ggplot.html'>ggplot</a></span>(<span class='no'>plot_set</span>, <span class='fu'><a href='https://ggplot2.tidyverse.org/reference/aes.html'>aes</a></span>(<span class='no'>h</span>, <span class='no'>n</span>)) + <span class='fu'><a href='https://ggplot2.tidyverse.org/reference/geom_bar.html'>geom_col</a></span>()</div><div class='img'><img src='format_interval-1.png' alt='' width='700' height='433' /></div><div class='input'>
<span class='co'># adding a character to indicate the hours of the interval.</spa