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+<!DOCTYPE html >
+<html>
+        <head>
+          <title>OptionStdevMetric - PredictionIO Scala API 0.12.0-incubating 
- org.apache.predictionio.controller.OptionStdevMetric</title>
+          <meta name="description" content="OptionStdevMetric - PredictionIO 
Scala API 0.12.0 - incubating - 
org.apache.predictionio.controller.OptionStdevMetric" />
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API 0.12.0 incubating org.apache.predictionio.controller.OptionStdevMetric" />
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+        </head>
+        <body class="type">
+      <div id="definition">
+        <img alt="Class" src="../../../../lib/class_big.png" />
+        <p id="owner"><a href="../../../package.html" class="extype" 
name="org">org</a>.<a href="../../package.html" class="extype" 
name="org.apache">apache</a>.<a href="../package.html" class="extype" 
name="org.apache.predictionio">predictionio</a>.<a href="package.html" 
class="extype" name="org.apache.predictionio.controller">controller</a></p>
+        <h1>OptionStdevMetric</h1><h3><span class="morelinks"><div>Related Doc:
+            <a href="package.html" class="extype" 
name="org.apache.predictionio.controller">package controller</a>
+          </div></span></h3><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      </div>
+
+      <h4 id="signature" class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">abstract </span>
+        <span class="kind">class</span>
+      </span>
+      <span class="symbol">
+        <span class="name">OptionStdevMetric</span><span 
class="tparams">[<span name="EI">EI</span>, <span name="Q">Q</span>, <span 
name="P">P</span>, <span name="A">A</span>]</span><span class="result"> extends 
<a href="Metric.html" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a>[<span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.EI">EI</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a>] with <span class="extype" 
name="org.apache.predictionio.controller.StatsOptionMetricHelper">StatsOptionMetricHelper</span>[<span
 class="extype" name="org.apache.predictionio.controller.OptionStdevMetric
 .EI">EI</span>, <span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>] with <a 
href="QPAMetric.html" class="extype" 
name="org.apache.predictionio.controller.QPAMetric">QPAMetric</a>[<span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Option"; 
class="extype" target="_top">Option</a>[<a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a>]]</span>
+      </span>
+      </h4>
+      
+          <div id="comment" class="fullcommenttop"><div class="comment 
cmt"><p>Returns the global standard deviation of the non-None score returned by 
the calculate method</p><p>This method uses org.apache.spark.util.StatCounter 
library, a one pass
+method is used for calculation
+</p></div><dl class="paramcmts block"><dt class="tparam">EI</dt><dd 
class="cmt"><p>Evaluation information</p></dd><dt class="tparam">Q</dt><dd 
class="cmt"><p>Query</p></dd><dt class="tparam">P</dt><dd 
class="cmt"><p>Predicted result</p></dd><dt class="tparam">A</dt><dd 
class="cmt"><p>Actual result</p></dd></dl><div class="toggleContainer block">
+          <span class="toggle">Linear Supertypes</span>
+          <div class="superTypes hiddenContent"><a href="QPAMetric.html" 
class="extype" 
name="org.apache.predictionio.controller.QPAMetric">QPAMetric</a>[<span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Option"; 
class="extype" target="_top">Option</a>[<a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a>]], <span class="extype" 
name="org.apache.predictionio.controller.StatsOptionMetricHelper">StatsOptionMetricHelper</span>[<span
 class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.EI">EI</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" name="org.ap
 ache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>], <a 
href="Metric.html" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a>[<span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.EI">EI</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a>], <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Serializable"; 
class="extype" target="_top">Serializable</a>, <span class="extype" 
name="java.io.Serializable">Serializable</span>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.An
 yRef" class="extype" target="_top">AnyRef</a>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></div>
+        </div></div>
+        
+
+      <div id="mbrsel">
+        <div id="textfilter"><span class="pre"></span><span 
class="input"><input id="mbrsel-input" type="text" accesskey="/" /></span><span 
class="post"></span></div>
+        <div id="order">
+              <span class="filtertype">Ordering</span>
+              <ol>
+                
+                <li class="alpha in"><span>Alphabetic</span></li>
+                <li class="inherit out"><span>By Inheritance</span></li>
+              </ol>
+            </div>
+        <div id="ancestors">
