 p(z)  \sum \sum  p(x,y|z) \log</span>
<span class="sd">                \frac{ p(x,y |z)}{p(x|z)\cdot p(y |z)} \,dx dy dz</span>

<span class="sd">    Parameters</span>
<span class="sd">    ----------</span>
<span class="sd">    n_symbs : int, optional (default: None)</span>
<span class="sd">        Number of symbols in input data. Should be at least as large as the</span>
<span class="sd">        maximum array entry + 1. If None, n_symbs is inferred by scipy&#39;s crosstab.</span>

<span class="sd">    sig