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<article class="content wrap" id="_content" data-uid="Lucene.Net.Search.Similarities.Distribution">
<h1 id="Lucene_Net_Search_Similarities_Distribution" data-uid="Lucene.Net.Search.Similarities.Distribution" class="text-break">Class Distribution
</h1>
<div class="markdown level0 summary"><p>The probabilistic distribution used to model term occurrence
in information-based models.
<p>
<div class="lucene-block lucene-experimental">This is a Lucene.NET EXPERIMENTAL API, use at your own risk</div></div>
<div class="markdown level0 conceptual"></div>
<div class="inheritance">
<h5>Inheritance</h5>
<div class="level0"><span class="xref">System.Object</span></div>
<div class="level1"><span class="xref">Distribution</span></div>
<div class="level2"><a class="xref" href="Lucene.Net.Search.Similarities.DistributionLL.html">DistributionLL</a></div>
<div class="level2"><a class="xref" href="Lucene.Net.Search.Similarities.DistributionSPL.html">DistributionSPL</a></div>
</div>
<div class="inheritedMembers">
<h5>Inherited Members</h5>
<div>
<span class="xref">System.Object.Equals(System.Object)</span>
</div>
<div>
<span class="xref">System.Object.Equals(System.Object, System.Object)</span>
</div>
<div>
<span class="xref">System.Object.GetHashCode()</span>
</div>
<div>
<span class="xref">System.Object.GetType()</span>
</div>
<div>
<span class="xref">System.Object.MemberwiseClone()</span>
</div>
<div>
<span class="xref">System.Object.ReferenceEquals(System.Object, System.Object)</span>
</div>
</div>
<h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Search.Similarities.html">Lucene.Net.Search.Similarities</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.dll</h6>
<h5 id="Lucene_Net_Search_Similarities_Distribution_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public abstract class Distribution</code></pre>
</div>
<h3 id="constructors">Constructors
</h3>
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<a id="Lucene_Net_Search_Similarities_Distribution__ctor_" data-uid="Lucene.Net.Search.Similarities.Distribution.#ctor*"></a>
<h4 id="Lucene_Net_Search_Similarities_Distribution__ctor" data-uid="Lucene.Net.Search.Similarities.Distribution.#ctor">Distribution()</h4>
<div class="markdown level1 summary"><p>Sole constructor. (For invocation by subclass
constructors, typically implicit.)</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected Distribution()</code></pre>
</div>
<h3 id="methods">Methods
</h3>
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<a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00013/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_Distribution_Explain_Lucene_Net_Search_Similarities_BasicStats_System_Single_System_Single_.md&amp;value=---%0Auid%3A%20Lucene.Net.Search.Similarities.Distribution.Explain(Lucene.Net.Search.Similarities.BasicStats%2CSystem.Single%2CSystem.Single)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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<a id="Lucene_Net_Search_Similarities_Distribution_Explain_" data-uid="Lucene.Net.Search.Similarities.Distribution.Explain*"></a>
<h4 id="Lucene_Net_Search_Similarities_Distribution_Explain_Lucene_Net_Search_Similarities_BasicStats_System_Single_System_Single_" data-uid="Lucene.Net.Search.Similarities.Distribution.Explain(Lucene.Net.Search.Similarities.BasicStats,System.Single,System.Single)">Explain(BasicStats, Single, Single)</h4>
<div class="markdown level1 summary"><p>Explains the score. Returns the name of the model only, since
both <code>tfn</code> and <code>lambda</code> are explained elsewhere.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual Explanation Explain(BasicStats stats, float tfn, float lambda)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Search.Similarities.BasicStats.html">BasicStats</a></td>
<td><span class="parametername">stats</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">tfn</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">lambda</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Search.Explanation.html">Explanation</a></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Search_Similarities_Distribution_Score_" data-uid="Lucene.Net.Search.Similarities.Distribution.Score*"></a>
<h4 id="Lucene_Net_Search_Similarities_Distribution_Score_Lucene_Net_Search_Similarities_BasicStats_System_Single_System_Single_" data-uid="Lucene.Net.Search.Similarities.Distribution.Score(Lucene.Net.Search.Similarities.BasicStats,System.Single,System.Single)">Score(BasicStats, Single, Single)</h4>
<div class="markdown level1 summary"><p>Computes the score. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public abstract float Score(BasicStats stats, float tfn, float lambda)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Search.Similarities.BasicStats.html">BasicStats</a></td>
<td><span class="parametername">stats</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">tfn</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">lambda</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Single</span></td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Search_Similarities_Distribution_ToString" data-uid="Lucene.Net.Search.Similarities.Distribution.ToString">ToString()</h4>
<div class="markdown level1 summary"><p>Subclasses must override this method to return the name of the
distribution.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public abstract override string ToString()</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><span class="xref">System.Object.ToString()</span></div>
<h3 id="seealso">See Also</h3>
<div class="seealso">
<div><a class="xref" href="Lucene.Net.Search.Similarities.IBSimilarity.html">IBSimilarity</a></div>
</div>
</article>
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