spots {TSA}

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.

Usage

data(spots)

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

References

"Time Series Analysis, with Applications in R" by J.D. Cryer and K.S. Chan

Examples

data(spots)
## maybe str(spots) ; plot(spots) ...