site/javadoc/r1.2.0/org/apache/edgent/analytics/math3/Aggregations.html - incubator-retired-edgent-website - Git at Google

 <!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_112) on Mon Dec 18 11:25:20 EST 2017 -->
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <title>Aggregations (Apache Edgent (incubating) v1.2.0 API)</title>
 <meta name="date" content="2017-12-18">
 <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="Aggregations (Apache Edgent (incubating) v1.2.0 API)";
         }
     }
     catch(err) {
     }
 //-->
 var methods = {"i0":9,"i1":9,"i2":9,"i3":9,"i4":9,"i5":9};
 var tabs = {65535:["t0","All Methods"],1:["t1","Static Methods"],8:["t4","Concrete Methods"]};
 var altColor = "altColor";
 var rowColor = "rowColor";
 var tableTab = "tableTab";
 var activeTableTab = "activeTableTab";
 </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><a href="package-summary.html">Package</a></li>
 <li class="navBarCell1Rev">Class</li>
 <li><a href="class-use/Aggregations.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>Prev&nbsp;Class</li>
 <li><a href="../../../../../org/apache/edgent/analytics/math3/MvResultMap.html" title="class in org.apache.edgent.analytics.math3"><span class="typeNameLink">Next&nbsp;Class</span></a></li>
 </ul>
 <ul class="navList">
 <li><a href="../../../../../index.html?org/apache/edgent/analytics/math3/Aggregations.html" target="_top">Frames</a></li>
 <li><a href="Aggregations.html" target="_top">No&nbsp;Frames</a></li>
 </ul>
 <ul class="navList" id="allclasses_navbar_top">
 <li><a href="../../../../../allclasses-noframe.html">All&nbsp;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>
 <div>
 <ul class="subNavList">
 <li>Summary:&nbsp;</li>
 <li>Nested&nbsp;|&nbsp;</li>
 <li>Field&nbsp;|&nbsp;</li>
 <li><a href="#constructor.summary">Constr</a>&nbsp;|&nbsp;</li>
 <li><a href="#method.summary">Method</a></li>
 </ul>
 <ul class="subNavList">
 <li>Detail:&nbsp;</li>
 <li>Field&nbsp;|&nbsp;</li>
 <li><a href="#constructor.detail">Constr</a>&nbsp;|&nbsp;</li>
 <li><a href="#method.detail">Method</a></li>
 </ul>
 </div>
 <a name="skip.navbar.top">
 <!--   -->
 </a></div>
 <!-- ========= END OF TOP NAVBAR ========= -->
 <!-- ======== START OF CLASS DATA ======== -->
 <div class="header">
 <div class="subTitle">org.apache.edgent.analytics.math3</div>
 <h2 title="Class Aggregations" class="title">Class Aggregations</h2>
 </div>
 <div class="contentContainer">
 <ul class="inheritance">
 <li><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
 <li>
 <ul class="inheritance">
 <li>org.apache.edgent.analytics.math3.Aggregations</li>
 </ul>
 </li>
 </ul>
 <div class="description">
 <ul class="blockList">
 <li class="blockList">
 <hr>
 <br>
 <pre>public class <span class="typeNameLabel">Aggregations</span>
 extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
 <div class="block">Apache Common Math analytics for Collections.

  <p>These operations are typically used when processing a collection of tuples
  in a non-partitioned or partitioned <a href="../../../../../org/apache/edgent/topology/TWindow.html" title="interface in org.apache.edgent.topology"><code>TWindow</code></a>.

  <p>Simple sum aggregation functions are also provided (helpful given the avoidance
  of depending on Java8 Streams).