+                <span class="filtertype">Inherited<br />
+                </span>
+                <ol id="linearization">
+                  <li class="in" 
name="org.apache.predictionio.controller.OptionStdevMetric"><span>OptionStdevMetric</span></li><li
 class="in" 
name="org.apache.predictionio.controller.QPAMetric"><span>QPAMetric</span></li><li
 class="in" 
name="org.apache.predictionio.controller.StatsOptionMetricHelper"><span>StatsOptionMetricHelper</span></li><li
 class="in" 
name="org.apache.predictionio.controller.Metric"><span>Metric</span></li><li 
class="in" name="scala.Serializable"><span>Serializable</span></li><li 
class="in" name="java.io.Serializable"><span>Serializable</span></li><li 
class="in" name="scala.AnyRef"><span>AnyRef</span></li><li class="in" 
name="scala.Any"><span>Any</span></li>
+                </ol>
+              </div><div id="ancestors">
+            <span class="filtertype"></span>
+            <ol>
+              <li class="hideall out"><span>Hide All</span></li>
+              <li class="showall in"><span>Show All</span></li>
+            </ol>
+          </div>
+        <div id="visbl">
+            <span class="filtertype">Visibility</span>
+            <ol><li class="public in"><span>Public</span></li><li class="all 
out"><span>All</span></li></ol>
+          </div>
+      </div>
+
+      <div id="template">
+        <div id="allMembers">
+        <div id="constructors" class="members">
+              <h3>Instance Constructors</h3>
+              <ol><li 
name="org.apache.predictionio.controller.OptionStdevMetric#&lt;init&gt;" 
visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
+      <a 
id="&lt;init&gt;():org.apache.predictionio.controller.OptionStdevMetric[EI,Q,P,A]"></a>
+      <a id="&lt;init&gt;:OptionStdevMetric[EI,Q,P,A]"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">new</span>
+      </span>
+      <span class="symbol">
+        <span class="name">OptionStdevMetric</span><span 
class="params">()</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@&lt;init&gt;():org.apache.predictionio.controller.OptionStdevMetric[EI,Q,P,A]"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt"></p>
+    </li></ol>
+            </div>
+
+        
+
+        <div id="values" class="values members">
+              <h3>Abstract Value Members</h3>
+              <ol><li 
name="org.apache.predictionio.controller.OptionStdevMetric#calculate" 
visbl="pub" data-isabs="true" fullComment="yes" group="Ungrouped">
+      <a id="calculate(q:Q,p:P,a:A):Option[Double]"></a>
+      <a id="calculate(Q,P,A):Option[Double]"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">abstract </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">calculate</span><span class="params">(<span 
name="q">q: <span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span></span>, 
<span name="p">p: <span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span></span>, 
<span name="a">a: <span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span></span>)</span><span
 class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Option"; 
class="extype" target="_top">Option</a>[<a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a>]</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@calculate(q:Q,p:P,a:A):Option[Double]"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt">Implement this method to return a score that 
will be used for calculating
+the stdev
+across all QPA tuples.</p><div class="fullcomment"><div class="comment 
cmt"><p>Implement this method to return a score that will be used for 
calculating
+the stdev
+across all QPA tuples.</p></div><dl class="paramcmts block"><dt 
class="param">q</dt><dd class="cmt"><p>Query</p></dd><dt 
class="param">p</dt><dd class="cmt"><p>Predicted result</p></dd><dt 
class="param">a</dt><dd class="cmt"><p>Actual 
result</p></dd><dt>returns</dt><dd class="cmt"><p>Metric 
result</p></dd></dl><dl class="attributes block"> <dt>Definition 
Classes</dt><dd><a href="" class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric">OptionStdevMetric</a>
 → <a href="QPAMetric.html" class="extype" 
name="org.apache.predictionio.controller.QPAMetric">QPAMetric</a> → 
StatsOptionMetricHelper</dd></dl></div>
+    </li></ol>
+            </div>
+
+        <div id="values" class="values members">
+              <h3>Concrete Value Members</h3>
+              <ol><li name="scala.AnyRef#!=" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="!=(x$1:Any):Boolean"></a>
+      <a id="!=(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $bang$eq" class="name">!=</span><span 
class="params">(<span name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@!=(x$1:Any):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef###" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="##():Int"></a>
+      <a id="##():Int"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $hash$hash" class="name">##</span><span 
class="params">()</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int"; class="extype" 
