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| |
| <h1 id="Lucene_Net_Classification_KNearestNeighborClassifier" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier" class="text-break">Class KNearestNeighborClassifier |
| </h1> |
| <div class="markdown level0 summary"><p>A k-Nearest Neighbor classifier (see <pre><code>http://en.wikipedia.org/wiki/K-nearest_neighbors</code></pre>) based |
| on <span class="xref">Lucene.Net.Queries.Mlt.MoreLikeThis</span></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">KNearestNeighborClassifier</span></div> |
| </div> |
| <div classs="implements"> |
| <h5>Implements</h5> |
| <div><a class="xref" href="Lucene.Net.Classification.IClassifier-1.html">IClassifier</a><<a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Util.BytesRef.html">BytesRef</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> |
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| <span class="xref">System.Object.ReferenceEquals(System.Object, System.Object)</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.ToString()</span> |
| </div> |
| </div> |
| <h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Classification.html">Lucene.Net.Classification</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.Classification.dll</h6> |
| <h5 id="Lucene_Net_Classification_KNearestNeighborClassifier_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public class KNearestNeighborClassifier : IClassifier<BytesRef></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_Classification_KNearestNeighborClassifier__ctor_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Classification.KNearestNeighborClassifier.%23ctor(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> |
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| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Classification/KNearestNeighborClassifier.cs/#L49">View Source</a> |
| </span> |
| <a id="Lucene_Net_Classification_KNearestNeighborClassifier__ctor_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.#ctor*"></a> |
| <h4 id="Lucene_Net_Classification_KNearestNeighborClassifier__ctor_System_Int32_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.#ctor(System.Int32)">KNearestNeighborClassifier(Int32)</h4> |
| <div class="markdown level1 summary"><p>Create a <a class="xref" href="Lucene.Net.Classification.IClassifier-1.html">IClassifier<T></a> using kNN algorithm</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public KNearestNeighborClassifier(int k)</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">k</span></td> |
| <td><p>the number of neighbors to analyze as an <span class="xref">System.Int32</span></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_Classification_KNearestNeighborClassifier__ctor_System_Int32_System_Int32_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Classification.KNearestNeighborClassifier.%23ctor(System.Int32%2CSystem.Int32%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.Classification/KNearestNeighborClassifier.cs/#L58">View Source</a> |
| </span> |
| <a id="Lucene_Net_Classification_KNearestNeighborClassifier__ctor_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.#ctor*"></a> |
| <h4 id="Lucene_Net_Classification_KNearestNeighborClassifier__ctor_System_Int32_System_Int32_System_Int32_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.#ctor(System.Int32,System.Int32,System.Int32)">KNearestNeighborClassifier(Int32, Int32, Int32)</h4> |
| <div class="markdown level1 summary"><p>Create a <a class="xref" href="Lucene.Net.Classification.IClassifier-1.html">IClassifier<T></a> using kNN algorithm</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public KNearestNeighborClassifier(int k, int minDocsFreq, int minTermFreq)</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">k</span></td> |
| <td><p>the number of neighbors to analyze as an <span class="xref">System.Int32</span></p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">minDocsFreq</span></td> |
| <td><p>the minimum number of docs frequency for MLT to be set with <span class="xref">Lucene.Net.Queries.Mlt.MoreLikeThis.MinDocFreq</span></p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">minTermFreq</span></td> |
| <td><p>the minimum number of term frequency for MLT to be set with <span class="xref">Lucene.Net.Queries.Mlt.MoreLikeThis.MinTermFreq</span></p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <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_Classification_KNearestNeighborClassifier_AssignClass_System_String_.md&value=---%0Auid%3A%20Lucene.Net.Classification.KNearestNeighborClassifier.AssignClass(System.String)%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.Classification/KNearestNeighborClassifier.cs/#L70">View Source</a> |
| </span> |
| <a id="Lucene_Net_Classification_KNearestNeighborClassifier_AssignClass_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.AssignClass*"></a> |
| <h4 id="Lucene_Net_Classification_KNearestNeighborClassifier_AssignClass_System_String_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.AssignClass(System.String)">AssignClass(String)</h4> |
| <div class="markdown level1 summary"><p>Assign a class (with score) to the given text string</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual ClassificationResult<BytesRef> AssignClass(string text)</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.String</span></td> |
| <td><span class="parametername">text</span></td> |
| <td><p>a string containing text to be classified</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.Classification.ClassificationResult-1.html">ClassificationResult</a><<a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Util.BytesRef.html">BytesRef</a>></td> |
| <td><p>a <a class="xref" href="Lucene.Net.Classification.ClassificationResult-1.html">ClassificationResult<T></a> holding assigned class of type <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Util.BytesRef.html">BytesRef</a> and score</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_Classification_KNearestNeighborClassifier_Train_Lucene_Net_Index_AtomicReader_System_String_System_String_Lucene_Net_Analysis_Analyzer_.md&value=---%0Auid%3A%20Lucene.Net.Classification.KNearestNeighborClassifier.Train(Lucene.Net.Index.AtomicReader%2CSystem.String%2CSystem.String%2CLucene.Net.Analysis.Analyzer)%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 href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Classification/KNearestNeighborClassifier.cs/#L131">View Source</a> |
