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<h1 title="Package" class="title">Package&nbsp;org.apache.mahout.cf.taste.impl.recommender</h1>
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<table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Interface Summary table, listing interfaces, and an explanation">
<caption><span>Interface Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/TopItems.Estimator.html" title="interface in org.apache.mahout.cf.taste.impl.recommender">TopItems.Estimator</a>&lt;T&gt;</td>
<td class="colLast">&nbsp;</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList">
<table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Class Summary table, listing classes, and an explanation">
<caption><span>Class Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/AbstractCandidateItemsStrategy.html" title="class in org.apache.mahout.cf.taste.impl.recommender">AbstractCandidateItemsStrategy</a></td>
<td class="colLast">
<div class="block">Abstract base implementation for retrieving candidate items to recommend</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/AbstractRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">AbstractRecommender</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/AllSimilarItemsCandidateItemsStrategy.html" title="class in org.apache.mahout.cf.taste.impl.recommender">AllSimilarItemsCandidateItemsStrategy</a></td>
<td class="colLast">
<div class="block">returns the result of <a href="../../../../../../../org/apache/mahout/cf/taste/similarity/ItemSimilarity.html#allSimilarItemIDs-long-"><code>ItemSimilarity.allSimilarItemIDs(long)</code></a> as candidate items</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/AllUnknownItemsCandidateItemsStrategy.html" title="class in org.apache.mahout.cf.taste.impl.recommender">AllUnknownItemsCandidateItemsStrategy</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/ByValueRecommendedItemComparator.html" title="class in org.apache.mahout.cf.taste.impl.recommender">ByValueRecommendedItemComparator</a></td>
<td class="colLast">
<div class="block">Defines a natural ordering from most-preferred item (highest value) to least-preferred.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/CachingRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">CachingRecommender</a></td>
<td class="colLast">
<div class="block">
A <a href="../../../../../../../org/apache/mahout/cf/taste/recommender/Recommender.html" title="interface in org.apache.mahout.cf.taste.recommender"><code>Recommender</code></a> which caches the results from another <a href="../../../../../../../org/apache/mahout/cf/taste/recommender/Recommender.html" title="interface in org.apache.mahout.cf.taste.recommender"><code>Recommender</code></a> in memory.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/EstimatedPreferenceCapper.html" title="class in org.apache.mahout.cf.taste.impl.recommender">EstimatedPreferenceCapper</a></td>
<td class="colLast">
<div class="block">Simple class which encapsulates restricting a preference value
to a predefined range.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericBooleanPrefItemBasedRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">GenericBooleanPrefItemBasedRecommender</a></td>
<td class="colLast">
<div class="block">A variant on <a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericItemBasedRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender"><code>GenericItemBasedRecommender</code></a> which is appropriate for use when no notion of preference
value exists in the data.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericBooleanPrefUserBasedRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">GenericBooleanPrefUserBasedRecommender</a></td>
<td class="colLast">
<div class="block">A variant on <a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericUserBasedRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender"><code>GenericUserBasedRecommender</code></a> which is appropriate for use when no notion of preference
value exists in the data.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericItemBasedRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">GenericItemBasedRecommender</a></td>
<td class="colLast">
<div class="block">
A simple <a href="../../../../../../../org/apache/mahout/cf/taste/recommender/Recommender.html" title="interface in org.apache.mahout.cf.taste.recommender"><code>Recommender</code></a> which uses a given
<a href="../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model"><code>DataModel</code></a> and
<a href="../../../../../../../org/apache/mahout/cf/taste/similarity/ItemSimilarity.html" title="interface in org.apache.mahout.cf.taste.similarity"><code>ItemSimilarity</code></a> to produce recommendations.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericItemBasedRecommender.MostSimilarEstimator.html" title="class in org.apache.mahout.cf.taste.impl.recommender">GenericItemBasedRecommender.MostSimilarEstimator</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericRecommendedItem.html" title="class in org.apache.mahout.cf.taste.impl.recommender">GenericRecommendedItem</a></td>
<td class="colLast">
<div class="block">
A simple implementation of <a href="../../../../../../../org/apache/mahout/cf/taste/recommender/RecommendedItem.html" title="interface in org.apache.mahout.cf.taste.recommender"><code>RecommendedItem</code></a>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/GenericUserBasedRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">GenericUserBasedRecommender</a></td>
<td class="colLast">
<div class="block">
A simple <a href="../../../../../../../org/apache/mahout/cf/taste/recommender/Recommender.html" title="interface in org.apache.mahout.cf.taste.recommender"><code>Recommender</code></a>
which uses a given <a href="../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model"><code>DataModel</code></a> and <a href="../../../../../../../org/apache/mahout/cf/taste/neighborhood/UserNeighborhood.html" title="interface in org.apache.mahout.cf.taste.neighborhood"><code>UserNeighborhood</code></a> to produce recommendations.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/ItemAverageRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">ItemAverageRecommender</a></td>
<td class="colLast">
<div class="block">
A simple recommender that always estimates preference for an item to be the average of all known preference
values for that item.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/ItemUserAverageRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">ItemUserAverageRecommender</a></td>
<td class="colLast">
<div class="block">
Like <a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/ItemAverageRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender"><code>ItemAverageRecommender</code></a>, except that estimated preferences are adjusted for the users' average
preference value.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/NullRescorer.html" title="class in org.apache.mahout.cf.taste.impl.recommender">NullRescorer</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">
A simple <a href="../../../../../../../org/apache/mahout/cf/taste/recommender/Rescorer.html" title="interface in org.apache.mahout.cf.taste.recommender"><code>Rescorer</code></a> which always returns the original score.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/PreferredItemsNeighborhoodCandidateItemsStrategy.html" title="class in org.apache.mahout.cf.taste.impl.recommender">PreferredItemsNeighborhoodCandidateItemsStrategy</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/RandomRecommender.html" title="class in org.apache.mahout.cf.taste.impl.recommender">RandomRecommender</a></td>
<td class="colLast">
<div class="block">Produces random recommendations and preference estimates.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/SamplingCandidateItemsStrategy.html" title="class in org.apache.mahout.cf.taste.impl.recommender">SamplingCandidateItemsStrategy</a></td>
<td class="colLast">
<div class="block">Returns all items that have not been rated by the user <em>(3)</em> and that were preferred by another user
<em>(2)</em> that has preferred at least one item <em>(1)</em> that the current user has preferred too.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/SimilarUser.html" title="class in org.apache.mahout.cf.taste.impl.recommender">SimilarUser</a></td>
<td class="colLast">
<div class="block">Simply encapsulates a user and a similarity value.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/TopItems.html" title="class in org.apache.mahout.cf.taste.impl.recommender">TopItems</a></td>
<td class="colLast">
<div class="block">
A simple class that refactors the "find top N things" logic that is used in several places.</div>
</td>
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