# plot.owin

From spatstat v1.0-1
by Adrian Baddeley

##### Plot a Spatial Window

Plot a two-dimensional window of observation for a spatial point pattern

- Keywords
- spatial

##### Usage

`plot.owin(x, main, ..., box=TRUE, edge=0.04)`

##### Arguments

- x
- The window to be plotted.
An object of class
`owin`

, or data which can be converted into this format by`as.owin()`

. - main
- text to be displayed as a title above the plot.
- ...
- extra arguments passed to the generic
`plot`

function. - box
- logical flag; if
`TRUE`

, plot the enclosing rectangular box - edge
- nonnegative number; the plotting region will have coordinate limits
that are
`1 + edge`

times as large as the limits of the rectangular box that encloses the pattern.

##### Details

This is the `plot`

method for the class `owin`

.
The action is to plot the boundary of the window on the current plot device,
using equal scales on the `x`

and `y`

axes.

If the window `x`

is of type `"rectangle"`

or `"polygonal"`

,
the boundary of the window is plotted as a polygon or series of polygons.
If `x`

is of type `"mask"`

the discrete raster approximation of the window is displayed
as a binary image (white inside the window, black outside).

##### Value

- none.

##### See Also

##### Examples

```
library(spatstat)
# rectangular window
data(nztrees)
plot(nztrees$window)
abline(v=148, lty=2)
# polygonal window
plot(c(0,1),c(0,1),type="n")
bdry <- locator()
# click the vertices of a polygon (anticlockwise)
w <- owin(c(0,1), c(0,1), poly=bdry)
plot(w)
# binary mask
we <- erode.owin(w, 0.05, FALSE)
plot(we)
```

*Documentation reproduced from package spatstat, version 1.0-1, License: GPL version 2 or newer*

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