| </span> |
| <a id="Lucene_Net_Classification_KNearestNeighborClassifier_Train_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.Train*"></a> |
| <h4 id="Lucene_Net_Classification_KNearestNeighborClassifier_Train_Lucene_Net_Index_AtomicReader_System_String_System_String_Lucene_Net_Analysis_Analyzer_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.Train(Lucene.Net.Index.AtomicReader,System.String,System.String,Lucene.Net.Analysis.Analyzer)">Train(AtomicReader, String, String, Analyzer)</h4> |
| <div class="markdown level1 summary"><p>Train the classifier using the underlying Lucene index</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void Train(AtomicReader atomicReader, string textFieldName, string classFieldName, Analyzer analyzer)</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">Lucene.Net.Index.AtomicReader</span></td> |
| <td><span class="parametername">atomicReader</span></td> |
| <td><p>the reader to use to access the Lucene index</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td><span class="parametername">textFieldName</span></td> |
| <td><p>the name of the field used to compare documents</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td><span class="parametername">classFieldName</span></td> |
| <td><p>the name of the field containing the class assigned to documents</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.Analyzer</span></td> |
| <td><span class="parametername">analyzer</span></td> |
| <td><p>the analyzer used to tokenize / filter the unseen text</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_Classification_KNearestNeighborClassifier_Train_Lucene_Net_Index_AtomicReader_System_String_System_String_Lucene_Net_Analysis_Analyzer_Lucene_Net_Search_Query_.md&value=---%0Auid%3A%20Lucene.Net.Classification.KNearestNeighborClassifier.Train(Lucene.Net.Index.AtomicReader%2CSystem.String%2CSystem.String%2CLucene.Net.Analysis.Analyzer%2CLucene.Net.Search.Query)%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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| </span> |
| <a id="Lucene_Net_Classification_KNearestNeighborClassifier_Train_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.Train*"></a> |
| <h4 id="Lucene_Net_Classification_KNearestNeighborClassifier_Train_Lucene_Net_Index_AtomicReader_System_String_System_String_Lucene_Net_Analysis_Analyzer_Lucene_Net_Search_Query_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.Train(Lucene.Net.Index.AtomicReader,System.String,System.String,Lucene.Net.Analysis.Analyzer,Lucene.Net.Search.Query)">Train(AtomicReader, String, String, Analyzer, Query)</h4> |
| <div class="markdown level1 summary"><p>Train the classifier using the underlying Lucene index</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void Train(AtomicReader atomicReader, string textFieldName, string classFieldName, Analyzer analyzer, Query query)</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">Lucene.Net.Index.AtomicReader</span></td> |
| <td><span class="parametername">atomicReader</span></td> |
| <td><p>the reader to use to access the Lucene index</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td><span class="parametername">textFieldName</span></td> |
| <td><p>the name of the field used to compare documents</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td><span class="parametername">classFieldName</span></td> |
| <td><p>the name of the field containing the class assigned to documents</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.Analyzer</span></td> |
| <td><span class="parametername">analyzer</span></td> |
| <td><p>the analyzer used to tokenize / filter the unseen text</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Search.Query</span></td> |
| <td><span class="parametername">query</span></td> |
| <td><p>the query to filter which documents use for training</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
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| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Classification/KNearestNeighborClassifier.cs/#L153">View Source</a> |
| </span> |
| <a id="Lucene_Net_Classification_KNearestNeighborClassifier_Train_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.Train*"></a> |
| <h4 id="Lucene_Net_Classification_KNearestNeighborClassifier_Train_Lucene_Net_Index_AtomicReader_System_String___System_String_Lucene_Net_Analysis_Analyzer_Lucene_Net_Search_Query_" data-uid="Lucene.Net.Classification.KNearestNeighborClassifier.Train(Lucene.Net.Index.AtomicReader,System.String[],System.String,Lucene.Net.Analysis.Analyzer,Lucene.Net.Search.Query)">Train(AtomicReader, String[], String, Analyzer, Query)</h4> |
| <div class="markdown level1 summary"><p>Train the classifier using the underlying Lucene index</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void Train(AtomicReader atomicReader, string[] textFieldNames, string classFieldName, Analyzer analyzer, Query query)</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">Lucene.Net.Index.AtomicReader</span></td> |
| <td><span class="parametername">atomicReader</span></td> |
| <td><p>the reader to use to access the Lucene index</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.String</span>[]</td> |
| <td><span class="parametername">textFieldNames</span></td> |
| <td><p>the names of the fields to be used to compare documents</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td><span class="parametername">classFieldName</span></td> |
| <td><p>the name of the field containing the class assigned to documents</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.Analyzer</span></td> |
| <td><span class="parametername">analyzer</span></td> |
| <td><p>the analyzer used to tokenize / filter the unseen text</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Search.Query</span></td> |
| <td><span class="parametername">query</span></td> |
| <td><p>the query to filter which documents use for training</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="implements">Implements</h3> |
| <div> |
| <a class="xref" href="Lucene.Net.Classification.IClassifier-1.html">IClassifier<T></a> |
| </div> |
| </article> |
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