class="c1"># Test use of CAM18sl with 1931_2 input xyz:</span>
    <span class="c1"># cieobs = &#39;1931_2&#39;</span>
    <span class="c1"># parameters[&#39;k&#39;] = np.array([[7.5768e+02, 7.5770e+02, 7.5744e+02]]) # k-factors for 1931_2</span>
    <span class="c1"># parameters[&#39;cieobs&#39;] = &#39;1931_2&#39;</span>
    
    <span class="c1"># Normalize to Lw:</span>
    <span class="n">Lw</span> <span class="o">=</span> <span class="mi">100</span>
    <span class="n">xyzw2</span> <span class="o">=</