Plot non-numeric data
<p>How do we plot a non-numeric data in R? I want to plot (using any graph type - for example, boxplot or histogram ... etc) <code>aa</code> against <code>bb</code> . I want to have <code>bb</code> on my x-axis and <code>aa</code> on my y-axis.</p>

<pre><code>class(aa)
# [1] "character"
class(bb)
# [1] "character"
</code></pre>