>        Args:</span>
<span class="sd">            property_name(str): The property name that was used in the</span>
<span class="sd">            constructor.</span>

<span class="sd">        Returns:</span>
<span class="sd">            np.ndarray: An array of x-axis values.</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="n">prop</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">properties</span><span class="p">[</span><span cl