

   YYeeaarrllyy SSuunnssppoott DDaattaa,, 11770000--11998888..  MMoonntthhllyy SSuunnssppoott DDaattaa,,
   11774499--11999977..

        data(sunspot)

   FFoorrmmaatt::

        The univariate time series `sunspot.year' and
        `sunspot.month' contain 289 and 2988 observations,
        respectively.  The objects are of class `"ts"'.

   DDeessccrriippttiioonn::

        Monthly and yearly number of sunspots.

   SSoouurrccee::

        Monthly data: SUNSPOT INDEX DATA CENTER, WORLD DATA
        CENTER-C1 FOR SUNSPOT INDEX ROYAL OBSERVATORY OF BEL-
        GIUM, Av. Circulaire, 3 - B-1180 BRUSSELS <URL:
        http://www.oma.be/KSB-ORB/SIDC/sidc_txt.html>

        Yearly data: H. Tong (1996) Non-Linear Time Series.
        Clarendon Press, Oxford, p. 471.

   SSeeee AAllssoo::

        `sunspot.month' is a longer version of `sunspots' in
        base R, that runs until 1988.

