powered by
The E9.21 data frame has 11 rows and 2 columns.
E9.21
data(E9.21)
This data frame contains the following columns:
a numeric vector, units not given, probably years.
a numeric vector, units not given.
data(E9.21) summary(E9.21) plot(E9.21)
Run the code above in your browser using DataLab