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\description{
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\description{
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  Returns the first or last parts of a vector, matrix, data frame or function.
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  Returns the first or last parts of a vector, matrix, data frame or function.
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}
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}
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\usage{
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\usage{
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head(x, \dots)
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head(x, \dots)
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\method{head}{default}(x, n=6)
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\method{head}{default}(x, n=6, \dots)
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\method{head}{data.frame}(x, n=6)
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\method{head}{data.frame}(x, n=6, \dots)
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tail(x, \dots)
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tail(x, \dots)
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\method{tail}{default}(x, n=6)
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\method{tail}{default}(x, n=6, \dots)
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\method{tail}{data.frame}(x, n=6)
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\method{tail}{data.frame}(x, n=6, \dots)
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}
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}
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\arguments{
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\arguments{
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  \item{x}{an object}
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  \item{x}{an object}
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  \item{n}{size for the resulting object: number of elements for a
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  \item{n}{size for the resulting object: number of elements for a
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    vector (including lists), rows for a matrix or data frame or
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    vector (including lists), rows for a matrix or data frame or
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    lines for a function.}
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    lines for a function.}
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  \item{\dots}{arguments to be passed to or from other methods.}
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}
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}
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\details{
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\details{
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  For matrices and data frames, the first/last \code{n} rows are returned.
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  For matrices and data frames, the first/last \code{n} rows are returned.
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  For functions, the first/last \code{n} lines of the deparsed function are
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  For functions, the first/last \code{n} lines of the deparsed function are
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  returned as character strings.
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  returned as character strings.