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Parameters</span></a></li><li class="level-2"><a class="final" 
href="/deploy/enginevariants/"><span>Deploying Multiple Engine 
Variants</span></a></li><li class="level-2"><a class="final" 
href="/deploy/plugin/"><span>Engine Server Plugin</span></a></li></ul></li><li 
class="level-1"><a class="expandible" href="#"><span>Customizing an 
Engine</span></a><ul><li class="level-2"><a class="final" 
href="/customize/"><span>Learning DASE</span></a></li><li class="level-2"><a 
class="final" href="/customize/dase/"><span>Implement DASE</span></a></li><li 
class="level-2"><a class="final" 
href="/customize/troubleshooting/"><span>Troubleshooting Engine 
Development</span></a></li><li class="level-2"><a class="final" 
href="/api/current/#package"><span>Engine Scala 
APIs</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Collecting and A
 nalyzing Data</span></a><ul><li class="level-2"><a class="final" 
href="/datacollection/"><span>Event Server Overview</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/eventapi/"><span>Collecting Data with 
REST/SDKs</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/eventmodel/"><span>Events Modeling</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/webhooks/"><span>Unifying Multichannel Data with 
Webhooks</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/channel/"><span>Channel</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/batchimport/"><span>Importing Data in 
Batch</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/analytics/"><span>Using Analytics 
Tools</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/plugin/"><span>Event Server 
Plugin</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><s
 pan>Choosing an Algorithm(s)</span></a><ul><li class="level-2"><a class="final 
active" href="/algorithm/"><span>Built-in Algorithm 
Libraries</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/switch/"><span>Switching to Another 
Algorithm</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/multiple/"><span>Combining Multiple 
Algorithms</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/custom/"><span>Adding Your Own 
Algorithms</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>ML Tuning and Evaluation</span></a><ul><li class="level-2"><a 
class="final" href="/evaluation/"><span>Overview</span></a></li><li 
class="level-2"><a class="final" 
href="/evaluation/paramtuning/"><span>Hyperparameter Tuning</span></a></li><li 
class="level-2"><a class="final" 
href="/evaluation/evaluationdashboard/"><span>Evaluation 
Dashboard</span></a></li><li class="level-2"><a class="final" 
href="/evaluation/metricchoose/"><span
 >Choosing Evaluation Metrics</span></a></li><li class="level-2"><a 
 >class="final" href="/evaluation/metricbuild/"><span>Building Evaluation 
 >Metrics</span></a></li></ul></li><li class="level-1"><a class="expandible" 
 >href="#"><span>System Architecture</span></a><ul><li class="level-2"><a 
 >class="final" href="/system/"><span>Architecture Overview</span></a></li><li 
 >class="level-2"><a class="final" href="/system/anotherdatastore/"><span>Using 
 >Another Data Store</span></a></li></ul></li><li class="level-1"><a 
 >class="expandible" href="#"><span>PredictionIO Official 
 >Templates</span></a><ul><li class="level-2"><a class="final" 
 >href="/templates/"><span>Intro</span></a></li><li class="level-2"><a 
 >class="expandible" href="#"><span>Recommendation</span></a><ul><li 
 >class="level-3"><a class="final" 
 >href="/templates/recommendation/quickstart/"><span>Quick 
 >Start</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/recommendation/dase/"><span>DASE</span></a></li><li 
 >class="level-3"><a 
 class="final" href="/templates/recommendation/evaluation/"><span>Evaluation 
Explained</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/recommendation/reading-custom-events/"><span>Read Custom 
Events</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-data-prep/"><span>Customize Data 
Preparator</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-serving/"><span>Customize 
Serving</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/training-with-implicit-preference/"><span>Train 
with Implicit Preference</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/blacklist-items/"><span>Filter Recommended 
Items by Blacklist in Query</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/batch-eval
 uator/"><span>Batch Persistable Evaluator</span></a></li></ul></li><li 
class="level-2"><a class="expandible" href="#"><span>E-Commerce 
Recommendation</span></a><ul><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/how-to/"><span>How-To</span></a></li><li
 class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/train-with-rate-event/"><span>Train 
with Rate Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/adjust-score/"><span>Adjust 
