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<title>QCPAxisTickerLog Class Reference</title>
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<a href="#pub-methods">Public Functions</a> |
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<div class="title">QCPAxisTickerLog Class Reference</div> </div>
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<p>Specialized axis ticker suited for logarithmic axes.
<a href="classQCPAxisTickerLog.html#details">More...</a></p>
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Inheritance diagram for QCPAxisTickerLog:</div>
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<div class="center"><img src="classQCPAxisTickerLog__inherit__graph.png" border="0" usemap="#QCPAxisTickerLog_inherit__map" alt="Inheritance graph"/></div>
<map name="QCPAxisTickerLog_inherit__map" id="QCPAxisTickerLog_inherit__map">
<area shape="rect" id="node2" href="classQCPAxisTicker.html" title="The base class tick generator used by QCPAxis to create tick positions and tick labels. " alt="" coords="15,5,117,29"/>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Functions</h2></td></tr>
<tr class="memitem:af3cb86ea5eef2023c0b96b5260c4cbdf"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTickerLog.html#af3cb86ea5eef2023c0b96b5260c4cbdf">QCPAxisTickerLog</a> ()</td></tr>
<tr class="separator:af3cb86ea5eef2023c0b96b5260c4cbdf"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a841a97f2b6850ff1ef3aa73e89d94775"><td class="memItemLeft" align="right" valign="top"><a id="a841a97f2b6850ff1ef3aa73e89d94775"></a>
double </td><td class="memItemRight" valign="bottom"><b>logBase</b> () const</td></tr>
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<tr class="memitem:aebe43661977364fc1fd220fa1ae36a10"><td class="memItemLeft" align="right" valign="top"><a id="aebe43661977364fc1fd220fa1ae36a10"></a>
int </td><td class="memItemRight" valign="bottom"><b>subTickCount</b> () const</td></tr>
<tr class="separator:aebe43661977364fc1fd220fa1ae36a10"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac6e3b4e03baea3816f898869ab9751ef"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTickerLog.html#ac6e3b4e03baea3816f898869ab9751ef">setLogBase</a> (double base)</td></tr>
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<tr class="memitem:ad51989c798c0cfd50936d77aac57c56a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTickerLog.html#ad51989c798c0cfd50936d77aac57c56a">setSubTickCount</a> (int subTicks)</td></tr>
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<tr class="inherit_header pub_methods_classQCPAxisTicker"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classQCPAxisTicker')"><img src="closed.png" alt="-"/> Public Functions inherited from <a class="el" href="classQCPAxisTicker.html">QCPAxisTicker</a></td></tr>
<tr class="memitem:a8fcf23c79ebd72202fe79253f9f01ea8 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a8fcf23c79ebd72202fe79253f9f01ea8">QCPAxisTicker</a> ()</td></tr>
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<tr class="memitem:a58df76f2ec3eb48401bdd314b0e14ba1 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top"><a id="a58df76f2ec3eb48401bdd314b0e14ba1"></a>
<a class="el" href="classQCPAxisTicker.html#ab6d2f9d9477821623ac9bc4b21ddf49a">TickStepStrategy</a> </td><td class="memItemRight" valign="bottom"><b>tickStepStrategy</b> () const</td></tr>
<tr class="separator:a58df76f2ec3eb48401bdd314b0e14ba1 inherit pub_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aaf9edbe4169ce55e216fd067cc139452 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top"><a id="aaf9edbe4169ce55e216fd067cc139452"></a>
int </td><td class="memItemRight" valign="bottom"><b>tickCount</b> () const</td></tr>
<tr class="separator:aaf9edbe4169ce55e216fd067cc139452 inherit pub_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac0c6e9587c36fdeefb5518c00fe7ab15 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top"><a id="ac0c6e9587c36fdeefb5518c00fe7ab15"></a>
double </td><td class="memItemRight" valign="bottom"><b>tickOrigin</b> () const</td></tr>
<tr class="separator:ac0c6e9587c36fdeefb5518c00fe7ab15 inherit pub_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a73b1d847c1a12159af6bfda4ebebe7d5 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a73b1d847c1a12159af6bfda4ebebe7d5">setTickStepStrategy</a> (<a class="el" href="classQCPAxisTicker.html#ab6d2f9d9477821623ac9bc4b21ddf49a">TickStepStrategy</a> strategy)</td></tr>
