Monthly sunspot activity from 1974 to 2000

Source: R/BSDA-package.R

Data for Exercise 2.7

Yearsunspot

Format

A data frame/tibble with 252 observations on two variables

number

average number of sunspots

year

date

Source

NASA/Marshall Space Flight Center, Huntsville, AL 35812.

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples


plot(number ~ year, data = Yearsunspot)