Filtering rows

Remove rows based on data values

We’ll move from cleaning columns to working with rows. We’ll use the {dplyr} filter() functions to only keep rows that we want to keep.

Learning objectives

• Filter rows based on data values
• Refine understanding of conditional statements
• Remove missing data
• Arrange rows based on data values

Pre-meeting

To prepare for this class meeting, please do the following:

• Read R4DS2 4.2

Class meeting

• Filtering basics
• Filtering with OR
• Multiple filters
• Negating conditional statements
• Filtering NA
• Arranging in ascending and descending order
• Slides and Code

Homework after the class meeting

Wrap up this lesson

• Complete the exercises

For next class meeting

• Read R4DS2 4.4