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| <article class="content wrap" id="_content" data-uid="Lucene.Net.Search.Similarities.BM25Similarity"> |
| |
| |
| <h1 id="Lucene_Net_Search_Similarities_BM25Similarity" data-uid="Lucene.Net.Search.Similarities.BM25Similarity" class="text-break">Class BM25Similarity |
| </h1> |
| <div class="markdown level0 summary"><p>BM25 Similarity. Introduced in Stephen E. Robertson, Steve Walker, |
| Susan Jones, Micheline Hancock-Beaulieu, and Mike Gatford. Okapi at TREC-3. |
| In Proceedings of the Third <strong>T</strong>ext <strong>RE</strong>trieval <strong>C</strong>onference (TREC 1994). |
| Gaithersburg, USA, November 1994. |
| <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"><a class="xref" href="Lucene.Net.Search.Similarities.Similarity.html">Similarity</a></div> |
| <div class="level2"><span class="xref">BM25Similarity</span></div> |
| </div> |
| <div class="inheritedMembers"> |
| <h5>Inherited Members</h5> |
| <div> |
| <a class="xref" href="Lucene.Net.Search.Similarities.Similarity.html#Lucene_Net_Search_Similarities_Similarity_Coord_System_Int32_System_Int32_">Similarity.Coord(Int32, Int32)</a> |
| </div> |
| <div> |
| <a class="xref" href="Lucene.Net.Search.Similarities.Similarity.html#Lucene_Net_Search_Similarities_Similarity_QueryNorm_System_Single_">Similarity.QueryNorm(Single)</a> |
| </div> |
| <div> |
| <span class="xref">System.Object.Equals(System.Object)</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.Equals(System.Object, System.Object)</span> |
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| <span class="xref">System.Object.GetHashCode()</span> |
| </div> |
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| <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_BM25Similarity_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public class BM25Similarity : Similarity</code></pre> |
| </div> |
| <h3 id="constructors">Constructors |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity__ctor.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.%23ctor%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L59">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity__ctor_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.#ctor*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity__ctor" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.#ctor">BM25Similarity()</h4> |
| <div class="markdown level1 summary"><p>BM25 with these default values: |
| <ul><li><code>k1 = 1.2</code>,</li><li><code>b = 0.75</code>.</li></ul></p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public BM25Similarity()</code></pre> |
| </div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity__ctor_System_Single_System_Single_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.%23ctor(System.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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L46">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity__ctor_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.#ctor*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity__ctor_System_Single_System_Single_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.#ctor(System.Single,System.Single)">BM25Similarity(Single, Single)</h4> |
| <div class="markdown level1 summary"><p>BM25 with the supplied parameter values. </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public BM25Similarity(float k1, float b)</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><span class="xref">System.Single</span></td> |
| <td><span class="parametername">k1</span></td> |
| <td><p>Controls non-linear term frequency normalization (saturation). </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Single</span></td> |
| <td><span class="parametername">b</span></td> |
| <td><p>Controls to what degree document length normalizes tf values. </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="properties">Properties |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_B.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.B%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L386">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_B_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.B*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_B" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.B">B</h4> |
| <div class="markdown level1 summary"><p>Returns the <code>b</code> parameter </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual float B { get; }</code></pre> |
| </div> |
| <h5 class="propertyValue">Property Value</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> |
| <h5 id="Lucene_Net_Search_Similarities_BM25Similarity_B_seealso">See Also</h5> |
| <div class="seealso"> |
| <div><a class="xref" href="Lucene.Net.Search.Similarities.BM25Similarity.html#Lucene_Net_Search_Similarities_BM25Similarity__ctor_System_Single_System_Single_">BM25Similarity(Single, Single)</a></div> |
| </div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_DiscountOverlaps.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.DiscountOverlaps%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L135">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_DiscountOverlaps_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.DiscountOverlaps*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_DiscountOverlaps" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.DiscountOverlaps">DiscountOverlaps</h4> |
| <div class="markdown level1 summary"><p>Gets or Sets whether overlap tokens (Tokens with 0 position increment) are |
| ignored when computing norm. By default this is true, meaning overlap |
| tokens do not count when computing norms.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual bool DiscountOverlaps { get; set; }</code></pre> |
| </div> |
| <h5 class="propertyValue">Property Value</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.Boolean</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_K1.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.K1%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L381">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_K1_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.K1*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_K1" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.K1">K1</h4> |