<tr class="separator:a73b1d847c1a12159af6bfda4ebebe7d5 inherit pub_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a47752abba8293e6dc18491501ae34008 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a47752abba8293e6dc18491501ae34008">setTickCount</a> (int count)</td></tr>
<tr class="separator:a47752abba8293e6dc18491501ae34008 inherit pub_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab509c7e500293bf66a8409f0d7c23943 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#ab509c7e500293bf66a8409f0d7c23943">setTickOrigin</a> (double origin)</td></tr>
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<tr class="memitem:aefbd11725678ca824add8cf926cbc856 inherit pub_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#aefbd11725678ca824add8cf926cbc856">generate</a> (const <a class="el" href="classQCPRange.html">QCPRange</a> &range, const QLocale &locale, QChar formatChar, int precision, QVector< double > &ticks, QVector< double > *subTicks, QVector< QString > *tickLabels)</td></tr>
<tr class="separator:aefbd11725678ca824add8cf926cbc856 inherit pub_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Functions</h2></td></tr>
<tr class="memitem:a6e7fa635aaceadb7dd7f639dd313fe7e"><td class="memItemLeft" align="right" valign="top">virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTickerLog.html#a6e7fa635aaceadb7dd7f639dd313fe7e">getTickStep</a> (const <a class="el" href="classQCPRange.html">QCPRange</a> &range)</td></tr>
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<tr class="memitem:a562e859bad12ba5d3d849d41c9ab363a"><td class="memItemLeft" align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTickerLog.html#a562e859bad12ba5d3d849d41c9ab363a">getSubTickCount</a> (double tickStep)</td></tr>
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<tr class="memitem:a263d7651f3346f57e760dcda405e5660"><td class="memItemLeft" align="right" valign="top">virtual QVector< double > </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTickerLog.html#a263d7651f3346f57e760dcda405e5660">createTickVector</a> (double tickStep, const <a class="el" href="classQCPRange.html">QCPRange</a> &range)</td></tr>
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<tr class="inherit_header pro_methods_classQCPAxisTicker"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_classQCPAxisTicker')"><img src="closed.png" alt="-"/> Protected Functions inherited from <a class="el" href="classQCPAxisTicker.html">QCPAxisTicker</a></td></tr>
<tr class="memitem:a8201eb4aa8be192bf786b126eb5ee089 inherit pro_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">virtual QString </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a8201eb4aa8be192bf786b126eb5ee089">getTickLabel</a> (double tick, const QLocale &locale, QChar formatChar, int precision)</td></tr>
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<tr class="memitem:a9a6435723fa0bd366d1ea4c2cff7c33f inherit pro_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">virtual QVector< double > </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a9a6435723fa0bd366d1ea4c2cff7c33f">createSubTickVector</a> (int subTickCount, const QVector< double > &ticks)</td></tr>
<tr class="separator:a9a6435723fa0bd366d1ea4c2cff7c33f inherit pro_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a804050e408f37a0b9770c6654ebe6aa7 inherit pro_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">virtual QVector< QString > </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a804050e408f37a0b9770c6654ebe6aa7">createLabelVector</a> (const QVector< double > &ticks, const QLocale &locale, QChar formatChar, int precision)</td></tr>
<tr class="separator:a804050e408f37a0b9770c6654ebe6aa7 inherit pro_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab28cc1ab549489be7975f5ce7e717916 inherit pro_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#ab28cc1ab549489be7975f5ce7e717916">trimTicks</a> (const <a class="el" href="classQCPRange.html">QCPRange</a> &range, QVector< double > &ticks, bool keepOneOutlier) const</td></tr>
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<tr class="memitem:a4ea0a7c4ca1c610f92b9bd5944ab4260 inherit pro_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a4ea0a7c4ca1c610f92b9bd5944ab4260">pickClosest</a> (double target, const QVector< double > &candidates) const</td></tr>
