\HeaderA{griddata objects}{Data interpolated to a grid objects.}{griddata objects}
\keyword{manip}{griddata objects}
\begin{Description}\relax
These are objects of classes 

\code{griddata}

These objects store the results of interpolating a 1-D regression data set to a grid which is a power of two in length
\end{Description}
\begin{Details}\relax
The help page for \code{\LinkA{makegrid}{makegrid}} and Kovac, (1997), p.81 give further details about how a \code{griddata} object is constructed.
\end{Details}
\begin{Value}
The following components must be included in a legitimate griddata object. 
\begin{ldescription}
\item[\code{gridt}] a vector containing the values of the grid on the "x" axis.
\item[\code{gridy}] a vector containing the values of the grid on the "y" axis. This vector has to be the same length as gridt. Typically the values in (\code{gridt, gridy}) are the results of interpolating arbitrary data (\code{x,y}) onto (\code{gridt, gridy}).
\item[\code{Gindex}] Each entry in \code{Gindex} refers to one of the pairs in (\code{x,y}) which is contributing to the (\code{gridt, gridy}) interpolant. See previous help for \code{G}.
\end{ldescription}
\end{Value}
\begin{Section}{GENERATION}
This class of objects is returned from the \code{\LinkA{makegrid}{makegrid}} function to represent the results of interpolating a 1-D regression data set to a grid.
\end{Section}
\begin{Section}{METHODS}
The \code{griddata} class of objects really on has one function that uses it: \code{\LinkA{irregwd}{irregwd}}.
\end{Section}
\begin{Section}{RELEASE}
Version 3.9.6 Copyright Arne Kovac 1997
Copyright Guy Nason (help pages) 1999.
\end{Section}
\begin{Section}{SEE ALSO}
\code{\LinkA{makegrid}{makegrid}}, \code{\LinkA{irregwd}{irregwd}}
\end{Section}

