out = sunspot_year () ¶Yearly Sunspot Data, 1700-1988
Yearly numbers of sunspots from 1700 to 1988 (rounded to one digit).
yearYear of the observation.
sunspotsNumber of sunspots.
H. Tong (1996) Non-Linear Time Series. Clarendon Press, Oxford, p. 471.
t = octave.dataset.sunspot_year;
figure
plot (t.year, t.sunspots)
xlabel ("Year")
ylabel ("Sunspots")