spots: Relative annual sunspot number / time series
Description
Annual American (relative) sunspot numbers collected
from 1945 to 2007.
The annual (relative) sunspot number is a weighted average of
solar activities measured from a network of observatories.format
The format is:
Time-Series [1:61] from 1945 to 2005: 32.3 99.9 170.9 166.6 174.1 ...source
http://www.ngdc.noaa.gov/stp/SOLAR/ftpsunspotnumber.html#american}
"Time Series Analysis, with Applications in R" by J.D. Cryer and K.S. Chan
data(spots)
## maybe str(spots) ; plot(spots) ...
datasets