range. In the top portion of this figure, the value 'black' is being mapped to a visual range spanned by colors (which, for discrete data, defaults to 'Set2')." width="100%" data-url="/interactives/intro-range.html" />
<p class="caption">
FIGURE 2.3: Using <code>I()</code> to supply visual properties directly instead of mapping values to a visual range. In the top portion of this figure, the value <code>'black'</code> is being mapped to a visual range spanned by <code>colors</code> (which, for discrete data