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<hr><h1>qwt_math.h File Reference</h1>A set of mathematical routines.
<a href="#_details">More...</a>
<p>
<p>
Include dependency graph for qwt_math.h:<p><center><img src="qwt_math_h_incl.gif" border="0" usemap="#qwt_math.h_map" alt="Include dependency graph"></center>
<map name="qwt_math.h_map">
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<table border=0 cellpadding=0 cellspacing=0>
<tr><td colspan=2><br><h2>Defines</h2></td></tr>
<tr><td nowrap align=right valign=top><a name="a1" doxytag="qwt_math.h::LOG10_2"></a>
#define </td><td valign=bottom><b>LOG10_2</b> 0.30102999566398119802</td></tr>
<tr><td nowrap align=right valign=top><a name="a2" doxytag="qwt_math.h::LOG10_3"></a>
#define </td><td valign=bottom><b>LOG10_3</b> 0.47712125471966243540</td></tr>
<tr><td nowrap align=right valign=top><a name="a3" doxytag="qwt_math.h::LOG10_5"></a>
#define </td><td valign=bottom><b>LOG10_5</b> 0.69897000433601885749</td></tr>
<tr><td nowrap align=right valign=top><a name="a4" doxytag="qwt_math.h::M_2PI"></a>
#define </td><td valign=bottom><b>M_2PI</b> 6.28318530717958623200</td></tr>
<tr><td nowrap align=right valign=top><a name="a5" doxytag="qwt_math.h::LOG_MIN"></a>
#define </td><td valign=bottom><b>LOG_MIN</b> 1.0e-100</td></tr>
<tr><td nowrap align=right valign=top><a name="a6" doxytag="qwt_math.h::LOG_MAX"></a>
#define </td><td valign=bottom><b>LOG_MAX</b> 1.0e100</td></tr>
<tr><td colspan=2><br><h2>Functions</h2></td></tr>
<tr><td nowrap align=right valign=top>template<classT> const T& </td><td valign=bottom><a class="el" href="qwt_math_h.html#a7">qwtMax</a> (const T& x, const T& y)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> const T& </td><td valign=bottom><a class="el" href="qwt_math_h.html#a8">qwtMin</a> ( const T& x, const T& y)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> T </td><td valign=bottom><a class="el" href="qwt_math_h.html#a9">qwtAbs</a> (const T& x)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> int </td><td valign=bottom><a class="el" href="qwt_math_h.html#a10">qwtSign</a> (const T& x)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> T </td><td valign=bottom><a class="el" href="qwt_math_h.html#a11">qwtSqr</a> (const T&x)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> void </td><td valign=bottom><a class="el" href="qwt_math_h.html#a12">qwtCopyArray</a> (T *dest, T *src, int n)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> void </td><td valign=bottom><a class="el" href="qwt_math_h.html#a13">qwtShiftArray</a> (T *arr, int size, int di)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> void </td><td valign=bottom><a class="el" href="qwt_math_h.html#a14">qwtSwap</a> ( T &x1, T& x2)</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="qwt_math_h.html#a15">qwtInt</a> (double x)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> void </td><td valign=bottom><a class="el" href="qwt_math_h.html#a16">qwtSort</a> (const T& x1, const T& x2, T& xmin, T& xmax)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> void </td><td valign=bottom><a class="el" href="qwt_math_h.html#a17">qwtSort</a> (T& x1, T& x2)</td></tr>
<tr><td nowrap align=right valign=top>template<classT> T </td><td valign=bottom><a class="el" href="qwt_math_h.html#a18">qwtLim</a> (const T& x, const T& x1, const T& x2)</td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A set of mathematical routines.
<p>
<p>
<hr><h2>Function Documentation</h2>
<a name="a9" doxytag="qwt_math.h::qwtAbs"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
T qwtAbs (
</b></td>
<td valign="bottom"><b>
const T & <em>x</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return the absolute value.
