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<h2 title="Interface HeatMapDataset" class="title">Interface HeatMapDataset</h2>
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<pre>public interface <a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.50">HeatMapDataset</a></pre>
<div class="block">A dataset that represents a rectangular grid of (x, y, z) values.  The x
 and y values appear at regular intervals in the dataset, while the z-values
 can take any value (including <code>null</code> for unknown values).</div>
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<dd>1.0.13</dd>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMaximumXValue--">getMaximumXValue</a></span>()</code>
<div class="block">Returns the highest x-value represented in this dataset.</div>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMaximumYValue--">getMaximumYValue</a></span>()</code>
<div class="block">Returns the highest y-value represented in this dataset.</div>
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</tr>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMinimumXValue--">getMinimumXValue</a></span>()</code>
<div class="block">Returns the lowest x-value represented in this dataset.</div>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMinimumYValue--">getMinimumYValue</a></span>()</code>
<div class="block">Returns the lowest y-value represented in this dataset.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getXSampleCount--">getXSampleCount</a></span>()</code>
<div class="block">Returns the number of x values across the width of the dataset.</div>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getXValue-int-">getXValue</a></span>(int&nbsp;xIndex)</code>
<div class="block">A convenience method that returns the x-value for the given index.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getYSampleCount--">getYSampleCount</a></span>()</code>
<div class="block">Returns the number of y values (or samples) for the dataset.</div>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getYValue-int-">getYValue</a></span>(int&nbsp;yIndex)</code>
<div class="block">A convenience method that returns the y-value for the given index.</div>
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<td class="colFirst"><code>java.lang.Number</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getZ-int-int-">getZ</a></span>(int&nbsp;xIndex,
    int&nbsp;yIndex)</code>
<div class="block">Returns the z-value at the specified sample position in the dataset.</div>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/jfree/data/general/HeatMapDataset.html#getZValue-int-int-">getZValue</a></span>(int&nbsp;xIndex,
         int&nbsp;yIndex)</code>
<div class="block">Returns the z-value at the specified sample position in the dataset.</div>
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<h4>getXSampleCount</h4>
<pre>int&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.59">getXSampleCount</a>()</pre>
<div class="block">Returns the number of x values across the width of the dataset.  The
 values are evenly spaced between <a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMinimumXValue--"><code>getMinimumXValue()</code></a> and
 <a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMaximumXValue--"><code>getMaximumXValue()</code></a>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of x-values (always &gt; 0).</dd>
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<h4>getYSampleCount</h4>
<pre>int&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.68">getYSampleCount</a>()</pre>
<div class="block">Returns the number of y values (or samples) for the dataset.  The
 values are evenly spaced between <a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMinimumYValue--"><code>getMinimumYValue()</code></a> and
 <a href="../../../../org/jfree/data/general/HeatMapDataset.html#getMaximumYValue--"><code>getMaximumYValue()</code></a>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of y-values (always &gt; 0).</dd>
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<h4>getMinimumXValue</h4>
<pre>double&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.77">getMinimumXValue</a>()</pre>
<div class="block">Returns the lowest x-value represented in this dataset.  A requirement
 of this interface is that this method must never return infinite or
 Double.NAN values.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The lowest x-value represented in this dataset.</dd>
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<h4>getMaximumXValue</h4>
<pre>double&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.86">getMaximumXValue</a>()</pre>
<div class="block">Returns the highest x-value represented in this dataset.  A requirement
 of this interface is that this method must never return infinite or
 Double.NAN values.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The highest x-value represented in this dataset.</dd>
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<h4>getMinimumYValue</h4>
<pre>double&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.95">getMinimumYValue</a>()</pre>
<div class="block">Returns the lowest y-value represented in this dataset.  A requirement
 of this interface is that this method must never return infinite or
 Double.NAN values.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The lowest y-value represented in this dataset.</dd>
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<h4>getMaximumYValue</h4>
<pre>double&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.104">getMaximumYValue</a>()</pre>
<div class="block">Returns the highest y-value represented in this dataset.  A requirement
 of this interface is that this method must never return infinite or
 Double.NAN values.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The highest y-value represented in this dataset.</dd>
</dl>
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<h4>getXValue</h4>
<pre>double&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.113">getXValue</a>(int&nbsp;xIndex)</pre>
<div class="block">A convenience method that returns the x-value for the given index.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>xIndex</code> - the xIndex.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The x-value.</dd>
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<h4>getYValue</h4>
<pre>double&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.122">getYValue</a>(int&nbsp;yIndex)</pre>
<div class="block">A convenience method that returns the y-value for the given index.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>yIndex</code> - the yIndex.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The y-value.</dd>
</dl>
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<h4>getZValue</h4>
<pre>double&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.133">getZValue</a>(int&nbsp;xIndex,
                 int&nbsp;yIndex)</pre>
<div class="block">Returns the z-value at the specified sample position in the dataset.
 For a missing or unknown value, this method should return Double.NAN.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>xIndex</code> - the position of the x sample in the dataset.</dd>
<dd><code>yIndex</code> - the position of the y sample in the dataset.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The z-value.</dd>
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<h4>getZ</h4>
<pre>java.lang.Number&nbsp;<a href="../../../../src-html/org/jfree/data/general/HeatMapDataset.html#line.152">getZ</a>(int&nbsp;xIndex,
                      int&nbsp;yIndex)</pre>
<div class="block">Returns the z-value at the specified sample position in the dataset.
 This method can return <code>null</code> to indicate a missing/unknown
 value.
 <br><br>
 Bear in mind that the class implementing this interface may
 store its data using primitives rather than objects, so calling this
 method may require a new <code>Number</code> object to be allocated...
 for this reason, it is generally preferable to use the
 <a href="../../../../org/jfree/data/general/HeatMapDataset.html#getZValue-int-int-"><code>getZValue(int, int)</code></a> method unless you *know* that the dataset
 implementation stores the z-values using objects.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>xIndex</code> - the position of the x sample in the dataset.</dd>
<dd><code>yIndex</code> - the position of the y sample in the dataset.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The z-value (possibly <code>null</code>).</dd>
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