an><span class="p">):</span>
<span class="w">    </span><span class="sd">&quot;&quot;&quot;Mean squared error</span>

<span class="sd">    Parameters</span>
<span class="sd">    ----------</span>
<span class="sd">    predictions, targets : array_like</span>
<span class="sd">        Time series or arrays to analyze</span>

<span class="sd">    Returns</span>
<span class="sd">    -------</span>
<span class="sd">    mse : vtools.data.timeseries.TimeSeries</span>
<span class="sd">        Mean squared error betw