1\name{ppp-class}
2\docType{class}
3\alias{ppp-class}
4\alias{owin-class}
5\alias{im-class}
6\alias{psp-class}
7
8\title{Virtual class "ppp" }
9\description{ Virtual S4 class definition for S3 classes in the spatstat package to allow S4-style coercion to these classes}
10\section{Objects from the Class}{A virtual Class: No objects may be created from it.}
11\author{ Edzer J. Pebesma }
12\keyword{classes}
13