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\name{sys.source}\alias{sys.source}\title{Parse and Evaluate Expressions from a File}\description{Parses expressions in the given file, and then successively evaluatesthem in the specified environment. By default, evaluation is done inthe global environment.}\usage{sys.source(file, envir = NULL)}\arguments{\item{file}{a character string naming the file to be read from}\item{envir}{an \R object specifying the environment in which theexpressions are to be evaluated. May also be a list or an integer.}}\details{The \code{keep.source} option is set to \code{FALSE} when reading fromthe file, so the source code is not kept (see \code{\link{options}}for more details).}\seealso{\code{\link{source}}}\keyword{file}\keyword{utilities}