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<div class="subTitle">org.apache.mahout.math.neighborhood</div>
<h2 title="Class ProjectionSearch" class="title">Class ProjectionSearch</h2>
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<li><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html" title="class in org.apache.mahout.math.neighborhood">org.apache.mahout.math.neighborhood.Searcher</a></li>
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<li><a href="../../../../../org/apache/mahout/math/neighborhood/UpdatableSearcher.html" title="class in org.apache.mahout.math.neighborhood">org.apache.mahout.math.neighborhood.UpdatableSearcher</a></li>
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<li>org.apache.mahout.math.neighborhood.ProjectionSearch</li>
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<pre>public class <span class="typeNameLabel">ProjectionSearch</span>
extends <a href="../../../../../org/apache/mahout/math/neighborhood/UpdatableSearcher.html" title="class in org.apache.mahout.math.neighborhood">UpdatableSearcher</a></pre>
<div class="block">Does approximate nearest neighbor dudes search by projecting the data.</div>
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<code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#distanceMeasure">distanceMeasure</a></code></li>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#ProjectionSearch-org.apache.mahout.common.distance.DistanceMeasure-int-int-">ProjectionSearch</a></span>(<a href="../../../../../org/apache/mahout/common/distance/DistanceMeasure.html" title="interface in org.apache.mahout.common.distance">DistanceMeasure</a>&nbsp;distanceMeasure,
int&nbsp;numProjections,
int&nbsp;searchSize)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#add-org.apache.mahout.math.Vector-">add</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&nbsp;vector)</code>
<div class="block">Adds a WeightedVector into the set of projections for later searching.</div>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#clear--">clear</a></span>()</code>&nbsp;</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#iterator--">iterator</a></span>()</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#remove-org.apache.mahout.math.Vector-double-">remove</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&nbsp;vector,
double&nbsp;epsilon)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/random/WeightedThing.html?is-external=true" title="class or interface in org.apache.mahout.math.random">WeightedThing</a>&lt;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#search-org.apache.mahout.math.Vector-int-">search</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&nbsp;query,
int&nbsp;limit)</code>
<div class="block">Searches for the query vector returning the closest limit referenceVectors.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/random/WeightedThing.html?is-external=true" title="class or interface in org.apache.mahout.math.random">WeightedThing</a>&lt;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#searchFirst-org.apache.mahout.math.Vector-boolean-">searchFirst</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&nbsp;query,
boolean&nbsp;differentThanQuery)</code>
<div class="block">Returns the closest vector to the query.</div>
</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/neighborhood/ProjectionSearch.html#size--">size</a></span>()</code>
<div class="block">Returns the number of scalarProjections that we can search</div>
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<code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#addAll-java.lang.Iterable-">addAll</a>, <a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#addAllMatrixSlices-java.lang.Iterable-">addAllMatrixSlices</a>, <a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#addAllMatrixSlicesAsWeightedVectors-java.lang.Iterable-">addAllMatrixSlicesAsWeightedVectors</a>, <a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#getCandidateQueue-int-">getCandidateQueue</a>, <a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#getDistanceMeasure--">getDistanceMeasure</a>, <a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#search-java.lang.Iterable-int-">search</a>, <a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#searchFirst-java.lang.Iterable-boolean-">searchFirst</a></code></li>
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<h4>ProjectionSearch</h4>
<pre>public&nbsp;ProjectionSearch(<a href="../../../../../org/apache/mahout/common/distance/DistanceMeasure.html" title="interface in org.apache.mahout.common.distance">DistanceMeasure</a>&nbsp;distanceMeasure,
int&nbsp;numProjections,
int&nbsp;searchSize)</pre>
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<h4>add</h4>
<pre>public&nbsp;void&nbsp;add(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&nbsp;vector)</pre>
<div class="block">Adds a WeightedVector into the set of projections for later searching.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#add-org.apache.mahout.math.Vector-">add</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html" title="class in org.apache.mahout.math.neighborhood">Searcher</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>vector</code> - The WeightedVector to add.</dd>
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<h4>size</h4>
<pre>public&nbsp;int&nbsp;size()</pre>
<div class="block">Returns the number of scalarProjections that we can search</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#size--">size</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html" title="class in org.apache.mahout.math.neighborhood">Searcher</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of scalarProjections added to the search so far.</dd>
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<a name="search-org.apache.mahout.math.Vector-int-">
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<h4>search</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/random/WeightedThing.html?is-external=true" title="class or interface in org.apache.mahout.math.random">WeightedThing</a>&lt;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&gt;&gt;&nbsp;search(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&nbsp;query,
int&nbsp;limit)</pre>
<div class="block">Searches for the query vector returning the closest limit referenceVectors.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#search-org.apache.mahout.math.Vector-int-">search</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html" title="class in org.apache.mahout.math.neighborhood">Searcher</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>query</code> - the vector to search for.</dd>
<dd><code>limit</code> - the number of results to return.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a list of Vectors wrapped in WeightedThings where the "thing"'s weight is the
distance.</dd>
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<h4>searchFirst</h4>
<pre>public&nbsp;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/random/WeightedThing.html?is-external=true" title="class or interface in org.apache.mahout.math.random">WeightedThing</a>&lt;<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&gt;&nbsp;searchFirst(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a>&nbsp;query,
boolean&nbsp;differentThanQuery)</pre>
<div class="block">Returns the closest vector to the query.
When only one the nearest vector is needed, use this method, NOT search(query, limit) because
it's faster (less overhead).</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html#searchFirst-org.apache.mahout.math.Vector-boolean-">searchFirst</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/mahout/math/neighborhood/Searcher.html" title="class in org.apache.mahout.math.neighborhood">Searcher</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>query</code> - the vector to search for</dd>
<dd><code>differentThanQuery</code> - if true, returns the closest vector different than the query (this
only matters if the query is among the searched vectors), otherwise,
returns the closest vector to the query (even the same vector).</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the weighted vector closest to the query</dd>
</dl>
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