\name{panel.parallel}
\alias{panel.parallel}
\title{ Default Panel Function for parallel}
\description{
  This is the default panel function for \code{parallel}.
}
\usage{
panel.parallel(x, y, z, subscripts,
               groups = NULL,
               col, lwd, lty, alpha,
               common.scale = TRUE,
               lower,
               upper,
               \dots)
}
\arguments{
  \item{x, y}{ dummy variables, ignored. }
  \item{z}{
    The data frame used for the plot.  Each column will be coerced to
    numeric before being plotted, and an error will be issued if this
    fails.
  }
  \item{subscripts}{
    The indices of the rows of \code{z} that are to be displyed in this
    panel.
  }
  \item{groups}{
    An optional grouping variable.  If specified, different groups are
    distinguished by use of different graphical parameters (i.e., rows
    of \code{z} in the same group share parameters).
  }
  \item{col, lwd, lty, alpha}{
    graphical parameters (defaults to the settings for
    \code{superpose.line}).  If \code{groups} is non-null, these
    parameters used one for each group.  Otherwise, they are recycled
    and used to distinguish between rows of the data frame \code{z}.
  }
  \item{common.scale}{
    logical, whether a common scale should be used columns of \code{z}.
    Defaults to \code{FALSE}, in which case the horizontal range for
    each column is different (as determined by \code{lower} and
    \code{upper}).
  }
  \item{lower, upper}{
    numeric vectors replicated to be as long as the number of columns in
    \code{z}.  Determines the lower and upper bounds to be used for
    scaling the corresponding columns of \code{z} after coercing them to
    numeric.  Defaults to the minimum and maximum of each column.
  }
  \item{\dots}{ other arguments (ignored) }
}
\details{difficult to describe. See example for \code{parallel}}
\author{ Deepayan Sarkar \email{Deepayan.Sarkar@R-project.org}}
\seealso{\code{\link{parallel}}}
\keyword{dplot}