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<title>Class ScaleSingleFunction
| Apache Lucene.NET 4.8.0-beta00013 Documentation </title>
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<article class="content wrap" id="_content" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction">
<h1 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction" class="text-break">Class ScaleSingleFunction
</h1>
<div class="markdown level0 summary"><p>Scales values to be between <code>min</code> and <code>max</code>.
<p>This implementation currently traverses all of the source values to obtain
their min and max.
<p>This implementation currently cannot distinguish when documents have been
deleted or documents that have no value, and 0.0 values will be used for
these cases. This means that if values are normally all greater than 0.0, one can
still end up with 0.0 as the min value to map from. In these cases, an
appropriate map() function could be used as a workaround to change 0.0
to a value in the real range.
<p>
NOTE: This was ScaleFloatFunction in Lucene</p>
</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.Queries.Function.ValueSource.html">ValueSource</a></div>
<div class="level2"><span class="xref">ScaleSingleFunction</span></div>
</div>
<div class="inheritedMembers">
<h5>Inherited Members</h5>
<div>
<a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_ToString">ValueSource.ToString()</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_NewContext_Lucene_Net_Search_IndexSearcher_">ValueSource.NewContext(IndexSearcher)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_GetSortField_System_Boolean_">ValueSource.GetSortField(Boolean)</a>
</div>
<div>
<span class="xref">System.Object.Equals(System.Object, System.Object)</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.Queries.Function.ValueSources.html">Lucene.Net.Queries.Function.ValueSources</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.Queries.dll</h6>
<h5 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public class ScaleSingleFunction : ValueSource</code></pre>
</div>
<h3 id="constructors">Constructors
</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_Queries_Function_ValueSources_ScaleSingleFunction__ctor_Lucene_Net_Queries_Function_ValueSource_System_Single_System_Single_.md&amp;value=---%0Auid%3A%20Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.%23ctor(Lucene.Net.Queries.Function.ValueSource%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_Queries_Function_ValueSources_ScaleSingleFunction__ctor_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.#ctor*"></a>
<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction__ctor_Lucene_Net_Queries_Function_ValueSource_System_Single_System_Single_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.#ctor(Lucene.Net.Queries.Function.ValueSource,System.Single,System.Single)">ScaleSingleFunction(ValueSource, Single, Single)</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 ScaleSingleFunction(ValueSource source, float min, float max)</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.Queries.Function.ValueSource.html">ValueSource</a></td>
<td><span class="parametername">source</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">min</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">max</span></td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="fields">Fields
</h3>
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<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_m_max" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.m_max">m_max</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">protected readonly float m_max</code></pre>
</div>
<h5 class="fieldValue">Field 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>
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<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_m_min" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.m_min">m_min</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">protected readonly float m_min</code></pre>
</div>
<h5 class="fieldValue">Field 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>
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<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_m_source" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.m_source">m_source</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">protected readonly ValueSource m_source</code></pre>
</div>
<h5 class="fieldValue">Field Value</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.Queries.Function.ValueSource.html">ValueSource</a></td>
<td></td>
</tr>
</tbody>
</table>
<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_Queries_Function_ValueSources_ScaleSingleFunction_CreateWeight_System_Collections_IDictionary_Lucene_Net_Search_IndexSearcher_.md&amp;value=---%0Auid%3A%20Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.CreateWeight(System.Collections.IDictionary%2CLucene.Net.Search.IndexSearcher)%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_Queries_Function_ValueSources_ScaleSingleFunction_CreateWeight_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.CreateWeight*"></a>
<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_CreateWeight_System_Collections_IDictionary_Lucene_Net_Search_IndexSearcher_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.CreateWeight(System.Collections.IDictionary,Lucene.Net.Search.IndexSearcher)">CreateWeight(IDictionary, IndexSearcher)</h4>
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<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override void CreateWeight(IDictionary context, IndexSearcher searcher)</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.Collections.IDictionary</span></td>
<td><span class="parametername">context</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">Lucene.Net.Search.IndexSearcher</span></td>
<td><span class="parametername">searcher</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_CreateWeight_System_Collections_IDictionary_Lucene_Net_Search_IndexSearcher_">ValueSource.CreateWeight(IDictionary, IndexSearcher)</a></div>
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<a id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_Equals_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.Equals*"></a>
<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_Equals_System_Object_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.Equals(System.Object)">Equals(Object)</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 bool Equals(object o)</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.Object</span></td>
<td><span class="parametername">o</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.Boolean</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_Equals_System_Object_">ValueSource.Equals(Object)</a></div>
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<a id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_GetDescription_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.GetDescription*"></a>
<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_GetDescription" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.GetDescription">GetDescription()</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 GetDescription()</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><a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_GetDescription">ValueSource.GetDescription()</a></div>
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<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_GetHashCode" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.GetHashCode">GetHashCode()</h4>
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<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override int GetHashCode()</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.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_GetHashCode">ValueSource.GetHashCode()</a></div>
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<a id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_GetValues_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.GetValues*"></a>
<h4 id="Lucene_Net_Queries_Function_ValueSources_ScaleSingleFunction_GetValues_System_Collections_IDictionary_Lucene_Net_Index_AtomicReaderContext_" data-uid="Lucene.Net.Queries.Function.ValueSources.ScaleSingleFunction.GetValues(System.Collections.IDictionary,Lucene.Net.Index.AtomicReaderContext)">GetValues(IDictionary, 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 FunctionValues GetValues(IDictionary context, AtomicReaderContext readerContext)</code></pre>
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<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.Collections.IDictionary</span></td>
<td><span class="parametername">context</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">Lucene.Net.Index.AtomicReaderContext</span></td>
<td><span class="parametername">readerContext</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.Queries.Function.FunctionValues.html">FunctionValues</a></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Queries.Function.ValueSource.html#Lucene_Net_Queries_Function_ValueSource_GetValues_System_Collections_IDictionary_Lucene_Net_Index_AtomicReaderContext_">ValueSource.GetValues(IDictionary, AtomicReaderContext)</a></div>
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