\Header{sunspot}{Yearly Sunspot Data, 1700--1988.
Monthly Sunspot Data, 1749--1997.}
\methalias{sunspot.month}{sunspot}
\methalias{sunspot.year}{sunspot}
\keyword{datasets}{sunspot}
\begin{Description}\relax
Monthly and yearly number of sunspots.\end{Description}
\begin{Usage}
\begin{verbatim}
data(sunspot)
\end{verbatim}
\end{Usage}
\begin{Format}\relax
The univariate time series \code{sunspot.year} and
\code{sunspot.month} contain 289 and 2988 observations, respectively.
The objects are of class \code{"ts"}.\end{Format}
\begin{Source}\relax
Monthly data: Sunspot Index Data Center,
World Data Center-C1 For Sunspot Index
Royal Observatory of Belgium, Av. Circulaire, 3, B-1180 BRUSSELS
\url{http://www.oma.be/KSB-ORB/SIDC/sidc_txt.html}

Yearly data: H. Tong (1996)
\emph{Non-Linear Time Series}. Clarendon Press, Oxford, p. 471.\end{Source}
\begin{SeeAlso}\relax
\code{sunspot.month} is a longer version of \code{\Link{sunspots}}
in base \R, that runs until 1988.\end{SeeAlso}

