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<h1>QwtMatrixRasterData Class Reference</h1> </div>
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<!-- doxytag: class="QwtMatrixRasterData" --><!-- doxytag: inherits="QwtRasterData" -->
<p>A class representing a matrix of values as raster data.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="qwt__matrix__raster__data_8h_source.html">qwt_matrix_raster_data.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for QwtMatrixRasterData:</div>
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<map name="_qwt_matrix_raster_data_inherit__map" id="_qwt_matrix_raster_data_inherit__map">
<area shape="rect" id="node2" href="class_qwt_raster_data.html" title="QwtRasterData defines an interface to any type of raster data." alt="" coords="24,5,133,35"/></map>
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<p><a href="class_qwt_matrix_raster_data-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_raster_data.html#ac0053b66315fde6f0a9a69c40d7c5dcc">ConrecFlag</a> { <br/>
  <a class="el" href="class_qwt_raster_data.html#ac0053b66315fde6f0a9a69c40d7c5dccafd2f6337e825201a247408f033713c92">IgnoreAllVerticesOnLevel</a> = 0x01,
<br/>
  <a class="el" href="class_qwt_raster_data.html#ac0053b66315fde6f0a9a69c40d7c5dcca18e8d1de171dd43cc957c279eb03d32c">IgnoreOutOfRange</a> = 0x02
<br/>
}</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef QFlags< <a class="el" href="class_qwt_raster_data.html#ac0053b66315fde6f0a9a69c40d7c5dcc">ConrecFlag</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_raster_data.html#a8101f4a0c71813d49fcdc73a457c4874">ConrecFlags</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef QMap< double, QPolygonF > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_raster_data.html#adc6679160a229992f0870a2b784985f3">ContourLines</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209">ResampleMode</a> { <br/>
  <a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209acaa0a9e3b8afd376472d6a587a3f9873">NearestNeighbour</a>,
<br/>
  <a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209a6f25a9f1f27cb94525ce39df487af13f">BilinearInterpolation</a>
<br/>
}</td></tr>
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_qwt_raster_data.html#adc6679160a229992f0870a2b784985f3">ContourLines</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_raster_data.html#a1fa90434ddeeeeaacb80657e49af8fe1">contourLines</a> (const QRectF &rect, const QSize &raster, const QList< double > &levels, <a class="el" href="class_qwt_raster_data.html#a8101f4a0c71813d49fcdc73a457c4874">ConrecFlags</a>) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_raster_data.html#a369a5f525814bf569e01f88fbd8ddb5b">discardRaster</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_raster_data.html#a64f5bf40b6138cc66719a56555c03589">initRaster</a> (const QRectF &, const QSize &raster)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_raster_data.html#a8423d051697f975150b3b555bfcac8b9">interval</a> (Qt::Axis) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#ab9554c0c132f8a5a7ce6bc2baea37b14">numColumns</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#ace0953054ec4ea6f4861e68cb9023ccd">numRows</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QRectF </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a7a9034de8037af500e4f737f54591358">pixelHint</a> (const QRectF &) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a3e80514459cc6aab03cfd839da53e45e">QwtMatrixRasterData</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209">ResampleMode</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#af4edef83d2862640893552b8f20ed725">resampleMode</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a69db38d8f920edb9dc3f0953ca16db8f">setInterval</a> (Qt::Axis, const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a038effe6e4be13725b7a8d35370595fd">setResampleMode</a> (<a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209">ResampleMode</a> mode)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a9520b89815edd800e65cd13ebd4677a3">setValueMatrix</a> (const QVector< double > &values, size_t numColumns)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a49952670063166bccdbfb9cdbd7b56e8">value</a> (double x, double y) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector< double > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a001d575e77cf90c29ec8c5a6f8656946">valueMatrix</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_matrix_raster_data.html#a15284284966f25383fe67f2e278f4869">~QwtMatrixRasterData</a> ()</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>A class representing a matrix of values as raster data. </p>
<p><a class="el" href="class_qwt_matrix_raster_data.html" title="A class representing a matrix of values as raster data.">QwtMatrixRasterData</a> implements an interface for a matrix of equidistant values, that can be used by a <a class="el" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a>. It implements a couple of resampling algorithms, to provide values for positions, that or not on the value matrix. </p>
