sunspot {ts} | R Documentation |
Monthly and yearly number of sunspots.
data(sunspot)
The univariate time series sunspot.year
and
sunspot.month
contain 289 and 2988 observations, respectively.
The objects are of class "ts"
.
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.
sunspot.month
is a longer version of sunspots
in base R, that runs until 1988.