code>. In our case, we have specified the types of the columns manually when importing the data; if not specified, <code>readr::read_csv()</code> as most other import functions will guess the data type for each column based on the first x observations.</p>
<p>The data encoding is especially important when exploring chart options and writing ggplot code. You should be familiar if the data is encoded as quantitative or qualitative, if it contains missing or unusual values. Thus, it is always worth to check th