sales.R

#' Sales data
#'
#' Sales data over 10 time periods.
#'
#' @format Time series data
#' @source Makridakis, Wheelwright and Hyndman (1998) \emph{Forecasting:
#' methods and applications}, John Wiley & Sons: New York. Chapter 5.
#' @keywords datasets
#' @examples
#' plot(sales,type="p")
#' abline(lsfit(1:10,sales))
#'
"sales"