spatstat v1.52-1
by Adrian Baddeley

##### Check For Empty Tiles in a Tessellation

Checks whether each tile in a tessellation is empty or non-empty.

##### Usage

`tiles.empty(x)`

##### Arguments

- x
A tessellation (object of class

`"tess"`

).

##### Details

A tessellation is a collection of disjoint spatial regions
(called *tiles*) that fit together to form a larger spatial
region. See `tess`

.

It is possible for some tiles of a tessellation to be empty.
For example, this can happen
when the tessellation `x`

is obtained by restricting
another tessellation `y`

to a smaller spatial domain `w`

.

The function `tiles.empty`

checks whether each tile is empty
or non-empty. The result is a logical vector,
with entries equal to `TRUE`

when the corresponding tile is
empty. Results are given in the same order
as the tiles would be listed by `tiles(x)`

.

##### Value

A logical vector.

##### See Also

##### Examples

```
# NOT RUN {
A <- tess(xgrid=0:2,ygrid=0:2)
tiles.empty(A)
v <- as.im(function(x,y){factor(round(x^2 + y^2))}, W=owin())
E <- tess(image=v)
tiles.empty(E)
# }
```

*Documentation reproduced from package spatstat, version 1.52-1, License: GPL (>= 2)*

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