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8.2.45.64 octave.dataset.sunspots

Static Method: out = 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.

Format

month

Month of the observation.

sunspots

Number of observed sunspots.

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.

Examples

t = octave.dataset.sunspots;

figure
plot (datenum (t.month), t.sunspots)
datetick ("x")
xlabel ("Date")
ylabel ("Monthly sunspot numbers")
title ("sunspots data")