sunspots {datasets} | 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

    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` has a longer (and a bit different) series.

### Examples

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

[Package datasets version 2.3.1 Index]