pub fn sunspots() -> Result<DataFrame, PolarsError>Expand description
§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, ‘sunspot.year’ is a much shorter one. See there for getting more current sunspot numbers.
§Examples:
require(graphics)
plot(sunspots, main = "sunspots data", xlab = "Year",
ylab = "Monthly sunspot numbers")