Score</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>Similar Product</span></a><ul><li class="level-3"><a 
class="final" href="/templates/similarproduct/quickstart/"><span>Quick 
Start</span></a></li
 ><li class="level-3"><a class="final" 
 >href="/templates/similarproduct/dase/"><span>DASE</span></a></li><li 
 >class="level-3"><a class="final" 
 >href="/templates/similarproduct/how-to/"><span>How-To</span></a></li><li 
 >class="level-3"><a class="final" 
 >href="/templates/similarproduct/multi-events-multi-algos/"><span>Multiple 
 >Events and Multiple Algorithms</span></a></li><li class="level-3"><a 
 >class="final" 
 >href="/templates/similarproduct/return-item-properties/"><span>Returns Item 
 >Properties</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/similarproduct/train-with-rate-event/"><span>Train with Rate 
 >Event</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/similarproduct/rid-user-set-event/"><span>Get Rid of Events 
 >for Users</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/similarproduct/recommended-user/"><span>Recommend 
 >Users</span></a></li></ul></li><li class="level-2"><a class="expandible" 
 >href="#"><span>Classification</span></a>
 <ul><li class="level-3"><a class="final" 
href="/templates/classification/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/classification/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/classification/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/classification/add-algorithm/"><span>Use Alternative 
Algorithm</span></a></li><li class="level-3"><a class="final" 
href="/templates/classification/reading-custom-properties/"><span>Read Custom 
Properties</span></a></li></ul></li></ul></li><li class="level-1"><a 
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href="/gallery/template-gallery/"><span>Browse</span></a></li><li 
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Template</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href=
 "#"><span>Demo Tutorials</span></a><ul><li class="level-2"><a class="final" 
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class="level-2"><a class="final" 
href="/community/contribute-webhook/"><span>Contribute a 
Webhook</span></a></li><li class="level-2"><a class="final" href="/c
 ommunity/projects/"><span>Community Projects</span></a></li></ul></li><li 
class="level-1"><a class="expandible" href="#"><span>Getting 
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href="/resources/intellij/"><span>Developing Engines with IntelliJ 
IDEA</span></a></li><li class="level-2"><a class="final" 
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class="level-2"><a class="final" 
href="/resources/glossary/"><span>Glossary</span></a></li></ul></li><li 
class="level-1"><a class="expandible" href="#"><s
 pan>Apache Software Foundation</span></a><ul><li class="level-2"><a 
class="final" href="https://www.apache.org/";><span>Apache 
Homepage</span></a></li><li class="level-2"><a class="final" 
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class="spacer">&gt;</span></li><li><span class="last">Built-in Algorithm 
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Algorithm(s)</a><span class="spacer">&gt;</span></li><li><span 
class="last">Built-in Algorithm Libraries</span></li></ul></div><div 
id="page-title"><h1>Built-in Algorithm Libraries</h1></div></div><div 
class="content"> <p>An engine can virtually call any algorithm in the Algorithm 
class. Apache PredictionIO currently offers native support to <a 
href="http://spark.apache.org/docs/latest/mllib-guide.html";>Spark MLlib</a> 
machine learning library. It is being used by some of the engine templates in 
the <a href="/gallery/template-gallery">template gallery</a>.</p><p>More 
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href="/api/current/#package"><span>Engine Scala 
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href="#"><span>Collecting and 
 Analyzing Data</span></a><ul><li class="level-2"><a class="final" 
href="/datacollection/"><span>Event Server Overview</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/eventapi/"><span>Collecting Data with 
REST/SDKs</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/eventmodel/"><span>Events Modeling</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/webhooks/"><span>Unifying Multichannel Data with 
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 span>Choosing an Algorithm(s)</span></a><ul><li class="level-2"><a 
class="final active" href="/algorithm/"><span>Built-in Algorithm 
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href="/algorithm/switch/"><span>Switching to Another 
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href="/algorithm/multiple/"><span>Combining Multiple 