  <p>Example: compute a batched MEAN aggregation for a simple unpartitioned window of
  numeric <code>TStream&lt;Double&gt;</code> where the desired result is a <code>TStream&lt;Double&gt;</code> of
  the MEAN values:
  <pre><code>
   TStream&lt;Double&gt; pressureReadings = ...
 TWindow&lt;Double,Integer&gt; window = pressureReadings.last(5, Functions.unpartitioned());
 TStream&lt;Double&gt; meanPressureReadings = window.batch(
       (list, partition) -&gt; Aggregations.aggregate(list, Statistic2.MEAN));
  </code></pre>

  <p>Example: compute the MEAN and SLOPE, capturing the results in a <a href="../../../../../org/apache/edgent/analytics/math3/ResultMap.html" title="class in org.apache.edgent.analytics.math3"><code>ResultMap</code></a>:
  <pre><code>
   TStream&lt;Double&gt; pressureReadings = ...
 TWindow&lt;Double,Integer&gt; window = pressureReadings.last(5, Functions.unpartitioned());
 TStream&lt;ResultMap&gt; meanPressureReadings = window.batch(
       (list, partition) -&gt; Aggregations.aggregateN(list, Statistic2.MEAN, Regression2.SLOPE));
  </code></pre>

  <p>Example: compute multiple aggregations on multiple variables in a tuple T,
  capturing the results in a <a href="../../../../../org/apache/edgent/analytics/math3/MvResultMap.html" title="class in org.apache.edgent.analytics.math3"><code>MvResultMap</code></a>:
  <pre><code>
 class SensorReading {
   double getTemp() {...};
   double getPressure() {...};
   ... };
 TStream&lt;SensorReading&gt; readings = ...
 TWindow&lt;SensorReading,Integer&gt; window = sensorReadings.last(5, Functions.unpartitioned());
 TStream&lt;MvResultMap&gt; aggregations = window.batch(
       (list, partition) -&gt; {
         ResultMap pressureResults = Aggregations.aggregateN(list, t -&gt; t.getPressure(), Statistic2.MEAN, Regression2.SLOPE));
         ResultMap tempResults = Aggregations.aggregateN(list, t -&gt; t.getTemp(), Statistic2.MAX));
         MvResultMap results = Aggregations.newMvResults();
         results.put("pressure", pressureResults);
         results.put("temp", tempResults);
         return results;
       });
  </code></pre>

  <p>Example: convert a <code>TStream&lt;ResultMap&gt;</code> or <code>TStream&lt;MvResultMap&gt;</code> to a JsonObject:

  <pre><code>
    TStream&lt;ResultMap&gt; resultMap = ...
  TStream&lt;JsonObject&gt; joResultMap = resultMap.map(ResultMap.toJsonObject());
  </code></pre>


  <p>Background:
  <a href="../../../../../org/apache/edgent/analytics/math3/json/JsonAnalytics.html" title="class in org.apache.edgent.analytics.math3.json"><code>JsonAnalytics</code></a> predates this class.  Use of JsonAnalytics for computing
  Apache Commons Math aggregations requires:
  <ul>
  <li>the input stream tuple type must be a JsonObject and the user must identify
      the property that contains the value to be aggregated.</li>
  <li>batched window aggregations are not supported (they could be added).</li>
  <li>the aggregation result tuple is a JsonObject that holds a user-specified
      property for a window partition key and a user-specified property
      for a JsonObject holding the UnivariateAggregation results by name (e.g., "MEAN").
      Accessing a particular aggregation results in the JsonObject
      is somewhat cumbersome.</li>
  </ul>

  <p>As a result, using JsonAnalytics for simple cases can be a bit unintuitive and cumbersome.

  <p>For example, to JsonAnalytics for a simple case of a continuous aggregation
  of <code>TStream&lt;Double&gt;</code> =&gt; <code>TStream&lt;Double&gt;</code> of MEAN values:

  <pre><code>
   TStream&lt;Double&gt; pressureReadings = ...

  // transform TStream&lt;Double&gt; to TStream&lt;JsonObject&gt;
  TStream&lt;JsonObject&gt; joPressureReadings = pressureReadings.map(JsonFunctions.valueOfDouble("pressure"));

  // aggregate
  TWindow&lt;JsonObject,JsonElement&gt; window = joPressureReadings.last(5, JsonFunctions.unpartitioned());
  TStream&lt;JsonObject&gt; results = JsonAnalytics.aggregate(window, "partition", "pressure", Statistic.MEAN);

  // transform to TStream&lt;Double&gt; mean results
  TStream&lt;Double&gt; meanPressureReadings = results.map(jo -&gt; jo.get("pressure").getAsObject().get("MEAN").getAsDouble());
  </code></pre>