</div><hr/><h2>Member Typedef Documentation</h2>
<a class="anchor" id="a8101f4a0c71813d49fcdc73a457c4874"></a><!-- doxytag: member="QwtMatrixRasterData::ConrecFlags" ref="a8101f4a0c71813d49fcdc73a457c4874" args="" -->
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<td class="memname">typedef QFlags<<a class="el" href="class_qwt_raster_data.html#ac0053b66315fde6f0a9a69c40d7c5dcc">ConrecFlag</a>> <a class="el" href="class_qwt_raster_data.html#a8101f4a0c71813d49fcdc73a457c4874">QwtRasterData::ConrecFlags</a><code> [inherited]</code></td>
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<p>Flags to modify the contour algorithm. </p>
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<a class="anchor" id="adc6679160a229992f0870a2b784985f3"></a><!-- doxytag: member="QwtMatrixRasterData::ContourLines" ref="adc6679160a229992f0870a2b784985f3" args="" -->
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<td class="memname">typedef QMap<double, QPolygonF> <a class="el" href="class_qwt_raster_data.html#adc6679160a229992f0870a2b784985f3">QwtRasterData::ContourLines</a><code> [inherited]</code></td>
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<p>Contour lines. </p>
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<hr/><h2>Member Enumeration Documentation</h2>
<a class="anchor" id="ac0053b66315fde6f0a9a69c40d7c5dcc"></a><!-- doxytag: member="QwtMatrixRasterData::ConrecFlag" ref="ac0053b66315fde6f0a9a69c40d7c5dcc" args="" -->
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<td class="memname">enum <a class="el" href="class_qwt_raster_data.html#ac0053b66315fde6f0a9a69c40d7c5dcc">QwtRasterData::ConrecFlag</a><code> [inherited]</code></td>
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<p>Flags to modify the contour algorithm. </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="ac0053b66315fde6f0a9a69c40d7c5dccafd2f6337e825201a247408f033713c92"></a><!-- doxytag: member="IgnoreAllVerticesOnLevel" ref="ac0053b66315fde6f0a9a69c40d7c5dccafd2f6337e825201a247408f033713c92" args="" -->IgnoreAllVerticesOnLevel</em> </td><td>
<p>Ignore all verices on the same level. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ac0053b66315fde6f0a9a69c40d7c5dcca18e8d1de171dd43cc957c279eb03d32c"></a><!-- doxytag: member="IgnoreOutOfRange" ref="ac0053b66315fde6f0a9a69c40d7c5dcca18e8d1de171dd43cc957c279eb03d32c" args="" -->IgnoreOutOfRange</em> </td><td>
<p>Ignore all values, that are out of range. </p>
</td></tr>
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</dd>
</dl>
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<a class="anchor" id="a3c8def5d9ae452bd82e6c4b71b480209"></a><!-- doxytag: member="QwtMatrixRasterData::ResampleMode" ref="a3c8def5d9ae452bd82e6c4b71b480209" args="" -->
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<td class="memname">enum <a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209">QwtMatrixRasterData::ResampleMode</a></td>
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<p>Resampling algorithm The default setting is NearestNeighbour;. </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="a3c8def5d9ae452bd82e6c4b71b480209acaa0a9e3b8afd376472d6a587a3f9873"></a><!-- doxytag: member="NearestNeighbour" ref="a3c8def5d9ae452bd82e6c4b71b480209acaa0a9e3b8afd376472d6a587a3f9873" args="" -->NearestNeighbour</em> </td><td>
<p>Return the value from the matrix, that is nearest to the the requested position. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="a3c8def5d9ae452bd82e6c4b71b480209a6f25a9f1f27cb94525ce39df487af13f"></a><!-- doxytag: member="BilinearInterpolation" ref="a3c8def5d9ae452bd82e6c4b71b480209a6f25a9f1f27cb94525ce39df487af13f" args="" -->BilinearInterpolation</em> </td><td>
<p>Interpolate the value from the distances and values of the 4 surrounding values in the matrix, </p>
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</dd>
</dl>
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<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a3e80514459cc6aab03cfd839da53e45e"></a><!-- doxytag: member="QwtMatrixRasterData::QwtMatrixRasterData" ref="a3e80514459cc6aab03cfd839da53e45e" args="()" -->
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<td class="memname">QwtMatrixRasterData::QwtMatrixRasterData </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<p>Constructor. </p>
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<a class="anchor" id="a15284284966f25383fe67f2e278f4869"></a><!-- doxytag: member="QwtMatrixRasterData::~QwtMatrixRasterData" ref="a15284284966f25383fe67f2e278f4869" args="()" -->
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<td class="memname">QwtMatrixRasterData::~QwtMatrixRasterData </td>
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<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
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<p>Destructor. </p>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a1fa90434ddeeeeaacb80657e49af8fe1"></a><!-- doxytag: member="QwtMatrixRasterData::contourLines" ref="a1fa90434ddeeeeaacb80657e49af8fe1" args="(const QRectF &rect, const QSize &raster, const QList< double > &levels, ConrecFlags) const " -->
