datasets (version 3.5.3)

sunspots: 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

sunspots

Format

A time series of monthly data from 1749 to 1983.

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

# NOT RUN {
require(graphics)
plot(sunspots, main = "sunspots data", xlab = "Year",
     ylab = "Monthly sunspot numbers")
# }