class="fu">number_of_features</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S4 method for OptimizationProblem</span></span>
<span><span class="fu">number_of_features</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></span></code></pre></div>
    </div>

    <div id="arguments">
    <h2>Arguments</h2>
    <dl><dt>x</dt>
<dd><p><a href="ProjectProblem-class.html">ProjectProblem</a> or
<a href="Opt