"op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># histogram</span></span></span>
<span class="r-in"><span><span class="co"># ggplot2</span></span></span>
<span class="r-in"><span><span class="fu">rfm_plot_histogram</span><span class="op">(</span><span class="va">rfm_order</span>, metric <span class="op">=</span> <span class="st">"frequency"</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="rfm_plot_histogram-1.png" a