\HeaderA{kernelpen}{Kernelpen function}{kernelpen}
\begin{Description}\relax
Krenel function used in the penalty term.
\end{Description}
\begin{Usage}
\begin{verbatim}
kernelpen(x, type="tricubic", param)

\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{x}] Real Value.
\item[\code{type}] Type of kernelpen to be used
\item[\code{param}] a named vector.
\end{ldescription}
\end{Arguments}
\begin{Details}\relax
The only kernel available is the "tricubic" kernel which takes
the values \eqn{(1 - (x/d)^3)^3}{}. The value of d is given by
\code{param=c(d=6)} for example.
\end{Details}
\begin{Author}\relax
Philippe Hupé, \email{Philippe.Hupe@curie.fr}
\end{Author}