| <div class="markdown level1 summary"><p>Returns the <code>k1</code> parameter </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual float K1 { get; }</code></pre> |
| </div> |
| <h5 class="propertyValue">Property Value</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> |
| <h5 id="Lucene_Net_Search_Similarities_BM25Similarity_K1_seealso">See Also</h5> |
| <div class="seealso"> |
| <div><a class="xref" href="Lucene.Net.Search.Similarities.BM25Similarity.html#Lucene_Net_Search_Similarities_BM25Similarity__ctor_System_Single_System_Single_">BM25Similarity(Single, Single)</a></div> |
| </div> |
| <h3 id="methods">Methods |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_AvgFieldLength_Lucene_Net_Search_CollectionStatistics_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.AvgFieldLength(Lucene.Net.Search.CollectionStatistics)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L91">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_AvgFieldLength_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.AvgFieldLength*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_AvgFieldLength_Lucene_Net_Search_CollectionStatistics_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.AvgFieldLength(Lucene.Net.Search.CollectionStatistics)">AvgFieldLength(CollectionStatistics)</h4> |
| <div class="markdown level1 summary"><p>The default implementation computes the average as <code>sumTotalTermFreq / maxDoc</code>, |
| or returns <code>1</code> if the index does not store sumTotalTermFreq (Lucene 3.x indexes |
| or any field that omits frequency information).</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">protected virtual float AvgFieldLength(CollectionStatistics collectionStats)</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.CollectionStatistics.html">CollectionStatistics</a></td> |
| <td><span class="parametername">collectionStats</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> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_ComputeNorm_Lucene_Net_Index_FieldInvertState_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.ComputeNorm(Lucene.Net.Index.FieldInvertState)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L156">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_ComputeNorm_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ComputeNorm*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_ComputeNorm_Lucene_Net_Index_FieldInvertState_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ComputeNorm(Lucene.Net.Index.FieldInvertState)">ComputeNorm(FieldInvertState)</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override sealed long ComputeNorm(FieldInvertState state)</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.Index.FieldInvertState.html">FieldInvertState</a></td> |
| <td><span class="parametername">state</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.Int64</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="Lucene.Net.Search.Similarities.Similarity.html#Lucene_Net_Search_Similarities_Similarity_ComputeNorm_Lucene_Net_Index_FieldInvertState_">Similarity.ComputeNorm(FieldInvertState)</a></div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_ComputeWeight_System_Single_Lucene_Net_Search_CollectionStatistics_Lucene_Net_Search_TermStatistics___.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.ComputeWeight(System.Single%2CLucene.Net.Search.CollectionStatistics%2CLucene.Net.Search.TermStatistics%5B%5D)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L220">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_ComputeWeight_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ComputeWeight*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_ComputeWeight_System_Single_Lucene_Net_Search_CollectionStatistics_Lucene_Net_Search_TermStatistics___" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ComputeWeight(System.Single,Lucene.Net.Search.CollectionStatistics,Lucene.Net.Search.TermStatistics[])">ComputeWeight(Single, CollectionStatistics, TermStatistics[])</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override sealed Similarity.SimWeight ComputeWeight(float queryBoost, CollectionStatistics collectionStats, params TermStatistics[] termStats)</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><span class="xref">System.Single</span></td> |
| <td><span class="parametername">queryBoost</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Search.CollectionStatistics.html">CollectionStatistics</a></td> |
| <td><span class="parametername">collectionStats</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Search.TermStatistics.html">TermStatistics</a>[]</td> |
| <td><span class="parametername">termStats</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.Similarities.Similarity.SimWeight.html">Similarity.SimWeight</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="Lucene.Net.Search.Similarities.Similarity.html#Lucene_Net_Search_Similarities_Similarity_ComputeWeight_System_Single_Lucene_Net_Search_CollectionStatistics_Lucene_Net_Search_TermStatistics___">Similarity.ComputeWeight(Single, CollectionStatistics, TermStatistics[])</a></div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_DecodeNormValue_System_Byte_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.DecodeNormValue(System.Byte)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L119">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_DecodeNormValue_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.DecodeNormValue*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_DecodeNormValue_System_Byte_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.DecodeNormValue(System.Byte)">DecodeNormValue(Byte)</h4> |
| <div class="markdown level1 summary"><p>The default implementation returns <code>1 / f<sup>2</sup></code> |
| where <code>f</code> is <a class="xref" href="Lucene.Net.Util.SmallSingle.html#Lucene_Net_Util_SmallSingle_Byte315ToSingle_System_Byte_">Byte315ToSingle(Byte)</a>.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">protected virtual float DecodeNormValue(byte b)</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><span class="xref">System.Byte</span></td> |
