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\name{F_1_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 = FALSE,
lower,
upper,
\dots,
horizontal.axis = TRUE,
identifier = "parallel")
}
\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.
Alternatively, these could be functions (to be applied on each
column) that return a scalar.
}
\item{\dots}{ other arguments (ignored) }
\item{horizontal.axis}{logical indicating whether the parallel axes should
be laid out horizontally (\code{TRUE}) or vertically (\code{FALSE}).
}
\item{identifier}{
A character string that is prepended to the names of grobs
that are created by this panel function.
}
}
\details{ Produces parallel coordinate plots, which are easier to
understand from an example than through a verbal description. See
example for \code{\link{parallel}}
}
\references{
Inselberg, Alfred (2009) \emph{Parallel Coordinates: Visual
Multidimensional Geometry and Its Applications}, Springer. ISBN:
978-0-387-21507-5.
Inselberg, A. (1985) \dQuote{The Plane with Parallel Coordinates},
\emph{The Visual Computer}.
}
\author{ Deepayan Sarkar \email{Deepayan.Sarkar@R-project.org}}
\seealso{\code{\link{parallel}}}
\keyword{dplot}
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