target="_top">Int</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@##():Int"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef#==" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="==(x$1:Any):Boolean"></a>
+      <a id="==(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span title="gt4s: $eq$eq" class="name">==</span><span 
class="params">(<span name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@==(x$1:Any):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.Any#asInstanceOf" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="asInstanceOf[T0]:T0"></a>
+      <a id="asInstanceOf[T0]:T0"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">asInstanceOf</span><span class="tparams">[<span 
name="T0">T0</span>]</span><span class="result">: <span class="extype" 
name="scala.Any.asInstanceOf.T0">T0</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@asInstanceOf[T0]:T0"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>Any</dd></dl></div>
+    </li><li 
name="org.apache.predictionio.controller.OptionStdevMetric#calculate" 
visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
+      <a 
id="calculate(sc:org.apache.spark.SparkContext,evalDataSet:Seq[(EI,org.apache.spark.rdd.RDD[(Q,P,A)])]):Double"></a>
+      <a id="calculate(SparkContext,Seq[(EI,RDD[(Q,P,A)])]):Double"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">calculate</span><span class="params">(<span 
name="sc">sc: <span class="extype" 
name="org.apache.spark.SparkContext">SparkContext</span></span>, <span 
name="evalDataSet">evalDataSet: <span class="extype" 
name="scala.Seq">Seq</span>[(<span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.EI">EI</span>, <span 
class="extype" name="org.apache.spark.rdd.RDD">RDD</span>[(<span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>)])]</span>)</span><span
 class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@calculate(sc:org.apache.spark.SparkContext,evalDataSet:Seq[(EI,org.apache.spark.rdd.RDD[(Q,P,A)])]):Double"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt">Calculates the result of this <a 
href="Metric.html" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a>.</p><div 
class="fullcomment"><div class="comment cmt"><p>Calculates the result of this 
<a href="Metric.html" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a>.</p></div><dl 
class="attributes block"> <dt>Definition Classes</dt><dd><a href="" 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric">OptionStdevMetric</a>
 → <a href="Metric.html" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a></dd></dl></div>
+    </li><li 
name="org.apache.predictionio.controller.StatsOptionMetricHelper#calculateStats"
 visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
+      <a 
id="calculateStats(sc:org.apache.spark.SparkContext,evalDataSet:Seq[(EI,org.apache.spark.rdd.RDD[(Q,P,A)])]):org.apache.spark.util.StatCounter"></a>
+      <a 
id="calculateStats(SparkContext,Seq[(EI,RDD[(Q,P,A)])]):StatCounter"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">calculateStats</span><span class="params">(<span 
name="sc">sc: <span class="extype" 
name="org.apache.spark.SparkContext">SparkContext</span></span>, <span 
name="evalDataSet">evalDataSet: <span class="extype" 
name="scala.Seq">Seq</span>[(<span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.EI">EI</span>, <span 
class="extype" name="org.apache.spark.rdd.RDD">RDD</span>[(<span class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>)])]</span>)</span><span
 class="result">: <span class="extype" 
name="org.apache.spark.util.StatCounter">StatCounter</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@calculateStats(sc:org.apache.spark.SparkContext,evalDataSet:Seq[(EI,org.apache.spark.rdd.RDD[(Q,P,A)])]):org.apache.spark.util.StatCounter"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>StatsOptionMetricHelper</dd></dl></div>
+    </li><li name="scala.AnyRef#clone" visbl="prt" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="clone():Object"></a>
+      <a id="clone():AnyRef"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">clone</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@clone():Object"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> 
<dt>Attributes</dt><dd>protected[<a href="../../../../java$lang.html" 
class="extype" name="java.lang">java.lang</a>] </dd><dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="defval" 
name="classOf[java.lang.CloneNotSupportedException]">...</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li><li name="org.apache.predictionio.controller.Metric#compare" 
visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
+      <a id="compare(r0:R,r1:R):Int"></a>
+      <a id="compare(Double,Double):Int"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">compare</span><span class="params">(<span 
name="r0">r0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a></span>, <span name="r1">r1: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int"; class="extype" 
