Session Ready
Exercise

Examine the variables in the data set

For the following exercises we are using the nasa_fireball data, a data set of reported fireball events. Explore the variables in this data set. The nasa_fireball data frame is already loaded.

Instructions
100 XP
  • Print the nasa_fireball data frame.
  • Examine the types of variables present by sapply()-ing class().
  • Observe the number of observations in this data frame using nrow().
  • Check which columns, if any, contain missing data by sapply()-ing anyNA().