Read a Point Process Object from a File

Read a file in standard format and create a point process object.

Usage

ppinit(file)

Arguments

file

string giving file name

Value

class "pp" object with components x, y, xl, xu, yl, yu

Details

The file should contain

the number of points
a header (ignored)
xl xu yl yu scale
x y (repeated n times)

Side Effects

Calls ppregion to set the domain.

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

See also

ppregion

Examples

towns <- ppinit("towns.dat")
par(pty="s")
plot(Kfn(towns, 10), type="b", xlab="distance", ylab="L(t)")