\Header{SSI}{Simulates Sequential Spatial Inhibition Point Process}
\keyword{spatial}{SSI}
\begin{Description}\relax
Simulates SSI (sequential spatial inhibition) point process.\end{Description}
\begin{Usage}
\begin{verbatim}
SSI(n, r)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{n}] number of points

\item[\code{r}] inhibition distance

\end{ldescription}
\end{Arguments}
\begin{Details}\relax
uses the region set by \code{ppinit} or \code{ppregion}.\end{Details}
\begin{Value}
list of vectors of \code{x} and \code{y} coordinates\end{Value}
\begin{Section}{Side Effects}
Uses the random number generator.\end{Section}
\begin{Section}{WARNINGS}
will never return if \code{r} is too large and it cannot place \code{n} points\end{Section}
\begin{SeeAlso}\relax
\code{\Link{Psim}}, \code{\Link{Strauss}}\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
towns <- ppinit("towns.dat")
par(pty="s")
plot(Kfn(towns, 10), type="b", xlab="distance", ylab="L(t)")
lines(Kaver(10, 25, SSI(69,1.2)))
\end{ExampleCode}
\end{Examples}

