stackoverflow: match.call.defaults – R documentation

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match.call.defaults

Argument matching with defaults

This is a version of match.call which also includes default arguments.

match.call.defaults(definition = sys.function(sys.parent()),
  call = sys.call(sys.parent()), expand.dots = TRUE,
  envir = parent.frame(2L))

`definition`	a function, by default the function from which match.call is called. See details.
`call`	an unevaluated call to the function specified by definition, as generated by call.
`expand.dots`	ogical. Should arguments matching `...` in the call be included or left as a `...` argument?
`envir`	an environment, from which the `...` in call are retrieved, if any.

An object of class call.

Neal Fultz

foo <- function(x=NULL,y=NULL,z=4, dots=TRUE, ...) {
  match.call.defaults(expand.dots=dots)
}

foo(4,nugan='hand')
foo(dots=FALSE,who='ami')

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v0.7.0

CC BY-SA 4.0

Authors

Neal Fultz <nfultz@gmail.com> and the StackOverflow.com community

Initial release

2020-01-03