target="_top">Int</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@compare(r0:R,r1:R):Int"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt">Comparison function for R's 
ordering.</p><div class="fullcomment"><div class="comment cmt"><p>Comparison 
function for R's ordering.</p></div><dl class="attributes block"> 
<dt>Definition Classes</dt><dd><a href="Metric.html" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a></dd></dl></div>
+    </li><li name="scala.AnyRef#eq" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="eq(x$1:AnyRef):Boolean"></a>
+      <a id="eq(AnyRef):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">eq</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@eq(x$1:AnyRef):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#equals" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="equals(x$1:Any):Boolean"></a>
+      <a id="equals(Any):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">equals</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Any"; class="extype" 
target="_top">Any</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@equals(x$1:Any):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef#finalize" visbl="prt" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="finalize():Unit"></a>
+      <a id="finalize():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">finalize</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@finalize():Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> 
<dt>Attributes</dt><dd>protected[<a href="../../../../java$lang.html" 
class="extype" name="java.lang">java.lang</a>] </dd><dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="symbol">classOf[java.lang.Throwable]</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li><li name="scala.AnyRef#getClass" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="getClass():Class[_]"></a>
+      <a id="getClass():Class[_]"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">getClass</span><span class="params">()</span><span 
class="result">: <span class="extype" 
name="java.lang.Class">Class</span>[_]</span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@getClass():Class[_]"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef#hashCode" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="hashCode():Int"></a>
+      <a id="hashCode():Int"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">hashCode</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int"; class="extype" 
target="_top">Int</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@hashCode():Int"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="org.apache.predictionio.controller.Metric#header" 
visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
+      <a id="header:String"></a>
+      <a id="header:String"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">header</span><span class="result">: <span 
class="extype" name="scala.Predef.String">String</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@header:String"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <p class="shortcomment cmt">Class name of this <a href="Metric.html" 
class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a>.</p><div 
class="fullcomment"><div class="comment cmt"><p>Class name of this <a 
href="Metric.html" class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a>.</p></div><dl 
class="attributes block"> <dt>Definition Classes</dt><dd><a href="Metric.html" 
class="extype" 
name="org.apache.predictionio.controller.Metric">Metric</a></dd></dl></div>
+    </li><li name="scala.Any#isInstanceOf" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="isInstanceOf[T0]:Boolean"></a>
+      <a id="isInstanceOf[T0]:Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">isInstanceOf</span><span class="tparams">[<span 
name="T0">T0</span>]</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@isInstanceOf[T0]:Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>Any</dd></dl></div>
+    </li><li name="scala.AnyRef#ne" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="ne(x$1:AnyRef):Boolean"></a>
+      <a id="ne(AnyRef):Boolean"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">ne</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.AnyRef"; 
class="extype" target="_top">AnyRef</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Boolean"; 
class="extype" target="_top">Boolean</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@ne(x$1:AnyRef):Boolean"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#notify" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="notify():Unit"></a>
+      <a id="notify():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">notify</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@notify():Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#notifyAll" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="notifyAll():Unit"></a>
+      <a id="notifyAll():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">notifyAll</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@notifyAll():Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#synchronized" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="synchronized[T0](x$1:=&gt;T0):T0"></a>
