

   sunspot {ts}                                 R Documentation

   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..

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

        Monthly and yearly number of sunspots.

   UUssaaggee::

        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"'.

   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.

