s were removed (1 values from `AGE` and 1 values from `sex`).</span></div><div class='img'><img src='age_pyramid-8.png' alt='' width='700' height='433' /></div><div class='input'>
<span class='co'># Stratify by case definition and customize with ggplot2</span>
<span class='no'>ap</span> <span class='kw'>&lt;-</span> <span class='fu'>age_pyramid</span>(<span class='no'>dat</span>, <span class='kw'>age_group</span> <span class='kw'>=</span> <span class='no'>AGE</span>, <span class='kw'>split_by</span> <span c