<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Qwt User's Guide: QwtScaleArithmetic Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"> <link href="doxygen.css" rel="stylesheet" type="text/css"> </head><body> <!-- Generated by Doxygen 1.5.8 --> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li class="current"><a href="annotated.html"><span>Classes</span></a></li> <li><a href="files.html"><span>Files</span></a></li> </ul> </div> <div class="tabs"> <ul> <li><a href="annotated.html"><span>Class List</span></a></li> <li><a href="classes.html"><span>Class Index</span></a></li> <li><a href="hierarchy.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Class Members</span></a></li> </ul> </div> </div> <div class="contents"> <h1>QwtScaleArithmetic Class Reference</h1><!-- doxytag: class="QwtScaleArithmetic" -->Arithmetic including a tolerance. <a href="#_details">More...</a> <p> <code>#include <<a class="el" href="qwt__scale__engine_8h-source.html">qwt_scale_engine.h</a>></code> <p> <p> <a href="class_qwt_scale_arithmetic-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0"> <tr><td></td></tr> <tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">compareEps</a> (double value1, double value2, double intervalSize)</td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#86da4fc0928457d03201d8b520d7d816">ceilEps</a> (double value, double intervalSize)</td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">floorEps</a> (double value, double intervalSize)</td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#e5f0415105b2a97cccb93f3da9ddaead">divideEps</a> (double interval, double steps)</td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#5768ab1c30f4fa8f02e3bb83f50fac02">ceil125</a> (double x)</td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#0cf6b5993a700cf0f00175486bd57b5b">floor125</a> (double x)</td></tr> </table> <hr><a name="_details"></a><h2>Detailed Description</h2> Arithmetic including a tolerance. <hr><h2>Member Function Documentation</h2> <a class="anchor" name="5768ab1c30f4fa8f02e3bb83f50fac02"></a><!-- doxytag: member="QwtScaleArithmetic::ceil125" ref="5768ab1c30f4fa8f02e3bb83f50fac02" args="(double x)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double QwtScaleArithmetic::ceil125 </td> <td>(</td> <td class="paramtype">double </td> <td class="paramname"> <em>x</em> </td> <td> ) </td> <td><code> [static]</code></td> </tr> </table> </div> <div class="memdoc"> <p> Find the smallest value out of {1,2,5}*10^n with an integer number n which is greater than or equal to x<p> <dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>x</em> </td><td>Input value </td></tr> </table> </dl> </div> </div><p> <a class="anchor" name="86da4fc0928457d03201d8b520d7d816"></a><!-- doxytag: member="QwtScaleArithmetic::ceilEps" ref="86da4fc0928457d03201d8b520d7d816" args="(double value, double intervalSize)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double QwtScaleArithmetic::ceilEps </td> <td>(</td> <td class="paramtype">double </td> <td class="paramname"> <em>value</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">double </td> <td class="paramname"> <em>intervalSize</em></td><td> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td><td><code> [static]</code></td> </tr> </table> </div> <div class="memdoc"> <p> Ceil a value, relative to an interval<p> <dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>value</em> </td><td>Value to ceil </td></tr> <tr><td valign="top"></td><td valign="top"><em>intervalSize</em> </td><td>Interval size</td></tr> </table> </dl> <dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">floorEps()</a> </dd></dl> </div> </div><p> <a class="anchor" name="6c6f982022550fba9ccee034f87461ce"></a><!-- doxytag: member="QwtScaleArithmetic::compareEps" ref="6c6f982022550fba9ccee034f87461ce" args="(double value1, double value2, double intervalSize)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int QwtScaleArithmetic::compareEps </td> <td>(</td> <td class="paramtype">double </td> <td class="paramname"> <em>value1</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">double </td> <td class="paramname"> <em>value2</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">double </td> <td class="paramname"> <em>intervalSize</em></td><td> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td><td><code> [static]</code></td> </tr> </table> </div> <div class="memdoc"> <p> Compare 2 values, relative to an interval. <p> Values are "equal", when : <img class="formulaInl" alt="$\cdot value2 - value1 <= abs(intervalSize * 10e^{-6})$" src="form_0.png"><p> <dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>value1</em> </td><td>First value to compare </td></tr> <tr><td valign="top"></td><td valign="top"><em>value2</em> </td><td>Second value to compare </td></tr> <tr><td valign="top"></td><td valign="top"><em>intervalSize</em> </td><td>interval size</td></tr> </table> </dl> <dl class="return" compact><dt><b>Returns:</b></dt><dd>0: if equal, -1: if value2 > value1, 1: if value1 > value2 </dd></dl> </div> </div><p> <a class="anchor" name="e5f0415105b2a97cccb93f3da9ddaead"></a><!-- doxytag: member="QwtScaleArithmetic::divideEps" ref="e5f0415105b2a97cccb93f3da9ddaead" args="(double interval, double steps)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double QwtScaleArithmetic::divideEps </td> <td>(</td> <td class="paramtype">double </td> <td class="paramname"> <em>intervalSize</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">double </td> <td class="paramname"> <em>numSteps</em></td><td> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td><td><code> [static]</code></td> </tr> </table> </div> <div class="memdoc"> <p> Divide an interval into steps. <p> <img class="formulaInl" alt="$stepSize = (intervalSize - intervalSize * 10e^{-6}) / numSteps$" src="form_1.png"><p> <dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>intervalSize</em> </td><td>Interval size </td></tr> <tr><td valign="top"></td><td valign="top"><em>numSteps</em> </td><td>Number of steps </td></tr> </table> </dl> <dl class="return" compact><dt><b>Returns:</b></dt><dd>Step size </dd></dl> </div> </div><p> <a class="anchor" name="0cf6b5993a700cf0f00175486bd57b5b"></a><!-- doxytag: member="QwtScaleArithmetic::floor125" ref="0cf6b5993a700cf0f00175486bd57b5b" args="(double x)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double QwtScaleArithmetic::floor125 </td> <td>(</td> <td class="paramtype">double </td> <td class="paramname"> <em>x</em> </td> <td> ) </td> <td><code> [static]</code></td> </tr> </table> </div> <div class="memdoc"> <p> Find the largest value out of {1,2,5}*10^n with an integer number n which is smaller than or equal to x. <p> <dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>x</em> </td><td>Input value </td></tr> </table> </dl> </div> </div><p> <a class="anchor" name="924d97f2e5db236f43f4d65e430e09c1"></a><!-- doxytag: member="QwtScaleArithmetic::floorEps" ref="924d97f2e5db236f43f4d65e430e09c1" args="(double value, double intervalSize)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double QwtScaleArithmetic::floorEps </td> <td>(</td> <td class="paramtype">double </td> <td class="paramname"> <em>value</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">double </td> <td class="paramname"> <em>intervalSize</em></td><td> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td><td><code> [static]</code></td> </tr> </table> </div> <div class="memdoc"> <p> Floor a value, relative to an interval<p> <dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>value</em> </td><td>Value to floor </td></tr> <tr><td valign="top"></td><td valign="top"><em>intervalSize</em> </td><td>Interval size</td></tr> </table> </dl> <dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">floorEps()</a> </dd></dl> </div> </div><p> </div> <hr size="1"><address style="text-align: right;"><small>Generated on Sun Mar 22 16:41:27 2009 for Qwt User's Guide by <a href="http://www.doxygen.org/index.html"> <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.8 </small></address> </body> </html>