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<td class="memname"><a class="el" href="class_qwt_raster_data.html#adc6679160a229992f0870a2b784985f3">QwtRasterData::ContourLines</a> QwtRasterData::contourLines </td>
<td>(</td>
<td class="paramtype">const QRectF & </td>
<td class="paramname"><em>rect</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const QSize & </td>
<td class="paramname"><em>raster</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const QList< double > & </td>
<td class="paramname"><em>levels</em>, </td>
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<td class="paramtype"><a class="el" href="class_qwt_raster_data.html#a8101f4a0c71813d49fcdc73a457c4874">ConrecFlags</a> </td>
<td class="paramname"><em>flags</em> </td>
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<td>)</td>
<td></td><td> const<code> [virtual, inherited]</code></td>
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<p>Calculate contour lines</p>
<p>An adaption of CONREC, a simple contouring algorithm. <a href="http://local.wasp.uwa.edu.au/~pbourke/papers/conrec/">http://local.wasp.uwa.edu.au/~pbourke/papers/conrec/</a> </p>
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<a class="anchor" id="a369a5f525814bf569e01f88fbd8ddb5b"></a><!-- doxytag: member="QwtMatrixRasterData::discardRaster" ref="a369a5f525814bf569e01f88fbd8ddb5b" args="()" -->
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<td class="memname">void QwtRasterData::discardRaster </td>
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<td><code> [virtual, inherited]</code></td>
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<p>Discard a raster. </p>
<p>After the composition of an image <a class="el" href="class_qwt_plot_spectrogram.html" title="A plot item, which displays a spectrogram.">QwtPlotSpectrogram</a> calls <a class="el" href="class_qwt_raster_data.html#a369a5f525814bf569e01f88fbd8ddb5b" title="Discard a raster.">discardRaster()</a>.</p>
<p>The default implementation does nothing, but if data has been loaded in <a class="el" href="class_qwt_raster_data.html#a64f5bf40b6138cc66719a56555c03589" title="Initialize a raster.">initRaster()</a>, it could deleted now.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_raster_data.html#a64f5bf40b6138cc66719a56555c03589" title="Initialize a raster.">initRaster()</a>, <a class="el" href="class_qwt_raster_data.html#a6396fc013fcec893b1e8cea4cf03691e">value()</a> </dd></dl>
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<a class="anchor" id="a64f5bf40b6138cc66719a56555c03589"></a><!-- doxytag: member="QwtMatrixRasterData::initRaster" ref="a64f5bf40b6138cc66719a56555c03589" args="(const QRectF &, const QSize &raster)" -->
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<td class="memname">void QwtRasterData::initRaster </td>
<td>(</td>
<td class="paramtype">const QRectF & </td>
<td class="paramname"><em>area</em>, </td>
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<td class="paramtype">const QSize & </td>
<td class="paramname"><em>raster</em> </td>
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<td>)</td>
<td></td><td><code> [virtual, inherited]</code></td>
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<p>Initialize a raster. </p>
<p>Before the composition of an image <a class="el" href="class_qwt_plot_spectrogram.html" title="A plot item, which displays a spectrogram.">QwtPlotSpectrogram</a> calls initRaster, announcing the area and its resolution that will be requested.</p>
<p>The default implementation does nothing, but for data sets that are stored in files, it might be good idea to reimplement initRaster, where the data is resampled and loaded into memory.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">area</td><td>Area of the raster </td></tr>
<tr><td class="paramname">raster</td><td>Number of horizontal and vertical pixels</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_raster_data.html#a64f5bf40b6138cc66719a56555c03589" title="Initialize a raster.">initRaster()</a>, <a class="el" href="class_qwt_raster_data.html#a6396fc013fcec893b1e8cea4cf03691e">value()</a> </dd></dl>
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<a class="anchor" id="a8423d051697f975150b3b555bfcac8b9"></a><!-- doxytag: member="QwtMatrixRasterData::interval" ref="a8423d051697f975150b3b555bfcac8b9" args="(Qt::Axis) const " -->
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<td class="memname">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & QwtRasterData::interval </td>
<td>(</td>
<td class="paramtype">Qt::Axis </td>
<td class="paramname"><em>axis</em></td><td>)</td>
<td> const<code> [inline, inherited]</code></td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Bounding interval for a axis </dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_raster_data.html#a14abf60573989e2a2c97e21a98aee558">setInterval</a> </dd></dl>