<tr class="separator:a4ea0a7c4ca1c610f92b9bd5944ab4260 inherit pro_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2f1e223bafbf2cec7c3ba8b08d5c77e8 inherit pro_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#a2f1e223bafbf2cec7c3ba8b08d5c77e8">getMantissa</a> (double input, double *magnitude=0) const</td></tr>
<tr class="separator:a2f1e223bafbf2cec7c3ba8b08d5c77e8 inherit pro_methods_classQCPAxisTicker"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac7df6c72876b7abd67c932663a0b0f6a inherit pro_methods_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#ac7df6c72876b7abd67c932663a0b0f6a">cleanMantissa</a> (double input) const</td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pub_types_classQCPAxisTicker"><td colspan="2" onclick="javascript:toggleInherit('pub_types_classQCPAxisTicker')"><img src="closed.png" alt="-"/> Public Types inherited from <a class="el" href="classQCPAxisTicker.html">QCPAxisTicker</a></td></tr>
<tr class="memitem:ab6d2f9d9477821623ac9bc4b21ddf49a inherit pub_types_classQCPAxisTicker"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAxisTicker.html#ab6d2f9d9477821623ac9bc4b21ddf49a">TickStepStrategy</a> </td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Specialized axis ticker suited for logarithmic axes. </p>
<div class="image">
<img src="axisticker-log.png" alt="axisticker-log.png"/>
</div>
<p>This <a class="el" href="classQCPAxisTicker.html" title="The base class tick generator used by QCPAxis to create tick positions and tick labels. ">QCPAxisTicker</a> subclass generates ticks with unequal tick intervals suited for logarithmic axis scales. The ticks are placed at powers of the specified log base (<a class="el" href="classQCPAxisTickerLog.html#ac6e3b4e03baea3816f898869ab9751ef">setLogBase</a>).</p>
<p>Especially in the case of a log base equal to 10 (the default), it might be desirable to have tick labels in the form of powers of ten without mantissa display. To achieve this, set the number precision (<a class="el" href="classQCPAxis.html#a21dc8023ad7500382ad9574b48137e63">QCPAxis::setNumberPrecision</a>) to zero and the number format (<a class="el" href="classQCPAxis.html#ae585a54dc2aac662e90a2ca82f002590">QCPAxis::setNumberFormat</a>) to scientific (exponential) display with beautifully typeset decimal powers, so a format string of <code>"eb"</code>. This will result in the following axis tick labels:</p>
<div class="image">
<img src="axisticker-log-powers.png" alt="axisticker-log-powers.png"/>
</div>
<p>The ticker can be created and assigned to an axis like this: </p><div class="fragment"><div class="line"> QSharedPointer<QCPAxisTickerLog> logTicker(<span class="keyword">new</span> <a class="code" href="classQCPAxisTickerLog.html">QCPAxisTickerLog</a>);</div><div class="line"> customPlot->xAxis->setTicker(logTicker);</div><div class="line"> <span class="comment">// don't forget to also set the scale type accordingly, otherwise you'll have</span></div><div class="line"> <span class="comment">// logarithmically spaced ticks on a linear axis:</span></div><div class="line"> customPlot->xAxis->setScaleType(<a class="code" href="classQCPAxis.html#a36d8e8658dbaa179bf2aeb973db2d6f0abf5b785ad976618816dc6f79b73216d4">QCPAxis::stLogarithmic</a>);</div></div><!-- fragment --></div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="af3cb86ea5eef2023c0b96b5260c4cbdf"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af3cb86ea5eef2023c0b96b5260c4cbdf">§ </a></span>QCPAxisTickerLog()</h2>
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<td class="memname">QCPAxisTickerLog::QCPAxisTickerLog </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<p>Constructs the ticker and sets reasonable default values. Axis tickers are commonly created managed by a QSharedPointer, which then can be passed to <a class="el" href="classQCPAxis.html#a4ee03fcd2c74d05cd1a419b9af5cfbdc">QCPAxis::setTicker</a>. </p>
</div>
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<h2 class="groupheader">Member Function Documentation</h2>
<a id="ac6e3b4e03baea3816f898869ab9751ef"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac6e3b4e03baea3816f898869ab9751ef">§ </a></span>setLogBase()</h2>
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<td class="memname">void QCPAxisTickerLog::setLogBase </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>base</em></td><td>)</td>
