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\name{show}
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\name{show}
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\alias{show}
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\alias{show}
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\alias{show-methods}
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\alias{show,ANY-method}
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\alias{show,traceable-method}
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\alias{show,ObjectsWithPackage-method}
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\alias{show,MethodDefinition-method}
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\alias{show,MethodWithNext-method}
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\alias{show,genericFunction-method}
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\alias{show,classRepresentation-method}
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\title{Show an Object}
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\title{Show an Object}
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\description{
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\description{
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  Display the object, by printing, plotting or whatever suits its class.
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  Display the object, by printing, plotting or whatever suits its
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  class.  This function exists to be specialized by methods.  The
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  default method calls \code{\link{showDefault}}.
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  The function \code{show} exists to be specialized by methods; the
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  default method calls \code{showDefault}.
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  Formal methods for \code{show} will
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  With package \pkg{methods} attached, methods for \code{show} will
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  usually be invoked for automatic printing (see the details).
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  usually be invoked for automatic printing (see the details).
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  The function \code{showDefault} allows redirection of output and
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  optional use of old-style print methods, but normally will not be
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  called directly.
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}
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}
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\usage{
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\usage{
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show(object)
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show(object)
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showDefault(object, oldMethods = TRUE)
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}
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}
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\arguments{
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\arguments{
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  \item{object}{Any R object}
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  \item{object}{Any R object}
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  \item{oldMethods}{Should old-style print methods be used for this
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    object?  \code{TRUE} by default if called directly, but \code{FALSE}
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    when called from the \pkg{methods} package for automatic printing (to
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    avoid potential recursion; see the details below).
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  }
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   }
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}
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}
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\value{
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\value{
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  \code{show} returns an invisible \code{NULL}.
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  \code{show} returns an invisible \code{NULL}.
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  For \code{showDefault}, if \code{printTo} is \code{FALSE}, the value
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  is a character vector containing the lines that would otherwise have
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  been printed.
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}
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}
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\details{
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\details{
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  The \pkg{methods} package overrides the base definition of
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  The \pkg{methods} package overrides the base definition of
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  \code{print.default} to arrange for automatic printing to honor
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  \code{print.default} to arrange for automatic printing to honor
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  methods for the function \code{show}.  This does not quite manage to
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  methods for the function \code{show}.  This does not quite manage to