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\name{sample-methods}
\alias{sample,data.frame-method}
\alias{sample,data.set-method}
\alias{sample,importer-method}
\title{Take a Sample from a Data Frame-like Object}
\description{
The methods below are convenience short-cuts to
take samples from data frames and data sets.
They result in a data frame or data set, respectively,
the rows of which are a sample of the complete
data frame/data set.
}
\usage{
\S4method{sample}{data.frame}(x, size, replace = FALSE, prob = NULL)
\S4method{sample}{data.set}(x, size, replace = FALSE, prob = NULL)
\S4method{sample}{importer}(x, size, replace = FALSE, prob = NULL)
}
\arguments{
\item{x}{a data frame or data set.}
\item{size}{an (optional) numerical value, the sample size,
defaults to the total number of rows of \code{x}.}
\item{replace}{a logical value, determines whether
sampling takes place with or without replacement.}
\item{prob}{a vector of sampling probabities or NULL.}
}
\value{A data frame or data set.}
\examples{
for(.i in 1:4)
print(sample(iris,5))
}
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