# Chapter 8 Numbers and factors

Seeing numbers in a data file usually seem straightforward. However, erroneous interpretations of numeric information are among the most common errors for inexperienced data analysts.

The two key topics (and corresponding R packages) of this chapter are:

• numbers (and their representation in base R)

• factors (forcats)

Please note: This topic is not covered in Spring 2022.
Please proceed to the next Chapter 9: Text data.