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\description{
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\description{
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Show a summary of the methods for one or more generic functions,
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Show a summary of the methods for one or more generic functions,
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possibly restricted to those involving specified classes.
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possibly restricted to those involving specified classes.
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}
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}
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\usage{
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\usage{
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showMethods(f=character(), where=-1, classes=NULL, includeDefs=FALSE,
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showMethods(f = character(), where = topenv(parent.frame()), classes = NULL,
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inherited=TRUE, printTo = stdout())
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includeDefs = FALSE, inherited = TRUE, printTo = stdout())
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}
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}
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\arguments{
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\arguments{
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\item{f}{ One or more function names. If omitted, all functions
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\item{f}{one or more function names. If omitted, all functions
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will be examined. }
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will be examined. }
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\item{where}{If \code{where} is supplied, the methods definition from
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\item{where}{If \code{where} is supplied, the methods definition from
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that position will be used; otherwise, the current definition is
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that position will be used; otherwise, the current definition is
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used (which will include inherited methods that have arisen so far
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used (which will include inherited methods that have arisen so far
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in the session). If \code{f} is omitted, \code{where} controls
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in the session). If \code{f} is omitted, \code{where} controls
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where to look for generic functions.}
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where to look for generic functions.}
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\item{classes}{ If argument \code{classes} is supplied, it is a vector
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\item{classes}{ If argument \code{classes} is supplied, it is a vector
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of class names that restricts the displayed results to those methods
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of class names that restricts the displayed results to those methods
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whose signatures include one or more of those classes. }
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whose signatures include one or more of those classes. }
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\item{includeDefs}{ If \code{includeDefs} is \code{TRUE}, include the
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\item{includeDefs}{ If \code{includeDefs} is \code{TRUE}, include the
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definitions of the individual methods in the printout. }
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definitions of the individual methods in the printout. }
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\item{inherited}{ If \code{inherits} is \code{TRUE}, then methods that
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\item{inherited}{ If \code{inherits} is \code{TRUE}, then methods that
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have been found by inheritance, so far in the session, will be
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have been found by inheritance, so far in the session, will be
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included and marked as inherited. Note that an inherited method
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included and marked as inherited. Note that an inherited method
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will not usually appear until it has been used in this session.
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will not usually appear until it has been used in this session.
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See \code{\link{selectMethod}} if you want to know what method is
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See \code{\link{selectMethod}} if you want to know what method is
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dispatched for particular classes of arguments.}
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dispatched for particular classes of arguments.}
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\item{printTo}{The connection on which the printed information will be
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\item{printTo}{The connection on which the printed information will be
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written. If \code{printTo} is \code{FALSE}, the output will be
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written. If \code{printTo} is \code{FALSE}, the output will be
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collected as a character vector and returned as the value of the
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collected as a character vector and returned as the value of the
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call to \code{showMethod}. See \code{\link{show}}.
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call to \code{showMethod}. See \code{\link{show}}.
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}
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}
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While the programming interface for the \pkg{methods} package follows
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While the programming interface for the \pkg{methods} package follows
|
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the reference, the R software is an original implementation, so
|
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the reference, the R software is an original implementation, so
|
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details in the reference that reflect the S4 implementation may appear
|
55 |
details in the reference that reflect the S4 implementation may appear
|
| 56 |
differently in R. Also, there are extensions to the programming
|
56 |
differently in R. Also, there are extensions to the programming
|
| 57 |
interface developed more recently than the reference. For a
|
57 |
interface developed more recently than the reference. For a
|
| 58 |
discussion of details and ongoing development, see the web page
|
58 |
discussion of details and ongoing development, see the web page
|
| 59 |
\url{http://developer.r-project.org/methodsPackage.html} and the
|
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\url{http://developer.r-project.org/methodsPackage.html} and the
|
| 60 |
pointers from that page.
|
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pointers from that page.
|
| 61 |
}
|
61 |
}
|
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\seealso{
|
62 |
\seealso{
|
| 63 |
\code{\link{setMethod}}, and \code{\link{GenericFunctions}}
|
63 |
\code{\link{setMethod}}, and \code{\link{GenericFunctions}}
|
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for other tools involving methods;
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64 |
for other tools involving methods;
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\code{\link{selectMethod}} will show you the method dispatched for a
|
65 |
\code{\link{selectMethod}} will show you the method dispatched for a
|
| 66 |
particular function and signature of classes for the arguments.
|
66 |
particular function and signature of classes for the arguments.
|
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}
|
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}
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\examples{
|
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\examples{
|
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\dontshow{
|
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\dontshow{
|
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