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<p>Sets the logarithm base used for tick coordinate generation. The ticks will be placed at integer powers of <em>base</em>. </p>
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<a id="ad51989c798c0cfd50936d77aac57c56a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad51989c798c0cfd50936d77aac57c56a">§ </a></span>setSubTickCount()</h2>
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<td class="memname">void QCPAxisTickerLog::setSubTickCount </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>subTicks</em></td><td>)</td>
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<p>Sets the number of sub ticks in a tick interval. Within each interval, the sub ticks are spaced linearly to provide a better visual guide, so the sub tick density increases toward the higher tick.</p>
<p>Note that <em>subTicks</em> is the number of sub ticks (not sub intervals) in one tick interval. So in the case of logarithm base 10 an intuitive sub tick spacing would be achieved with eight sub ticks (the default). This means e.g. between the ticks 10 and 100 there will be eight ticks, namely at 20, 30, 40, 50, 60, 70, 80 and 90. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a6e7fa635aaceadb7dd7f639dd313fe7e">§ </a></span>getTickStep()</h2>
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<td class="memname">double QCPAxisTickerLog::getTickStep </td>
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<td class="paramtype">const <a class="el" href="classQCPRange.html">QCPRange</a> & </td>
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<p>Since logarithmic tick steps are necessarily different for each tick interval, this method does nothing in the case of <a class="el" href="classQCPAxisTickerLog.html" title="Specialized axis ticker suited for logarithmic axes. ">QCPAxisTickerLog</a></p>
<p>For general information about this virtual method, see the base class implementation. </p>
<p>Reimplemented from <a class="el" href="classQCPAxisTicker.html#a910d69bcec2de37e92d8d4e1ecf201e2">QCPAxisTicker</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a562e859bad12ba5d3d849d41c9ab363a">§ </a></span>getSubTickCount()</h2>
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<td class="memname">int QCPAxisTickerLog::getSubTickCount </td>
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<p>Returns the sub tick count specified in <a class="el" href="classQCPAxisTickerLog.html#ad51989c798c0cfd50936d77aac57c56a">setSubTickCount</a>. For <a class="el" href="classQCPAxisTickerLog.html" title="Specialized axis ticker suited for logarithmic axes. ">QCPAxisTickerLog</a>, there is no automatic sub tick count calculation necessary.</p>
<p>For general information about this virtual method, see the base class implementation. </p>
<p>Reimplemented from <a class="el" href="classQCPAxisTicker.html#a4ccc403ced7a1457ce6ba293509933c8">QCPAxisTicker</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a263d7651f3346f57e760dcda405e5660">§ </a></span>createTickVector()</h2>
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<td class="memname">QVector< double > QCPAxisTickerLog::createTickVector </td>
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<td class="paramtype">const <a class="el" href="classQCPRange.html">QCPRange</a> & </td>
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<p>Creates ticks with a spacing given by the logarithm base and an increasing integer power in the provided <em>range</em>. The step in which the power increases tick by tick is chosen in order to keep the total number of ticks as close as possible to the tick count (<a class="el" href="classQCPAxisTicker.html#a47752abba8293e6dc18491501ae34008">setTickCount</a>). The parameter <em>tickStep</em> is ignored for <a class="el" href="classQCPAxisTickerLog.html" title="Specialized axis ticker suited for logarithmic axes. ">QCPAxisTickerLog</a></p>
<p>For general information about this virtual method, see the base class implementation. </p>
<p>Reimplemented from <a class="el" href="classQCPAxisTicker.html#af4645a824c7bd2ca8fc7e86ebf9055bd">QCPAxisTicker</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>src/axis/axistickerlog.h</li>
<li>src/axis/axistickerlog.cpp</li>
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