  <p>Using Aggregations it's simply:

  <pre><code>
 TWindow&lt;Double,Integer&gt; window = pressureReadings.last(5, Functions.unpartitioned());
 TStream&lt;Double&gt; meanPressureReadings = window.aggregate(
       (list, partition) -&gt; Aggregations.aggregate(list, Statistic2.MEAN));
  </code></pre></div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../org/apache/edgent/analytics/math3/stat/Statistic2.html" title="enum in org.apache.edgent.analytics.math3.stat"><code>Statistic2</code></a>,
 <a href="../../../../../org/apache/edgent/analytics/math3/stat/Regression2.html" title="enum in org.apache.edgent.analytics.math3.stat"><code>Regression2</code></a>,
 <a href="../../../../../org/apache/edgent/analytics/math3/json/JsonAnalytics.html" title="class in org.apache.edgent.analytics.math3.json"><code>JsonAnalytics</code></a></dd>
 </dl>
 </li>
 </ul>
 </div>
 <div class="summary">
 <ul class="blockList">
 <li class="blockList">
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <ul class="blockList">
 <li class="blockList"><a name="constructor.summary">
 <!--   -->
 </a>
 <h3>Constructor Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
 <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/analytics/math3/Aggregations.html#Aggregations--">Aggregations</a></span>()</code>&nbsp;</td>
 </tr>
 </table>
 </li>
 </ul>
 <!-- ========== METHOD SUMMARY =========== -->
 <ul class="blockList">
 <li class="blockList"><a name="method.summary">
 <!--   -->
 </a>
 <h3>Method Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/analytics/math3/Aggregations.html#aggregate-java.util.Collection-org.apache.edgent.analytics.math3.UnivariateAggregate-">aggregate</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;c,
          <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>&nbsp;aggregate)</code>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> on a Collection of <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang"><code>Number</code></a>.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>static &lt;T&gt;&nbsp;<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/analytics/math3/Aggregations.html#aggregate-java.util.Collection-org.apache.edgent.function.ToDoubleFunction-org.apache.edgent.analytics.math3.UnivariateAggregate-">aggregate</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;T&gt;&nbsp;c,
          <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function">ToDoubleFunction</a>&lt;T&gt;&nbsp;getter,
          <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>&nbsp;aggregate)</code>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> a Collection of <code>T</code>
  using the specified <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function"><code>getter</code></a> to extract the
  variable to aggregate.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>static <a href="../../../../../org/apache/edgent/analytics/math3/ResultMap.html" title="class in org.apache.edgent.analytics.math3">ResultMap</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/analytics/math3/Aggregations.html#aggregateN-java.util.Collection-org.apache.edgent.analytics.math3.UnivariateAggregate...-">aggregateN</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;c,
           <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>...&nbsp;aggregates)</code>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> on a Collection of <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang"><code>Number</code></a>.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>static &lt;T&gt;&nbsp;<a href="../../../../../org/apache/edgent/analytics/math3/ResultMap.html" title="class in org.apache.edgent.analytics.math3">ResultMap</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/analytics/math3/Aggregations.html#aggregateN-java.util.Collection-org.apache.edgent.function.ToDoubleFunction-org.apache.edgent.analytics.math3.UnivariateAggregate...-">aggregateN</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;T&gt;&nbsp;c,
           <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function">ToDoubleFunction</a>&lt;T&gt;&nbsp;getter,
           <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>...&nbsp;aggregates)</code>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> a Collection of <code>T</code>
  using the specified <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function"><code>getter</code></a> to extract the
  variable to aggregate.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/analytics/math3/Aggregations.html#sum-java.util.Collection-">sum</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;list)</code>
 <div class="block">Perform a sum of numbers treated as double values, accumulating in a double.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>static long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/analytics/math3/Aggregations.html#sumInts-java.util.Collection-">sumInts</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;list)</code>
 <div class="block">Perform a sum of numbers treated as long values, accumulating in a long.</div>
 </td>
 </tr>
 </table>
 <ul class="blockList">
 <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
 <!--   -->
 </a>
 <h3>Methods inherited from class&nbsp;java.lang.<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
 <code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
 </ul>
 </li>
 </ul>
 </li>
 </ul>
 </div>
 <div class="details">
 <ul class="blockList">
 <li class="blockList">
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <ul class="blockList">
 <li class="blockList"><a name="constructor.detail">
 <!--   -->
 </a>
 <h3>Constructor Detail</h3>
 <a name="Aggregations--">
 <!--   -->
 </a>
 <ul class="blockListLast">
 <li class="blockList">
 <h4>Aggregations</h4>
 <pre>public&nbsp;Aggregations()</pre>
 </li>
 </ul>
 </li>
 </ul>
 <!-- ============ METHOD DETAIL ========== -->
 <ul class="blockList">
 <li class="blockList"><a name="method.detail">
 <!--   -->
 </a>
 <h3>Method Detail</h3>
 <a name="sum-java.util.Collection-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>sum</h4>
 <pre>public static&nbsp;<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;sum(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;list)</pre>
 <div class="block">Perform a sum of numbers treated as double values, accumulating in a double.
  An empty list yields a 0.0 result.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>list</code> - numbers to sum</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the sum</dd>
 </dl>
 </li>
 </ul>
 <a name="sumInts-java.util.Collection-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>sumInts</h4>
 <pre>public static&nbsp;long&nbsp;sumInts(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;list)</pre>
 <div class="block">Perform a sum of numbers treated as long values, accumulating in a long.
  More efficient than sum() for non-floating point values.
  An empty list yields a 0 result.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>list</code> - numbers to sum</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the sum</dd>
 </dl>
 </li>
 </ul>
 <a name="aggregate-java.util.Collection-org.apache.edgent.analytics.math3.UnivariateAggregate-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>aggregate</h4>
 <pre>public static&nbsp;<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;aggregate(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;c,
                                <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>&nbsp;aggregate)</pre>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> on a Collection of <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang"><code>Number</code></a>.