| <td><span class="parametername">b</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> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_EncodeNormValue_System_Single_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.EncodeNormValue(System.Single%2CSystem.Int32)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L110">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_EncodeNormValue_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.EncodeNormValue*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_EncodeNormValue_System_Single_System_Int32_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.EncodeNormValue(System.Single,System.Int32)">EncodeNormValue(Single, Int32)</h4> |
| <div class="markdown level1 summary"><p>The default implementation encodes <code>boost / sqrt(length)</code> |
| with <a class="xref" href="Lucene.Net.Util.SmallSingle.html#Lucene_Net_Util_SmallSingle_SingleToByte315_System_Single_">SingleToByte315(Single)</a>. This is compatible with |
| Lucene's default implementation. If you change this, then you should |
| change <a class="xref" href="Lucene.Net.Search.Similarities.BM25Similarity.html#Lucene_Net_Search_Similarities_BM25Similarity_DecodeNormValue_System_Byte_">DecodeNormValue(Byte)</a> to match.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">protected virtual byte EncodeNormValue(float boost, int fieldLength)</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><span class="xref">System.Single</span></td> |
| <td><span class="parametername">boost</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">fieldLength</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.Byte</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_GetSimScorer_Lucene_Net_Search_Similarities_Similarity_SimWeight_Lucene_Net_Index_AtomicReaderContext_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.GetSimScorer(Lucene.Net.Search.Similarities.Similarity.SimWeight%2CLucene.Net.Index.AtomicReaderContext)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L235">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_GetSimScorer_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.GetSimScorer*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_GetSimScorer_Lucene_Net_Search_Similarities_Similarity_SimWeight_Lucene_Net_Index_AtomicReaderContext_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.GetSimScorer(Lucene.Net.Search.Similarities.Similarity.SimWeight,Lucene.Net.Index.AtomicReaderContext)">GetSimScorer(Similarity.SimWeight, AtomicReaderContext)</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override sealed Similarity.SimScorer GetSimScorer(Similarity.SimWeight stats, AtomicReaderContext context)</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.Similarity.SimWeight.html">Similarity.SimWeight</a></td> |
| <td><span class="parametername">stats</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Index.AtomicReaderContext.html">AtomicReaderContext</a></td> |
| <td><span class="parametername">context</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.Similarities.Similarity.SimScorer.html">Similarity.SimScorer</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="Lucene.Net.Search.Similarities.Similarity.html#Lucene_Net_Search_Similarities_Similarity_GetSimScorer_Lucene_Net_Search_Similarities_Similarity_SimWeight_Lucene_Net_Index_AtomicReaderContext_">Similarity.GetSimScorer(Similarity.SimWeight, AtomicReaderContext)</a></div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_Idf_System_Int64_System_Int64_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.Idf(System.Int64%2CSystem.Int64)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L67">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_Idf_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.Idf*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_Idf_System_Int64_System_Int64_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.Idf(System.Int64,System.Int64)">Idf(Int64, Int64)</h4> |
| <div class="markdown level1 summary"><p>Implemented as <code>log(1 + (numDocs - docFreq + 0.5)/(docFreq + 0.5))</code>. </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">protected virtual float Idf(long docFreq, long numDocs)</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><span class="xref">System.Int64</span></td> |
| <td><span class="parametername">docFreq</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int64</span></td> |
| <td><span class="parametername">numDocs</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> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_IdfExplain_Lucene_Net_Search_CollectionStatistics_Lucene_Net_Search_TermStatistics_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.IdfExplain(Lucene.Net.Search.CollectionStatistics%2CLucene.Net.Search.TermStatistics)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L183">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_IdfExplain_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.IdfExplain*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_IdfExplain_Lucene_Net_Search_CollectionStatistics_Lucene_Net_Search_TermStatistics_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.IdfExplain(Lucene.Net.Search.CollectionStatistics,Lucene.Net.Search.TermStatistics)">IdfExplain(CollectionStatistics, TermStatistics)</h4> |
| <div class="markdown level1 summary"><p>Computes a score factor for a simple term and returns an explanation |
| for that score factor.</p> |
| <p><p> |
| The default implementation uses:</p> |
| <pre><code> Idf(docFreq, searcher.MaxDoc);</code></pre> |
| |
| <p>Note that <a class="xref" href="Lucene.Net.Search.CollectionStatistics.html#Lucene_Net_Search_CollectionStatistics_MaxDoc">MaxDoc</a> is used instead of |
| <a class="xref" href="Lucene.Net.Index.IndexReader.html#Lucene_Net_Index_IndexReader_NumDocs">NumDocs</a> because also |
| <a class="xref" href="Lucene.Net.Search.TermStatistics.html#Lucene_Net_Search_TermStatistics_DocFreq">DocFreq</a> is used, and when the latter |
| is inaccurate, so is <a class="xref" href="Lucene.Net.Search.CollectionStatistics.html#Lucene_Net_Search_CollectionStatistics_MaxDoc">MaxDoc</a>, and in the same direction. |
