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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">com.djrapitops.plan.delivery.domain.mutators</a></div>
<h2 title="Class ActivityIndex" class="title">Class ActivityIndex</h2>
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<li>java.lang.Object</li>
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<pre>public class <span class="typeNameLabel">ActivityIndex</span>
extends java.lang.Object</pre>
<div class="block">Represents Activity index of a player at a certain date.
<p>
Old formula for activity index was not linear and difficult to turn into a query due to conditional multipliers.
Thus a new formula was written.
<p>
<code>T</code> - Time played after someone is considered active on a particular week
<code>t1, t2, t3</code> - Time played that week
<p>
Activity index takes into account last 3 weeks.
<p>
Activity for a single week is calculated using <code>A(t) = (1 / (pi/2 * (t/T) + 1))</code>.
A(t) is based on function f(x) = 1 / (x + 1), which has property f(0) = 1, decreasing from there, but not in a straight line.
You can see the function plotted here https://www.wolframalpha.com/input/?i=1+%2F+(x%2B1)+from+-1+to+2
<p>
To fine tune the curve pi/2 is used since it felt like a good curve.
<p>
Activity index A is calculated by using the formula:
<code>A = 5 - 5 * [A(t1) + A(t2) + A(t3)] / 3</code>
<p>
Plot for A and limits
https://www.wolframalpha.com/input/?i=plot+y+%3D+5+-+5+*+(1+%2F+(pi%2F2+*+x%2B1))+and+y+%3D1+and+y+%3D+2+and+y+%3D+3+and+y+%3D+3.75+from+-0.5+to+3
<p>
New Limits for A would thus be
<code>&lt; 1: Inactive</code>
<code>&gt; 1: Irregular</code>
<code>&gt; 2: Regular</code>
<code>&gt; 3: Active</code>
<code>&gt; 3.75: Very Active</code></div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
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<td class="colFirst"><code>static double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#ACTIVE">ACTIVE</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#IRREGULAR">IRREGULAR</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
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<td class="colFirst"><code>static double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#REGULAR">REGULAR</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
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<td class="colFirst"><code>static double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#VERY_ACTIVE">VERY_ACTIVE</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(double,long)">ActivityIndex</a></span>&#8203;(double&nbsp;value,
long&nbsp;date)</code></th>
<td class="colLast">&nbsp;</td>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(com.djrapitops.plan.delivery.domain.container.DataContainer,long,long)">ActivityIndex</a></span>&#8203;(<a href="../container/DataContainer.html" title="interface in com.djrapitops.plan.delivery.domain.container">DataContainer</a>&nbsp;container,
long&nbsp;date,
long&nbsp;playtimeMsThreshold)</code></th>
<td class="colLast">&nbsp;</td>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.util.List,long,long)">ActivityIndex</a></span>&#8203;(java.util.List&lt;<a href="../../../gathering/domain/FinishedSession.html" title="class in com.djrapitops.plan.gathering.domain">FinishedSession</a>&gt;&nbsp;sessions,
long&nbsp;date,
long&nbsp;playtimeMsThreshold)</code></th>
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<td class="colFirst"><code>double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#distance(com.djrapitops.plan.delivery.domain.mutators.ActivityIndex)">distance</a></span>&#8203;(<a href="ActivityIndex.html" title="class in com.djrapitops.plan.delivery.domain.mutators">ActivityIndex</a>&nbsp;other)</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDate()">getDate</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static java.lang.String[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDefaultGroups()">getDefaultGroups</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getFormattedValue(com.djrapitops.plan.delivery.formatting.Formatter)">getFormattedValue</a></span>&#8203;(<a href="../../formatting/Formatter.html" title="interface in com.djrapitops.plan.delivery.formatting">Formatter</a>&lt;java.lang.Double&gt;&nbsp;formatter)</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getGroup()">getGroup</a></span>()</code></th>
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<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getGroup(double)">getGroup</a></span>&#8203;(double&nbsp;value)</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getGroup(com.djrapitops.plan.settings.locale.Locale)">getGroup</a></span>&#8203;(<a href="../../../settings/locale/Locale.html" title="class in com.djrapitops.plan.settings.locale">Locale</a>&nbsp;locale)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>static java.lang.String[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getGroups(com.djrapitops.plan.settings.locale.Locale)">getGroups</a></span>&#8203;(<a href="../../../settings/locale/Locale.html" title="class in com.djrapitops.plan.settings.locale">Locale</a>&nbsp;locale)</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getValue()">getValue</a></span>()</code></th>
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<pre>public static final&nbsp;double VERY_ACTIVE</pre>
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<pre>public static final&nbsp;double ACTIVE</pre>
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<pre>public static final&nbsp;double REGULAR</pre>
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<pre>public static final&nbsp;double IRREGULAR</pre>
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<h4>ActivityIndex</h4>
<pre>public&nbsp;ActivityIndex&#8203;(<a href="../container/DataContainer.html" title="interface in com.djrapitops.plan.delivery.domain.container">DataContainer</a>&nbsp;container,
long&nbsp;date,
long&nbsp;playtimeMsThreshold)</pre>
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<h4>ActivityIndex</h4>
<pre>public&nbsp;ActivityIndex&#8203;(java.util.List&lt;<a href="../../../gathering/domain/FinishedSession.html" title="class in com.djrapitops.plan.gathering.domain">FinishedSession</a>&gt;&nbsp;sessions,
long&nbsp;date,
long&nbsp;playtimeMsThreshold)</pre>
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<pre>public&nbsp;ActivityIndex&#8203;(double&nbsp;value,
long&nbsp;date)</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String[]&nbsp;getDefaultGroups()</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String[]&nbsp;getGroups&#8203;(<a href="../../../settings/locale/Locale.html" title="class in com.djrapitops.plan.settings.locale">Locale</a>&nbsp;locale)</pre>
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<pre class="methodSignature">public&nbsp;long&nbsp;getDate()</pre>
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<h4>distance</h4>
<pre class="methodSignature">public&nbsp;double&nbsp;distance&#8203;(<a href="ActivityIndex.html" title="class in com.djrapitops.plan.delivery.domain.mutators">ActivityIndex</a>&nbsp;other)</pre>
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<pre class="methodSignature">public static&nbsp;java.lang.String&nbsp;getGroup&#8203;(double&nbsp;value)</pre>
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<pre class="methodSignature">public&nbsp;java.lang.String&nbsp;getGroup&#8203;(<a href="../../../settings/locale/Locale.html" title="class in com.djrapitops.plan.settings.locale">Locale</a>&nbsp;locale)</pre>
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