Yearly Sunspot Data, 1700-1988.
Monthly Sunspot Data, 1749-1997.
Usage
data(sunspot)
Format
The univariate time series sunspot.year and
sunspot.month contain 289 and 2988 observations, respectively.
The objects are of class "ts".Description
Monthly and yearly number of sunspots.Source
Monthly data: SUNSPOT INDEX DATA CENTER,
WORLD DATA CENTER-C1 FOR SUNSPOT INDEX
ROYAL OBSERVATORY OF BELGIUM, Av. Circulaire, 3 - B-1180 BRUSSELS
http://www.oma.be/KSB-ORB/SIDC/sidc_txt.html
Yearly data: H. Tong (1996)
Non-Linear Time Series. Clarendon Press, Oxford, p. 471.
See Also
sunspot.month is a longer version of sunspots
in base R, that runs until 1988.