pan><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    Calculates the centered anomaly correlation.</span>

<span class="sd">    :param obs: (np.ma.array) - observation</span>
<span class="sd">    :param fcst: (np.ma.array) - forecast</span>
<span class="sd">    :param clim: (np.ma.array) - climatology</span>
<span class="sd">    :param idc: (np.array) - indices of grid points</span>
<span class="sd">    :return cac: (np.ma.array) - centered anomaly correlation</sp