sunspots: Monthly Sunspot Numbers, 1749-1983

Description Usage Format Source See Also Examples

Description

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

Usage

1

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 has a longer (and a bit different) series, sunspot.year is a much shorter one. See there for getting more current sunspot numbers.

Examples

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

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