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\name{clean.args}
\alias{clean.args}
\alias{remove.args}
\title{Remove inappropriate arguments from an argument list}
\description{
Takes a list of arguments and eliminates those that are not
appropriate for passing to a particular function (and hence
would produce an error if passed).
}
\usage{
clean.args(argstr,fn,exclude.repeats=FALSE,exclude.other=NULL,dots.ok=TRUE)
remove.args(argstr,fn)
}
\arguments{
\item{argstr}{a named list of arguments, e.g. from \samp{\dots}}
\item{fn}{a function}
\item{exclude.repeats}{(logical) remove repeated arguments?}
\item{exclude.other}{a character vector of names of additional arguments to remove}
\item{dots.ok}{should "..." be allowed in the argument list?}
}
\value{
\samp{clean.args} returns a list which is a copy of \samp{argstr} with
arguments inappropriate for \samp{fn} removed; \samp{remove.args}
removes the arguments for \samp{fn} from the list.
}
\author{Ben Bolker}
\examples{
tststr <- list(n=2,mean=0,sd=1,foo=4,bar=6)
clean.args(tststr,rnorm)
try(do.call("rnorm",tststr))
do.call("rnorm",clean.args(tststr,rnorm))
remove.args(tststr,rnorm)
## add example of combining arg. lists?
}
\keyword{programming}
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