quarterly_sunspots | R Documentation |
Quarterly mean relative sunspots number from 1749-1983
quarterly_sunspots
A data frame with 940 rows and 4 variables
quarter
total number of sunspots
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.
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