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\arguments{
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\arguments{
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  \item{xlim, ylim}{numeric of length 2, giving the x and y coordinates
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  \item{xlim, ylim}{numeric of length 2, giving the x and y coordinates
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    ranges.}
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    ranges.}
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  \item{log}{character; indicating which axes should be in log scale.}
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  \item{log}{character; indicating which axes should be in log scale.}
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  \item{asp}{numeric, giving the \bold{asp}ect ratio y/x.}
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  \item{asp}{numeric, giving the \bold{asp}ect ratio y/x.}
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  \item{\dots}{further graphical parameters as in \code{\link{par}}.}
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  \item{\dots}{further graphical parameters as in \code{\link{par}}.
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    Relevant ones are \code{xaxs}, \code{yaxs} and \code{lab}.
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  }
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}
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}
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\details{
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\details{
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  Note that if \code{asp} is a finite positive value then the window is
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  Note that if \code{asp} is a finite positive value then the window is
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  set up so that one data unit in the x direction is equal in length to
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  set up so that one data unit in the x direction is equal in length to
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  \code{asp} \eqn{\times}{*} one data unit in the y direction.
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  \code{asp} \eqn{\times}{*} one data unit in the y direction.
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  Usually, one should rather use the higher level functions such as
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  Usually, one should rather use the higher level functions such as
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  \code{\link{plot}}, \code{\link{hist}}, \code{\link{image}}, \dots,
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  \code{\link{plot}}, \code{\link{hist}}, \code{\link{image}}, \dots,
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  instead and refer to their help pages for explanation of the
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  instead and refer to their help pages for explanation of the
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  arguments.
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  arguments.
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  A side-effect of the call is to set up the \code{usr}, \code{xaxp} and
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  \code{yaxp} graphical parameters.  (It is for the latter two that
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  \code{lab} is used.)
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}
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}
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\seealso{
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\seealso{
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  \code{\link{xy.coords}},
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  \code{\link{xy.coords}},
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  \code{\link{plot.xy}},
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  \code{\link{plot.xy}},
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  \code{\link{plot.default}}.
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  \code{\link{plot.default}}.