 class="op">=</span><span class="st">"gray65"</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="histFromSum-4.png" alt="" width="700" height="433"></span>
<span class="r-in"><span><span class="co"># vectors from matrix</span></span></span>
<span class="r-in"><span><span class="fu">histFromSum</span><span class="op">(</span><span class="va">mat1</span><span class="op">[</span>,<span class="st">"lcat10"</span><span class="op">]</span>,<span class="va">mat1</span><span class="op">