+      <a id="synchronized[T0](⇒T0):T0"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">synchronized</span><span class="tparams">[<span 
name="T0">T0</span>]</span><span class="params">(<span name="arg0">arg0: ⇒ 
<span class="extype" 
name="java.lang.AnyRef.synchronized.T0">T0</span></span>)</span><span 
class="result">: <span class="extype" 
name="java.lang.AnyRef.synchronized.T0">T0</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@synchronized[T0](x$1:=&gt;T0):T0"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd></dl></div>
+    </li><li name="scala.AnyRef#toString" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="toString():String"></a>
+      <a id="toString():String"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier"></span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">toString</span><span class="params">()</span><span 
class="result">: <span class="extype" 
name="java.lang.String">String</span></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@toString():String"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef → Any</dd></dl></div>
+    </li><li name="scala.AnyRef#wait" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="wait():Unit"></a>
+      <a id="wait():Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">wait</span><span class="params">()</span><span 
class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@wait():Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="defval" 
name="classOf[java.lang.InterruptedException]">...</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li><li name="scala.AnyRef#wait" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="wait(x$1:Long,x$2:Int):Unit"></a>
+      <a id="wait(Long,Int):Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">wait</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Long"; 
class="extype" target="_top">Long</a></span>, <span name="arg1">arg1: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int"; class="extype" 
target="_top">Int</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@wait(x$1:Long,x$2:Int):Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="defval" 
name="classOf[java.lang.InterruptedException]">...</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li><li name="scala.AnyRef#wait" visbl="pub" data-isabs="false" 
fullComment="yes" group="Ungrouped">
+      <a id="wait(x$1:Long):Unit"></a>
+      <a id="wait(Long):Unit"></a>
+      <h4 class="signature">
+      <span class="modifier_kind">
+        <span class="modifier">final </span>
+        <span class="kind">def</span>
+      </span>
+      <span class="symbol">
+        <span class="name">wait</span><span class="params">(<span 
name="arg0">arg0: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Long"; 
class="extype" target="_top">Long</a></span>)</span><span class="result">: <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Unit"; 
class="extype" target="_top">Unit</a></span>
+      </span>
+      </h4><span class="permalink">
+      <a 
href="../../../../index.html#org.apache.predictionio.controller.OptionStdevMetric@wait(x$1:Long):Unit"
 title="Permalink" target="_top">
+        <img src="../../../../lib/permalink.png" alt="Permalink" />
+      </a>
+    </span>
+      <div class="fullcomment"><dl class="attributes block"> <dt>Definition 
Classes</dt><dd>AnyRef</dd><dt>Annotations</dt><dd>
+                <span class="name">@throws</span><span class="args">(<span>
+      
+      <span class="defval" 
name="classOf[java.lang.InterruptedException]">...</span>
+    </span>)</span>
+              
+        </dd></dl></div>
+    </li></ol>
+            </div>
+
+        
+
+        
+        </div>
+
+        <div id="inheritedMembers">
+        <div class="parent" 
name="org.apache.predictionio.controller.QPAMetric">
+              <h3>Inherited from <a href="QPAMetric.html" class="extype" 
name="org.apache.predictionio.controller.QPAMetric">QPAMetric</a>[<span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>, <a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Option"; 
class="extype" target="_top">Option</a>[<a 
href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Double"; 
class="extype" target="_top">Double</a>]]</h3>
+            </div><div class="parent" 
name="org.apache.predictionio.controller.StatsOptionMetricHelper">
+              <h3>Inherited from <span class="extype" 
name="org.apache.predictionio.controller.StatsOptionMetricHelper">StatsOptionMetricHelper</span>[<span
 class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.EI">EI</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.Q">Q</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.P">P</span>, <span 
class="extype" 
name="org.apache.predictionio.controller.OptionStdevMetric.A">A</span>]</h3>
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name="org.apache.predictionio.controller.Metric">
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