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<a class="anchor" id="ab9554c0c132f8a5a7ce6bc2baea37b14"></a><!-- doxytag: member="QwtMatrixRasterData::numColumns" ref="ab9554c0c132f8a5a7ce6bc2baea37b14" args="() const " -->
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<td class="memname">size_t QwtMatrixRasterData::numColumns </td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Number of columns of the value matrix </dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#a001d575e77cf90c29ec8c5a6f8656946">valueMatrix()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#ace0953054ec4ea6f4861e68cb9023ccd">numRows()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#a9520b89815edd800e65cd13ebd4677a3" title="Assign a value matrix.">setValueMatrix()</a> </dd></dl>
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<a class="anchor" id="ace0953054ec4ea6f4861e68cb9023ccd"></a><!-- doxytag: member="QwtMatrixRasterData::numRows" ref="ace0953054ec4ea6f4861e68cb9023ccd" args="() const " -->
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<td class="memname">size_t QwtMatrixRasterData::numRows </td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Number of rows of the value matrix </dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#a001d575e77cf90c29ec8c5a6f8656946">valueMatrix()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#ab9554c0c132f8a5a7ce6bc2baea37b14">numColumns()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#a9520b89815edd800e65cd13ebd4677a3" title="Assign a value matrix.">setValueMatrix()</a> </dd></dl>
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<a class="anchor" id="a7a9034de8037af500e4f737f54591358"></a><!-- doxytag: member="QwtMatrixRasterData::pixelHint" ref="a7a9034de8037af500e4f737f54591358" args="(const QRectF &) const " -->
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<td class="memname">QRectF QwtMatrixRasterData::pixelHint </td>
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<td class="paramtype">const QRectF & </td>
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<p>Pixel hint. </p>
<ul>
<li>NearestNeighbour<br/>
<a class="el" href="class_qwt_matrix_raster_data.html#a7a9034de8037af500e4f737f54591358" title="Pixel hint.">pixelHint()</a> returns the surrounding pixel of the top left value in the matrix.</li>
</ul>
<ul>
<li>BilinearInterpolation<br/>
Returns an empty rectangle recommending to render in target device ( f.e. screen ) resolution.</li>
</ul>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209" title="Resampling algorithm The default setting is NearestNeighbour;.">ResampleMode</a>, setMatrix(), <a class="el" href="class_qwt_matrix_raster_data.html#a69db38d8f920edb9dc3f0953ca16db8f" title="Assign the bounding interval for an axis.">setInterval()</a> </dd></dl>
<p>Reimplemented from <a class="el" href="class_qwt_raster_data.html#ad1ce58351804760d1ba1e7efe97d39d6">QwtRasterData</a>.</p>
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<a class="anchor" id="af4edef83d2862640893552b8f20ed725"></a><!-- doxytag: member="QwtMatrixRasterData::resampleMode" ref="af4edef83d2862640893552b8f20ed725" args="() const " -->
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<td class="memname"><a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209">QwtMatrixRasterData::ResampleMode</a> QwtMatrixRasterData::resampleMode </td>
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<td> const</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>resampling algorithm </dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#a038effe6e4be13725b7a8d35370595fd" title="Set the resampling algorithm.">setResampleMode()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#a49952670063166bccdbfb9cdbd7b56e8">value()</a> </dd></dl>
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<a class="anchor" id="a69db38d8f920edb9dc3f0953ca16db8f"></a><!-- doxytag: member="QwtMatrixRasterData::setInterval" ref="a69db38d8f920edb9dc3f0953ca16db8f" args="(Qt::Axis, const QwtInterval &)" -->
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<td class="memname">void QwtMatrixRasterData::setInterval </td>
<td>(</td>
<td class="paramtype">Qt::Axis </td>
<td class="paramname"><em>axis</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em> </td>
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<td></td>
<td>)</td>
<td></td><td><code> [virtual]</code></td>
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<p>Assign the bounding interval for an axis. </p>
<p>Setting the bounding intervals for the X/Y axis is mandatory to define the positions for the values of the value matrix. The interval in Z direction defines the possible range for the values in the matrix, what is f.e used by <a class="el" href="class_qwt_plot_spectrogram.html" title="A plot item, which displays a spectrogram.">QwtPlotSpectrogram</a> to map values to colors. The Z-interval might be the bounding interval of the values in the matrix, but usually it isn't. ( f.e a interval of 0.0-100.0 for values in percentage )</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">axis</td><td>X, Y or Z axis </td></tr>
