<span class="sd">    </span>
<span class="sd">    Args:</span>
<span class="sd">        :xyzt: </span>
<span class="sd">            | ndarray with tristimulus values of test data.</span>
<span class="sd">        :xyzr:</span>
<span class="sd">            | ndarray with tristimulus values of reference data.</span>
<span class="sd">        :DEtype:</span>
<span class="sd">            | &#39;jab&#39; or str, optional</span>
<span class="sd">            | Options: </span>
<span class="sd">            |    - &#3