Quick, have a look at your data set

Wow, that is a lot of cars!

Working with large data sets is not uncommon in data analysis. When you work with (extremely) large data sets and data frames, your first task as a data analyst is to develop a clear understanding of its structure and main elements. Therefore, it is often useful to show only a small part of the entire data set.

So how to do this in R? Well, the function head() enables you to show the first observations of a data frame. Similarly, the function tail() prints out the last observations in your data set.

Both head() and tail() print a top line called the 'header', which contains the names of the different variables in your data set.

Call head() on the mtcars data set to have a look at the header and the first observations.

Take Hint (-30 XP)

Exercise

Quick, have a look at your data set

Instructions