  <p>A null result is returned if the collection is empty.
  An aggregation result may be null under other conditions,
  e.g., a Regression2.SLOPE where the minimum number of samples has not been met.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>c</code> - the Collection to aggregate</dd>
 <dd><code>aggregate</code> - the aggregation to perform</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the aggregation result, may be null.</dd>
 </dl>
 </li>
 </ul>
 <a name="aggregateN-java.util.Collection-org.apache.edgent.analytics.math3.UnivariateAggregate...-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>aggregateN</h4>
 <pre>public static&nbsp;<a href="../../../../../org/apache/edgent/analytics/math3/ResultMap.html" title="class in org.apache.edgent.analytics.math3">ResultMap</a>&nbsp;aggregateN(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;? extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&gt;&nbsp;c,
                                    <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>...&nbsp;aggregates)</pre>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> on a Collection of <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang"><code>Number</code></a>.

  <p>If the collection is empty an empty ResultMap is returned.
  The ResultMap does not contain an entry for an aggregation with a null,
  e.g., a Regression2.SLOPE where the minimum number of samples has not been met.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>c</code> - the Collection to aggregate</dd>
 <dd><code>aggregates</code> - the aggregations to perform</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a <a href="../../../../../org/apache/edgent/analytics/math3/ResultMap.html" title="class in org.apache.edgent.analytics.math3"><code>ResultMap</code></a> containing the variable's aggregation results</dd>
 </dl>
 </li>
 </ul>
 <a name="aggregate-java.util.Collection-org.apache.edgent.function.ToDoubleFunction-org.apache.edgent.analytics.math3.UnivariateAggregate-">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>aggregate</h4>
 <pre>public static&nbsp;&lt;T&gt;&nbsp;<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;aggregate(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;T&gt;&nbsp;c,
                                    <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function">ToDoubleFunction</a>&lt;T&gt;&nbsp;getter,
                                    <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>&nbsp;aggregate)</pre>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> a Collection of <code>T</code>
  using the specified <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function"><code>getter</code></a> to extract the
  variable to aggregate.

