as.fv.Rd
\name{as.fv}
\alias{as.fv}
\alias{as.fv.fv}
\alias{as.fv.fasp}
\alias{as.fv.data.frame}
\alias{as.fv.matrix}
\alias{as.fv.minconfit}
\alias{as.fv.dppm}
\alias{as.fv.kppm}
\alias{as.fv.bw.optim}
\title{Convert Data To Class fv}
\description{
Converts data into a function table (an object of class \code{"fv"}).
}
\usage{
as.fv(x)
\method{as.fv}{fv}(x)
\method{as.fv}{data.frame}(x)
\method{as.fv}{matrix}(x)
\method{as.fv}{fasp}(x)
\method{as.fv}{minconfit}(x)
\method{as.fv}{dppm}(x)
\method{as.fv}{kppm}(x)
\method{as.fv}{bw.optim}(x)
}
\arguments{
\item{x}{Data which will be converted into a function table}
}
\value{
An object of class \code{"fv"} (see \code{\link{fv.object}}).
}
\details{
This command converts data \code{x}, that
could be interpreted as the values of a function,
into a function value table (object of the class \code{"fv"}
as described in \code{\link{fv.object}}). This object can then
be plotted easily using \code{\link{plot.fv}}.
The dataset \code{x} may be any of the following:
\itemize{
\item
an object of class \code{"fv"};
\item
a matrix or data frame with at least two columns;
\item
an object of class \code{"fasp"}, representing an array of
\code{"fv"} objects.
\item
an object of class \code{"minconfit"}, giving the results
of a minimum contrast fit by the command \code{\link{mincontrast}}.
The
\item
an object of class \code{"kppm"}, representing a fitted
Cox or cluster point process model, obtained from the
model-fitting command \code{\link{kppm}};
\item
an object of class \code{"dppm"}, representing a fitted
determinantal point process model, obtained from the
model-fitting command \code{\link{dppm}};
\item
an object of class \code{"bw.optim"}, representing an optimal
choice of smoothing bandwidth by a cross-validation method, obtained
from commands like \code{\link{bw.diggle}}.
}
The function \code{as.fv} is generic, with methods for each of the
classes listed above. The behaviour is as follows:
\itemize{
\item
If \code{x} is an object of class \code{"fv"}, it is
returned unchanged.
\item
If \code{x} is a matrix or data frame,
the first column is interpreted
as the function argument, and subsequent columns are interpreted as
values of the function computed by different methods.
\item
If \code{x} is an object of class \code{"fasp"}
representing an array of \code{"fv"} objects,
these are combined into a single \code{"fv"} object.
\item
If \code{x} is an object of class \code{"minconfit"},
or an object of class \code{"kppm"} or \code{"dppm"},
the result is a function table containing the
observed summary function and the best fit summary function.
\item
If \code{x} is an object of class \code{"bw.optim"},
the result is a function table of the optimisation criterion
as a function of the smoothing bandwidth.
}
}
\examples{
r <- seq(0, 1, length=101)
x <- data.frame(r=r, y=r^2)
as.fv(x)
}
\author{
\spatstatAuthors
}
\keyword{spatial}
\keyword{manip}