The R Project SVN R

% File src/library/stats/man/plot.HoltWinters.Rd

% Part of the R package, http://www.R-project.org

% Copyright 1995-2009 R Core Team

% Distributed under GPL 2 or later

\name{plot.HoltWinters}

\alias{plot.HoltWinters}

\title{Plot function for HoltWinters objects}

\description{

  Produces a chart of the original time series along with the fitted

  values. Optionally, predicted values (and their confidence bounds) can

  also be plotted.

}

\usage{

\method{plot}{HoltWinters}(x, predicted.values = NA, intervals = TRUE,

        separator = TRUE, col = 1, col.predicted = 2,

        col.intervals = 4, col.separator = 1, lty = 1,

        lty.predicted = 1, lty.intervals = 1, lty.separator = 3,

        ylab = "Observed / Fitted",

        main = "Holt-Winters filtering",

        ylim = NULL, \dots)

}

\arguments{

  \item{x}{Object of class \code{"HoltWinters"}}

  \item{predicted.values}{Predicted values as returned by \code{predict.HoltWinters}}

  \item{intervals}{If \code{TRUE}, the prediction intervals are plotted (default).}

  \item{separator}{If \code{TRUE}, a separating line between fitted and predicted values is plotted (default).}

  \item{col, lty}{Color/line type of original data (default: black solid).}

  \item{col.predicted, lty.predicted}{Color/line type of

    fitted and predicted values (default: red solid).}

  \item{col.intervals, lty.intervals}{Color/line type of prediction

    intervals (default: blue solid).}

  \item{col.separator, lty.separator}{Color/line type of

    observed/predicted values separator (default: black dashed).}

  \item{ylab}{Label of the y-axis.}

  \item{main}{Main title.}

  \item{ylim}{Limits of the y-axis. If \code{NULL}, the range is chosen

    such that the plot contains the original series, the fitted values,

    and the predicted values if any.}

  \item{\dots}{Other graphics parameters.}

}

\references{

  C. C. Holt (1957)

  Forecasting trends and seasonals by exponentially weighted

  moving averages,

  \emph{ONR Research Memorandum, Carnegie Institute of Technology} \bold{52}.

  P. R. Winters (1960)

  Forecasting sales by exponentially weighted moving averages,

  \emph{Management Science} \bold{6}, 324--342.

}

\author{

  David Meyer \email{David.Meyer@wu.ac.at}

}

\seealso{

  \code{\link{HoltWinters}}, \code{\link{predict.HoltWinters}}

}

\keyword{ts}