Chapter 3: Data Management

The following are the activity solutions for this chapter.

Activity: Creating and Manipulating Factor Variables

Use the following code to load the datasets library:

library(datasets)

Use the following code to load the diamonds dataset:

data("diamonds")

The function str() can be used to examine the diamonds dataset as follows:

str(diamonds)

We understand that there are three factors of ordered type as we examine the diamonds dataset. To identify the class of those factors, we can use the function class() as follows:

class(diamonds$cut)
class(diamonds$color)
class(diamonds$clarity)

The following code can be used to load the midwest dataset:

data("midwest")

The str() function can be...