| In addition, <a class="xref" href="Lucene.Net.Search.CollectionStatistics.html#Lucene_Net_Search_CollectionStatistics_MaxDoc">MaxDoc</a> is more efficient to compute</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 IdfExplain(CollectionStatistics collectionStats, TermStatistics termStats)</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.CollectionStatistics.html">CollectionStatistics</a></td> |
| <td><span class="parametername">collectionStats</span></td> |
| <td><p>collection-level statistics </p> |
| </td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Search.TermStatistics.html">TermStatistics</a></td> |
| <td><span class="parametername">termStats</span></td> |
| <td><p>term-level statistics for the term </p> |
| </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><p>an <a class="xref" href="Lucene.Net.Search.Explanation.html">Explanation</a> object that includes both an idf score factor |
| and an explanation for the term. </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_IdfExplain_Lucene_Net_Search_CollectionStatistics_Lucene_Net_Search_TermStatistics___.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.IdfExplain(Lucene.Net.Search.CollectionStatistics%2CLucene.Net.Search.TermStatistics%5B%5D)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L203">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_IdfExplain_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.IdfExplain*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_IdfExplain_Lucene_Net_Search_CollectionStatistics_Lucene_Net_Search_TermStatistics___" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.IdfExplain(Lucene.Net.Search.CollectionStatistics,Lucene.Net.Search.TermStatistics[])">IdfExplain(CollectionStatistics, TermStatistics[])</h4> |
| <div class="markdown level1 summary"><p>Computes a score factor for a phrase.</p> |
| <p><p> |
| The default implementation sums the idf factor for |
| each term in the phrase.</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 IdfExplain(CollectionStatistics collectionStats, TermStatistics[] termStats)</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.CollectionStatistics.html">CollectionStatistics</a></td> |
| <td><span class="parametername">collectionStats</span></td> |
| <td><p>collection-level statistics </p> |
| </td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Search.TermStatistics.html">TermStatistics</a>[]</td> |
| <td><span class="parametername">termStats</span></td> |
| <td><p>term-level statistics for the terms in the phrase </p> |
| </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><p>an <a class="xref" href="Lucene.Net.Search.Explanation.html">Explanation</a> object that includes both an idf |
| score factor for the phrase and an explanation |
| for each term. </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_ScorePayload_System_Int32_System_Int32_System_Int32_Lucene_Net_Util_BytesRef_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.ScorePayload(System.Int32%2CSystem.Int32%2CSystem.Int32%2CLucene.Net.Util.BytesRef)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L81">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_ScorePayload_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ScorePayload*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_ScorePayload_System_Int32_System_Int32_System_Int32_Lucene_Net_Util_BytesRef_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ScorePayload(System.Int32,System.Int32,System.Int32,Lucene.Net.Util.BytesRef)">ScorePayload(Int32, Int32, Int32, BytesRef)</h4> |
| <div class="markdown level1 summary"><p>The default implementation returns <code>1</code> </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">protected virtual float ScorePayload(int doc, int start, int end, BytesRef payload)</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><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">doc</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">start</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">end</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Util.BytesRef.html">BytesRef</a></td> |
| <td><span class="parametername">payload</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> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_SloppyFreq_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.SloppyFreq(System.Int32)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L74">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_SloppyFreq_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.SloppyFreq*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_SloppyFreq_System_Int32_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.SloppyFreq(System.Int32)">SloppyFreq(Int32)</h4> |
| <div class="markdown level1 summary"><p>Implemented as <code>1 / (distance + 1)</code>. </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">protected virtual float SloppyFreq(int distance)</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><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">distance</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> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity_ToString.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity.ToString%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L373">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_Similarities_BM25Similarity_ToString_" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ToString*"></a> |
| <h4 id="Lucene_Net_Search_Similarities_BM25Similarity_ToString" data-uid="Lucene.Net.Search.Similarities.BM25Similarity.ToString">ToString()</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public 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> |
| </article> |
| </div> |
| |
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| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_Similarities_BM25Similarity.md&value=---%0Auid%3A%20Lucene.Net.Search.Similarities.BM25Similarity%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" class="contribution-link">Improve this Doc</a> |
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| <a href="https://github.com/apache/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net/Search/Similarities/BM25Similarity.cs/#L36" class="contribution-link">View Source</a> |
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