# hyytiala

##### Scots pines and other trees at Hyytiala

This dataset is a spatial point pattern of trees recorded at

The dataset `hyytiala`

is a point pattern
(object of class `"ppp"`

) containing the spatial coordinates
of each tree, marked by species (a factor with levels `aspen`

,
`birch`

, `pine`

and `rowan`

).
The survey region is a 20 by 20 metre square.
Coordinates are given in metres.

##### Usage

`data(hyytiala)`

##### source

Nicolas Picard

##### References

Kokkila, T., *Silva Fennica* **36** 265--277.

Picard, N, Bar-Hen, A., Mortier, F. and Chadoeuf, J. (2009)
The multi-scale marked area-interaction point process: a model for
the spatial pattern of trees.
*Scandinavian Journal of Statistics* **36** 23--41

##### Examples

```
data(hyytiala)
plot(hyytiala, cols=2:5)
```

*Documentation reproduced from package spatstat, version 1.31-3, License: GPL (>= 2)*