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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")