%% $Id: biplot.mvr.Rd 92 2006-09-20 17:44:25Z bhm $\encoding{latin1}\name{biplot.mvr}\alias{biplot.mvr}\title{Biplots of PLSR and PCR Models.}\description{  Biplot method for \code{mvr} objects.}\usage{\method{biplot}{mvr}(x, comps = 1:2, which = c("x", "y", "scores", "loadings"),           var.axes = FALSE, xlabs, ylabs, main, \dots)}\arguments{  \item{x}{an \code{mvr} object.}  \item{comps}{integer vector of length two.  The components to plot.}  \item{which}{character.  Which matrices to plot.  One of \code{"x"} (X    scores and loadings), \code{"y"} (Y scores and loadings),    \code{"scores"} (X and Y scores) and \code{"loadings"} (X and Y loadings).}  \item{var.axes}{logical.  If \code{TRUE}, the second set of points    have arrows representing them.}  \item{xlabs}{either a character vector of labels for the first set of    points, or \code{FALSE} for no labels.  If missing, the row names of    the first matrix is used as labels.}  \item{ylabs}{either a character vector of labels for the second set of    points, or \code{FALSE} for no labels.  If missing, the row names of    the second matrix is used as labels.}  \item{main}{character.  Title of plot.  If missing, a title is    constructed by \code{biplot.mvr}.}  \item{\dots}{Further arguments passed on to \code{biplot.default}.}}\details{  \code{biplot.mvr} can also be called through the \code{mvr} plot  method by specifying \code{plottype = "biplot"}.}\author{Ron Wehrens and Bj鴕n-Helge Mevik}\seealso{\code{\link{mvr}}, \code{\link{plot.mvr}}, \code{\link{biplot.default}}}\examples{data(oliveoil)mod <- plsr(sensory ~ chemical, data = oliveoil)\dontrun{## These are equivalentbiplot(mod)plot(mod, plottype = "biplot")## The four combinations of x and y points:par(mfrow = c(2,2))biplot(mod, which = "x") # Defaultbiplot(mod, which = "y")biplot(mod, which = "scores")biplot(mod, which = "loadings")}}\keyword{regression}\keyword{multivariate}\keyword{hplot}