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    <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">devfun2</span><span class="op">(</span><span class="va">fm</span>, useSc <span class="op">=</span> <span class="kw">if</span><span class="op">(</span><span class="fu"><a href="isREML.html">isLMM</a></span><span class="op">(</span><span class="va">fm</span><span class="op">)</span><span class="o