sunspots                package:base                R Documentation

Monthly Sunspot Numbers, 1749-1983

Description:

     Monthly mean relative sunspot numbers from 1749 to 1983. 
     Collected at Swiss Federal Observatory, Zurich until 1960, then
     Tokyo Astronomical Observatory.

Usage:

     data(sunspots)

Format:

     A time series of monthly data from 1749 to 1983.

Source:

     Andrews, D. F. and Herzberg, A. M. (1985) Data: A Collection of
     Problems from Many Fields for the Student and Research Worker. New
     York: Springer-Verlag.

See Also:

     `sunspot.month' (package `ts') has a longer (and a bit different)
     series.

Examples:

     data(sunspots)
     plot(sunspots, main = "sunspots data", xlab = "Year",
          ylab = "Monthly sunspot numbers")

