powered by
Time series data set of annual counts of sunspots.
ex1509
A data frame with 200 observations on the following 2 variables.
Year
year
Spots
number of sunspots
Waldmeier, M. (1961). The Sunspot Activity in the Years 1610--1960, Federal Observatory, Zurich.
str(ex1509)
Run the code above in your browser using DataLab