pan>
<a name="l00242"></a>00242   <span class="comment">// same as prob(i, tagger-&gt;y(i));</span>
<a name="l00243"></a>00243   <span class="keyword">virtual</span> <span class="keywordtype">double</span> prob(<span class="keywordtype">size_t</span> i) <span class="keyword">const</span> = 0;
<a name="l00244"></a>00244 
<a name="l00245"></a>00245   <span class="comment">// return conditional probability of enter output</span>
<a name="l00246"></a>00246   <span class="keyword">virtual</span> <span class="key