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  \code{fun.first} and, if it finds it, applied it to the object.  If no
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  \code{fun.first} and, if it finds it, applied it to the object.  If no
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  such function is found a function called \code{fun.second} is tried.
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  such function is found a function called \code{fun.second} is tried.
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  If no class name produces a suitable function, the function
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  If no class name produces a suitable function, the function
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  \code{fun.default} is used.
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  \code{fun.default} is used.
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  Function \code{\link{methods}} can be used to find out about the
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  Function \code{\link[utils]{methods}} can be used to find out about the
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  methods for a particular generic function or class.
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  methods for a particular generic function or class.
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  Now for some obscure details that need to appear somewhere.  These
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  Now for some obscure details that need to appear somewhere.  These
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  comments will be slightly different than those in Appendix A of the
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  comments will be slightly different than those in Appendix A of the
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  White S Book. \code{UseMethod} creates a \dQuote{new} function call with
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  White S Book. \code{UseMethod} creates a \dQuote{new} function call with
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  The function \code{.isMethodsDispatchOn()} returns \code{TRUE} if
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  The function \code{.isMethodsDispatchOn()} returns \code{TRUE} if
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  the S4 method dispatch has been turned on in the evaluator. It is
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  the S4 method dispatch has been turned on in the evaluator. It is
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  meant for \R internal use only.
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  meant for \R internal use only.
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}
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}
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\seealso{
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\seealso{
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  \code{\link{methods}}, \code{\link[base]{class}}, \code{\link{getS3method}}
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  \code{\link[utils]{methods}}, \code{\link[base]{class}}, \code{\link[utils]{getS3method}}
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}
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}
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\references{
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\references{
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  Chambers, J. M. (1992)
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  Chambers, J. M. (1992)
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  \emph{Classes and methods: object-oriented programming in S.}
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  \emph{Classes and methods: object-oriented programming in S.}
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  Appendix A of \emph{Statistical Models in S}
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  Appendix A of \emph{Statistical Models in S}