https://github.com/cran/lattice
Tip revision: 8b463b99683a1841ccf6d9bdfb25a8b3991db481 authored by Deepayan Sarkar on 13 April 2007, 00:00:00 UTC
version 0.15-4
version 0.15-4
Tip revision: 8b463b9
banking.Rd
\name{banking}
\alias{banking}
\title{Banking}
\description{
Calculates banking slope
}
\usage{
banking(dx, dy)
}
\arguments{
\item{dx, dy}{ vector of consecutive x, y differences. }
}
\details{
\code{banking} is a crude banking function used when
\code{aspect = "xy"} in high level Trellis functions. It is usually not
very meaningful except with \code{xyplot}. It just considers the
absolute slopes (based on \code{dx} and \code{dy}) and returns a value
which when adjusted by the panel scale limits will make the median of
the above absolute slopes correspond to a 45 degree line.
This function was inspired by the discussion of banking in the
documentation for Trellis Graphics available at Bell Labs' website
(see \code{\link{Lattice}}), but is most likely identical to an
algorithm described previously by Cleveland et al (see below). It is
not clear (to the author) whether this is the algorithm used in
S-PLUS. Alternative banking rules, implemented as a similar function,
can be used as a drop-in replacement by suitably modifying
\code{lattice.options("banking")}.
}
\references{
Cleveland, William S., McGill, Marylyn E. and McGill, Robert (1988),
"The Shape Parameter of a Two-variable Graph",
\emph{Journal of the American Statistical Association}, 83, 289-300
}
\author{ Deepayan Sarkar \email{Deepayan.Sarkar@R-project.org}}
\seealso{\code{\link{Lattice}}, \code{\link{xyplot}}}
\keyword{dplot}