iv class="ref-description section level2">
    <p>Get a circle from 3 points</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">circle_from_3_points</span><span class="op">(</span><span class="va">p1</span>, p2 <span class="op">=</span> <span class="cn">NULL</span>, p3 <span class="op">=</span> <span class="cn">NULL</span>, <span class