<tr><td class="paramname">interval</td><td>Interval</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_raster_data.html#a8423d051697f975150b3b555bfcac8b9">QwtRasterData::interval()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#a9520b89815edd800e65cd13ebd4677a3" title="Assign a value matrix.">setValueMatrix()</a> </dd></dl>
<p>Reimplemented from <a class="el" href="class_qwt_raster_data.html#a14abf60573989e2a2c97e21a98aee558">QwtRasterData</a>.</p>
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<a class="anchor" id="a038effe6e4be13725b7a8d35370595fd"></a><!-- doxytag: member="QwtMatrixRasterData::setResampleMode" ref="a038effe6e4be13725b7a8d35370595fd" args="(ResampleMode mode)" -->
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<td class="memname">void QwtMatrixRasterData::setResampleMode </td>
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<td class="paramtype"><a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209">ResampleMode</a> </td>
<td class="paramname"><em>mode</em></td><td>)</td>
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<p>Set the resampling algorithm. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">mode</td><td>Resampling mode </td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#af4edef83d2862640893552b8f20ed725">resampleMode()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#a49952670063166bccdbfb9cdbd7b56e8">value()</a> </dd></dl>
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<a class="anchor" id="a9520b89815edd800e65cd13ebd4677a3"></a><!-- doxytag: member="QwtMatrixRasterData::setValueMatrix" ref="a9520b89815edd800e65cd13ebd4677a3" args="(const QVector< double > &values, size_t numColumns)" -->
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<td class="memname">void QwtMatrixRasterData::setValueMatrix </td>
<td>(</td>
<td class="paramtype">const QVector< double > & </td>
<td class="paramname"><em>values</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>numColumns</em> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Assign a value matrix. </p>
<p>The positions of the values are calculated by dividing the bounding rectangle of the X/Y intervals into equidistant rectangles ( pixels ). Each value corresponds to the center of a pixel.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">values</td><td>Vector of values </td></tr>
<tr><td class="paramname">numColumns</td><td>Number of columns</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#a001d575e77cf90c29ec8c5a6f8656946">valueMatrix()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#ab9554c0c132f8a5a7ce6bc2baea37b14">numColumns()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#ace0953054ec4ea6f4861e68cb9023ccd">numRows()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#a69db38d8f920edb9dc3f0953ca16db8f" title="Assign the bounding interval for an axis.">setInterval()</a>() </dd></dl>
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<a class="anchor" id="a49952670063166bccdbfb9cdbd7b56e8"></a><!-- doxytag: member="QwtMatrixRasterData::value" ref="a49952670063166bccdbfb9cdbd7b56e8" args="(double x, double y) const " -->
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<td class="memname">double QwtMatrixRasterData::value </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>y</em> </td>
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<td></td>
<td>)</td>
<td></td><td> const<code> [virtual]</code></td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>the value at a raster position</dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">x</td><td>X value in plot coordinates </td></tr>
<tr><td class="paramname">y</td><td>Y value in plot coordinates</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#a3c8def5d9ae452bd82e6c4b71b480209" title="Resampling algorithm The default setting is NearestNeighbour;.">ResampleMode</a> </dd></dl>
<p>Implements <a class="el" href="class_qwt_raster_data.html#a6396fc013fcec893b1e8cea4cf03691e">QwtRasterData</a>.</p>
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<a class="anchor" id="a001d575e77cf90c29ec8c5a6f8656946"></a><!-- doxytag: member="QwtMatrixRasterData::valueMatrix" ref="a001d575e77cf90c29ec8c5a6f8656946" args="() const " -->
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<td class="memname">const QVector< double > QwtMatrixRasterData::valueMatrix </td>
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<td> const</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Value matrix </dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_matrix_raster_data.html#a9520b89815edd800e65cd13ebd4677a3" title="Assign a value matrix.">setValueMatrix()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#ab9554c0c132f8a5a7ce6bc2baea37b14">numColumns()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#ace0953054ec4ea6f4861e68cb9023ccd">numRows()</a>, <a class="el" href="class_qwt_matrix_raster_data.html#a69db38d8f920edb9dc3f0953ca16db8f" title="Assign the bounding interval for an axis.">setInterval()</a> </dd></dl>
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