| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <!-- NewPage --> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (1.8.0_121) on Fri Apr 14 22:11:37 PDT 2017 --> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <title>org.apache.mahout.cf.taste.impl.similarity (Mahout Map-Reduce 0.13.0 API)</title> |
| <meta name="date" content="2017-04-14"> |
| <link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style"> |
| <script type="text/javascript" src="../../../../../../../script.js"></script> |
| </head> |
| <body> |
| <script type="text/javascript"><!-- |
| try { |
| if (location.href.indexOf('is-external=true') == -1) { |
| parent.document.title="org.apache.mahout.cf.taste.impl.similarity (Mahout Map-Reduce 0.13.0 API)"; |
| } |
| } |
| catch(err) { |
| } |
| //--> |
| </script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="topNav"><a name="navbar.top"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.top.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../../../overview-summary.html">Overview</a></li> |
| <li class="navBarCell1Rev">Package</li> |
| <li>Class</li> |
| <li><a href="package-use.html">Use</a></li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../../../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/package-summary.html">Prev Package</a></li> |
| <li><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/file/package-summary.html">Next Package</a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../../../../index.html?org/apache/mahout/cf/taste/impl/similarity/package-summary.html" target="_top">Frames</a></li> |
| <li><a href="package-summary.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_top"> |
| <li><a href="../../../../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_top"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <a name="skip.navbar.top"> |
| <!-- --> |
| </a></div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| <div class="header"> |
| <h1 title="Package" class="title">Package org.apache.mahout.cf.taste.impl.similarity</h1> |
| </div> |
| <div class="contentContainer"> |
| <ul class="blockList"> |
| <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"> </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/similarity/AbstractItemSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">AbstractItemSimilarity</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/AveragingPreferenceInferrer.html" title="class in org.apache.mahout.cf.taste.impl.similarity">AveragingPreferenceInferrer</a></td> |
| <td class="colLast"> |
| <div class="block"> |
| Implementations of this interface compute an inferred preference for a user and an item that the user has |
| not expressed any preference for.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/CachingItemSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">CachingItemSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block">Caches the results from an underlying <a href="../../../../../../../org/apache/mahout/cf/taste/similarity/ItemSimilarity.html" title="interface in org.apache.mahout.cf.taste.similarity"><code>ItemSimilarity</code></a> implementation.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/CachingUserSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">CachingUserSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block">Caches the results from an underlying <a href="../../../../../../../org/apache/mahout/cf/taste/similarity/UserSimilarity.html" title="interface in org.apache.mahout.cf.taste.similarity"><code>UserSimilarity</code></a> implementation.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/CityBlockSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">CityBlockSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block">Implementation of City Block distance (also known as Manhattan distance) - the absolute value of the difference of |
| each direction is summed.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/EuclideanDistanceSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">EuclideanDistanceSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block"> |
| An implementation of a "similarity" based on the Euclidean "distance" between two users X and Y.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/GenericItemSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">GenericItemSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block"> |
| A "generic" <a href="../../../../../../../org/apache/mahout/cf/taste/similarity/ItemSimilarity.html" title="interface in org.apache.mahout.cf.taste.similarity"><code>ItemSimilarity</code></a> which takes a static list of precomputed item similarities and bases its |
| responses on that alone.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/GenericItemSimilarity.ItemItemSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">GenericItemSimilarity.ItemItemSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block">Encapsulates a similarity between two items.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/GenericUserSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">GenericUserSimilarity</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/GenericUserSimilarity.UserUserSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">GenericUserSimilarity.UserUserSimilarity</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/LogLikelihoodSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">LogLikelihoodSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block">See <a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.14.5962"> |
| http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.14.5962</a> and |
| <a href="http://tdunning.blogspot.com/2008/03/surprise-and-coincidence.html"> |
| http://tdunning.blogspot.com/2008/03/surprise-and-coincidence.html</a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/PearsonCorrelationSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">PearsonCorrelationSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block"> |
| An implementation of the Pearson correlation.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/SpearmanCorrelationSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">SpearmanCorrelationSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block"> |
| Like <a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/PearsonCorrelationSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity"><code>PearsonCorrelationSimilarity</code></a>, but compares relative ranking of preference values instead of |
| preference values themselves.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/TanimotoCoefficientSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">TanimotoCoefficientSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block"> |
| An implementation of a "similarity" based on the <a |
| href="http://en.wikipedia.org/wiki/Jaccard_index#Tanimoto_coefficient_.28extended_Jaccard_coefficient.29"> |
| Tanimoto coefficient</a>, or extended <a href="http://en.wikipedia.org/wiki/Jaccard_index">Jaccard |
| coefficient</a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/UncenteredCosineSimilarity.html" title="class in org.apache.mahout.cf.taste.impl.similarity">UncenteredCosineSimilarity</a></td> |
| <td class="colLast"> |
| <div class="block"> |
| An implementation of the cosine similarity.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </li> |
| </ul> |
| </div> |
| <!-- ======= START OF BOTTOM NAVBAR ====== --> |
| <div class="bottomNav"><a name="navbar.bottom"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.bottom.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../../../overview-summary.html">Overview</a></li> |
| <li class="navBarCell1Rev">Package</li> |
| <li>Class</li> |
| <li><a href="package-use.html">Use</a></li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../../../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/package-summary.html">Prev Package</a></li> |
| <li><a href="../../../../../../../org/apache/mahout/cf/taste/impl/similarity/file/package-summary.html">Next Package</a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../../../../index.html?org/apache/mahout/cf/taste/impl/similarity/package-summary.html" target="_top">Frames</a></li> |
| <li><a href="package-summary.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_bottom"> |
| <li><a href="../../../../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_bottom"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <a name="skip.navbar.bottom"> |
| <!-- --> |
| </a></div> |
| <!-- ======== END OF BOTTOM NAVBAR ======= --> |
| <p class="legalCopy"><small>Copyright © 2008–2017 <a href="http://www.apache.org/">The Apache Software Foundation</a>. All rights reserved.</small></p> |
| </body> |
| </html> |
