mixdata.rd

这个包里面含有利用极大似然估计方法来拟合成组数据和条件数据的有限混合分布模型的函数

\name{mixdata}
\alias{as.mixdata}
\alias{is.mixdata}
\title{Mixed Data}
\description{
\code{as.mixdata} checks if its argument is mixed data, if true, 
it returns the data with class \code{"mixdata"}, if false, it 
returns \code{NULL}.

\code{is.mixdata} returns \code{TRUE} if its argument is of class 
\code{"mixdata"} and \code{FALSE} otherwise.
}
\usage{
as.mixdata(x)
is.mixdata(x)
}
\arguments{
  \item{x}{object to be tested.}
}
\details{
 Mixed data consist of grouped data and conditional data (if available).
 Grouped data is either a data frame or a matrix, whose first
 column should be right boundaries of grouping intervals where
 the first and last intervals are open-ended; whose second
 column should consist of the frequencies indicating numbers of
 observations falling into each interval. If conditional data
 are available, mixed data should have \emph{k} + 2 columns, where
 \emph{k} is the number of components, whose element in row \emph{j} and
 column \emph{i} + 2 is the number of observations from the \emph{j}th interval
 belonging to the \emph{i}th component.
}
\seealso{
 \code{\link{mixgroup}} to construct mixed data.
}
\examples{
data(pike65) # load data set `pike65'
pike65 # display the mixed data `pike65'
data(pike65sg) # load data set `pike65sg'
pike65sg # display the mixed data `pike65sg'
data(pikepar)
as.mixdata(pikepar)
as.mixdata(pike65)
is.mixdata(pike65)
is.mixdata(as.mixdata(pike65))
}
\keyword{classes}{mixdata}
\keyword{attribute}{mixdata}