#include "qwt_global.h"
#include <qmath.h>

Include dependency graph for qwt_math.h:

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Functions
double	qwtCubicPolynom (double x, double a, double b, double c, double d)
double	qwtDegrees (double degrees)
	Translate radians into degrees.
double	qwtFastAtan (double x)
	Approximation of arc tangent ( error below 0,005 radians )
double	qwtFastAtan2 (double y, double x)
	Approximation of arc tangent ( error below 0,005 radians )
int	qwtFuzzyCompare (double value1, double value2, double intervalSize)
	Compare 2 values, relative to an interval.
QWT_EXPORT double	qwtGetMax (const double *array, int size)
	Find the largest value in an array.
QWT_EXPORT double	qwtGetMin (const double *array, int size)
	Find the smallest value in an array.
QWT_EXPORT double	qwtNormalizeDegrees (double degrees)
	Normalize an angle to be int the range [0.0, 360.0[.
QWT_EXPORT double	qwtNormalizeRadians (double radians)
	Normalize an angle to be int the range [0.0, 2 * PI[.
double	qwtRadians (double degrees)
	Translate degrees into radians.
int	qwtSign (double x)
	Return the sign.
double	qwtSqr (double x)
	Return the square of a number.

Function Documentation

double qwtCubicPolynom	(	double	x,
		double	a,
		double	b,
		double	c,
		double	d
	)		`[inline]`

Definition at line 137 of file qwt_math.h.

double qwtDegrees ( double degrees ) [inline]

Translate radians into degrees.

Definition at line 150 of file qwt_math.h.

double qwtFastAtan ( double x ) [inline]

Approximation of arc tangent ( error below 0,005 radians )

Definition at line 94 of file qwt_math.h.

double qwtFastAtan2	(	double	y,
		double	x
	)		`[inline]`

Approximation of arc tangent ( error below 0,005 radians )

Definition at line 106 of file qwt_math.h.

int qwtFuzzyCompare	(	double	value1,
		double	value2,
		double	intervalSize
	)		`[inline]`

Compare 2 values, relative to an interval.

Values are "equal", when : $\cdot value2 - value1 <= abs(intervalSize * 10e^{-6})$

Parameters:

value1	First value to compare
value2	Second value to compare
intervalSize	interval size

Returns:: 0: if equal, -1: if value2 > value1, 1: if value1 > value2

Definition at line 63 of file qwt_math.h.

QWT_EXPORT double qwtGetMax	(	const double *	array,
		int	size
	)

Find the largest value in an array.

Parameters:

array	Pointer to an array
size	Array size

Definition at line 35 of file qwt_math.cpp.

QWT_EXPORT double qwtGetMin	(	const double *	array,
		int	size
	)

Find the smallest value in an array.

Parameters:

array	Pointer to an array
size	Array size

Definition at line 17 of file qwt_math.cpp.

QWT_EXPORT double qwtNormalizeDegrees ( double degrees )

Normalize an angle to be int the range [0.0, 360.0[.

Parameters:

radians Angle in degrees

Returns:: Normalized angle in degrees

Definition at line 67 of file qwt_math.cpp.

QWT_EXPORT double qwtNormalizeRadians ( double radians )

Normalize an angle to be int the range [0.0, 2 * PI[.

Parameters:

radians Angle in radians

Returns:: Normalized angle in radians

Definition at line 52 of file qwt_math.cpp.

double qwtRadians ( double degrees ) [inline]

Translate degrees into radians.

Definition at line 144 of file qwt_math.h.

int qwtSign ( double x ) [inline]

Return the sign.

Definition at line 77 of file qwt_math.h.

double qwtSqr ( double x ) [inline]

Return the square of a number.

Definition at line 88 of file qwt_math.h.

Functions

Function Documentation