1. Learn
    2. /
  2. Courses
    3. /
  3. Introduction to R

Exercise

Have a look at the structure

Another method that is often used to get a rapid overview of your data is the function str(). The function str() shows you the structure of your dataset. For a data frame it tells you:

  • The total number of observations (e.g. 32 car types)
  • The total number of variables (e.g. 11 car features)
  • A full list of the variables names (e.g. mpg, cyl … )
  • The data type of each variable (e.g. num)
  • The first observations

Applying the str() function will often be the first thing that you do when receiving a new dataset or data frame. It is a great way to get more insight in your dataset before diving into the real analysis.

Instructions

100 XP

Investigate the structure of mtcars. Make sure that you see the same numbers, variables and data types as mentioned above.