  <p>A null result is returned if the collection is empty.
  An aggregation result may be null under other conditions,
  e.g., a Regression2.SLOPE where the minimum number of samples has not been met.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - Tuple type</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>c</code> - the Collection to aggregate</dd>
 <dd><code>getter</code> - function that returns the variable to aggregate from a <code>T</code></dd>
 <dd><code>aggregate</code> - the aggregation to perform</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the aggregation result, may be null.</dd>
 </dl>
 </li>
 </ul>
 <a name="aggregateN-java.util.Collection-org.apache.edgent.function.ToDoubleFunction-org.apache.edgent.analytics.math3.UnivariateAggregate...-">
 <!--   -->
 </a>
 <ul class="blockListLast">
 <li class="blockList">
 <h4>aggregateN</h4>
 <pre>public static&nbsp;&lt;T&gt;&nbsp;<a href="../../../../../org/apache/edgent/analytics/math3/ResultMap.html" title="class in org.apache.edgent.analytics.math3">ResultMap</a>&nbsp;aggregateN(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;T&gt;&nbsp;c,
                                        <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function">ToDoubleFunction</a>&lt;T&gt;&nbsp;getter,
                                        <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3">UnivariateAggregate</a>...&nbsp;aggregates)</pre>
 <div class="block">Perform the specified <a href="../../../../../org/apache/edgent/analytics/math3/UnivariateAggregate.html" title="interface in org.apache.edgent.analytics.math3"><code>UnivariateAggregate</code></a> a Collection of <code>T</code>
  using the specified <a href="../../../../../org/apache/edgent/function/ToDoubleFunction.html" title="interface in org.apache.edgent.function"><code>getter</code></a> to extract the
  variable to aggregate.

  <p>If the collection is empty an empty ResultMap is returned.
  The ResultMap does not contain an entry for an aggregation with a null,
  e.g., a Regression2.SLOPE where the minimum number of samples has not been met.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - Tuple type</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>c</code> - the Collection to aggregate</dd>
 <dd><code>getter</code> - function that returns the variable to aggregate from a <code>T</code></dd>
 <dd><code>aggregates</code> - the aggregations to perform</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a <a href="../../../../../org/apache/edgent/analytics/math3/ResultMap.html" title="class in org.apache.edgent.analytics.math3"><code>ResultMap</code></a> containing the variable's aggregation results</dd>
 </dl>
 </li>
 </ul>
 </li>
 </ul>
 </li>
 </ul>
 </div>
 </div>
 <!-- ========= END OF CLASS DATA ========= -->
 <!-- ======= 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><a href="package-summary.html">Package</a></li>
 <li class="navBarCell1Rev">Class</li>
 <li><a href="class-use/Aggregations.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>Prev&nbsp;Class</li>
 <li><a href="../../../../../org/apache/edgent/analytics/math3/MvResultMap.html" title="class in org.apache.edgent.analytics.math3"><span class="typeNameLink">Next&nbsp;Class</span></a></li>
 </ul>
 <ul class="navList">
 <li><a href="../../../../../index.html?org/apache/edgent/analytics/math3/Aggregations.html" target="_top">Frames</a></li>
 <li><a href="Aggregations.html" target="_top">No&nbsp;Frames</a></li>
 </ul>
 <ul class="navList" id="allclasses_navbar_bottom">
 <li><a href="../../../../../allclasses-noframe.html">All&nbsp;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>
 <div>
 <ul class="subNavList">
 <li>Summary:&nbsp;</li>
 <li>Nested&nbsp;|&nbsp;</li>
 <li>Field&nbsp;|&nbsp;</li>
 <li><a href="#constructor.summary">Constr</a>&nbsp;|&nbsp;</li>
 <li><a href="#method.summary">Method</a></li>
 </ul>
 <ul class="subNavList">
 <li>Detail:&nbsp;</li>
 <li>Field&nbsp;|&nbsp;</li>
 <li><a href="#constructor.detail">Constr</a>&nbsp;|&nbsp;</li>
 <li><a href="#method.detail">Method</a></li>
 </ul>
 </div>
 <a name="skip.navbar.bottom">
 <!--   -->
 </a></div>
 <!-- ======== END OF BOTTOM NAVBAR ======= -->
 <p class="legalCopy"><small>Copyright &#169; 2016&#x2013;2017 <a href="https://www.apache.org/">The Apache Software Foundation</a>. All rights reserved.</small></p>
 </body>
 </html>