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href="/algorithm/custom/"><span>Adding Your Own 
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class="final" href="/evaluation/"><span>Overview</span></a></li><li 
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class="level-2"><a class="final" 
href="/evaluation/evaluationdashboard/"><span>Evaluation 
Dashboard</span></a></li><li class="level-2"><a class="final" 
href="/evaluation/metricchoose/"><spa
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Another Data Store</span></a></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>PredictionIO® Official 
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Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/dase/"><span>DASE</span></a></li><li 
class="level-3">
 <a class="final" href="/templates/recommendation/evaluation/"><span>Evaluation 
Explained</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/recommendation/reading-custom-events/"><span>Read Custom 
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href="/templates/recommendation/batch-e
 valuator/"><span>Batch Persistable Evaluator</span></a></li></ul></li><li 
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href="/templates/ecommercerecommendation/how-to/"><span>How-To</span></a></li><li
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class="final" href="/templates/similarproduct/quickstart/"><span>Quick 
Start</span></a><
 /li><li class="level-3"><a class="final" 
href="/templates/similarproduct/dase/"><span>DASE</span></a></li><li 
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Events and Multiple Algorithms</span></a></li><li class="level-3"><a 
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href="/templates/similarproduct/return-item-properties/"><span>Returns Item 
Properties</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/train-with-rate-event/"><span>Train with Rate 
Event</span></a></li><li class="level-3"><a class="final" 
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for Users</span></a></li><li class="level-3"><a class="final" 
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Users</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>Classification</span><
 /a><ul><li class="level-3"><a class="final" 
href="/templates/classification/quickstart/"><span>Quick 
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href="/templates/classification/dase/"><span>DASE</span></a></li><li 
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 ef="#"><span>Demo Tutorials</span></a><ul><li class="level-2"><a class="final" 
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IDEA</span></a></li><li class="level-2"><a class="final" 
href="/resources/upgrade/"><span>Upgrade Instructions</span></a></li><li 
class="level-2"><a class="final" 
href="/resources/glossary/"><span>Glossary</span></a></li></ul></li><li 
class="level-1"><a class="expandible" href="#"
 ><span>Apache Software Foundation</span></a><ul><li class="level-2"><a 
 >class="final" href="https://www.apache.org/";><span>Apache 
 >Homepage</span></a></li><li class="level-2"><a class="final" 
 >href="https://www.apache.org/licenses/";><span>License</span></a></li><li 
 >class="level-2"><a class="final" 
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 > class="level-2"><a class="final" 
 >href="https://www.apache.org/foundation/thanks.html";><span>Thanks</span></a></li><li
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 > class="col-md-9 col-sm-12"><div class="content-header hidden-md 
 >hidden-lg"><div id="breadcrumbs" class="hidden-sm hidden xs"><ul><li><a 
 >href="#">Choosing an Algorithm(s)</a><span 
 >class="spacer">&gt;</span></li><li><span class="last">Built-in Algorithm 
 >Libraries</span></li></ul></div><div id="page-title"><h1>Built-in Algorithm 
 >Libraries</h1></div></div
 ><div id="table-of-content-wrapper"><a id="edit-page-link" 
 >href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/algorithm/index.html.md";><img
 > src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div 
 >class="content-header hidden-sm hidden-xs"><div id="breadcrumbs" 
 >class="hidden-sm hidden xs"><ul><li><a href="#">Choosing an 
 >Algorithm(s)</a><span class="spacer">&gt;</span></li><li><span 
 >class="last">Built-in Algorithm Libraries</span></li></ul></div><div 
 >id="page-title"><h1>Built-in Algorithm Libraries</h1></div></div><div 
 >class="content"> <p>An engine can virtually call any algorithm in the 
 >Algorithm class. Apache PredictionIO currently offers native support to <a 
 >href="http://spark.apache.org/docs/latest/mllib-guide.html";>Spark MLlib</a> 
 >machine learning library. It is being used by some of the engine templates in 
 >the <a href="/gallery/template-gallery">template gallery</a>.</p><p>More 
 >library support will be added soon.</p></div></
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