<p>
</td>
</tr>
</table>
<a name="a12" doxytag="qwt_math.h::qwtCopyArray"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
void qwtCopyArray (
</b></td>
<td valign="bottom"><b>
T * <em>dest</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
T * <em>src</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>n</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Copy an array into another.
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>dest</em>
</td><td>
Destination </td></tr>
<tr><td valign=top><em>src</em>
</td><td>
Source </td></tr>
<tr><td valign=top><em>n</em>
</td><td>
Number of elements </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a15" doxytag="qwt_math.h::qwtInt"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int qwtInt (
</b></td>
<td valign="bottom"><b>
double <em>x</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Round a number to the nearest integer.
<p>
</td>
</tr>
</table>
<a name="a18" doxytag="qwt_math.h::qwtLim"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
T qwtLim (
</b></td>
<td valign="bottom"><b>
const T & <em>x</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
const T & <em>x1</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
const T & <em>x2</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Limit a value to fit into a specified interval.
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>x</em>
</td><td>
Input value </td></tr>
<tr><td valign=top><em>x1</em>
</td><td>
First interval boundary </td></tr>
<tr><td valign=top><em>x2</em>
</td><td>
Second interval boundary </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a7" doxytag="qwt_math.h::qwtMax"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
const T & qwtMax (
</b></td>
<td valign="bottom"><b>
const T & <em>x</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
const T & <em>y</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return the largest of two values.
<p>
</td>
</tr>
</table>
<a name="a8" doxytag="qwt_math.h::qwtMin"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
const T & qwtMin (
</b></td>
<td valign="bottom"><b>
const T & <em>x</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
const T & <em>y</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return the smallest of two values.
<p>
</td>
</tr>
</table>
<a name="a13" doxytag="qwt_math.h::qwtShiftArray"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
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<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
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<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
void qwtShiftArray (
</b></td>
<td valign="bottom"><b>
T * <em>arr</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>size</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>di</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Shift an array by a specified number of positions.
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>arr</em>
</td><td>
Pointer to an array </td></tr>
<tr><td valign=top><em>size</em>
</td><td>
Number of elements </td></tr>
<tr><td valign=top><em>di</em>
</td><td>
Number of positions. A positive number shifts right, a negative number shifts left. </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a10" doxytag="qwt_math.h::qwtSign"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
int qwtSign (
</b></td>
<td valign="bottom"><b>
const T & <em>x</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return the sign.
<p>
</td>
</tr>
</table>
<a name="a17" doxytag="qwt_math.h::qwtSort"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
void qwtSort (
</b></td>
<td valign="bottom"><b>
T & <em>x1</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
T & <em>x2</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Sort two values in ascending order.
<p>
</td>
</tr>
</table>
<a name="a16" doxytag="qwt_math.h::qwtSort"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
void qwtSort (
</b></td>
<td valign="bottom"><b>
const T & <em>x1</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
const T & <em>x2</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
T & <em>xmin</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
T & <em>xmax</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Sort two values in ascending order.
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>x1</em>
</td><td>
First input value </td></tr>
<tr><td valign=top><em>x2</em>
</td><td>
Second input value </td></tr>
<tr><td valign=top><em>xmax</em>
</td><td>
Greater value </td></tr>
<tr><td valign=top><em>xmin</em>
</td><td>
Smaller value </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a11" doxytag="qwt_math.h::qwtSqr"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
T qwtSqr (
</b></td>
<td valign="bottom"><b>
const T & <em>x</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return the square of a number.
<p>
</td>
</tr>
</table>
<a name="a14" doxytag="qwt_math.h::qwtSwap"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td colspan="2"><b>
template<classT> </b></td>
</tr>
<tr>
<td nowrap valign="top"><b>
void qwtSwap (
</b></td>
<td valign="bottom"><b>
T & <em>x1</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
T & <em>x2</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Swap two values.
<p>
</td>
</tr>
</table>
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