QwtSplineCurveFitter Class Reference

A curve fitter using cubic splines. More...

#include <qwt_curve_fitter.h>

Inheritance diagram for QwtSplineCurveFitter:

Public Types
enum	FitMode { Auto, Spline, ParametricSpline }

Public Member Functions
	QwtSplineCurveFitter ()
	Constructor.
virtual	~QwtSplineCurveFitter ()
	Destructor.
void	setFitMode (FitMode)
FitMode	fitMode () const
void	setSpline (const QwtSpline &)
const QwtSpline &	spline () const
QwtSpline &	spline ()
void	setSplineSize (int size)
int	splineSize () const
virtual QPolygonF	fitCurve (const QPolygonF &) const
Public Member Functions inherited from QwtCurveFitter
virtual	~QwtCurveFitter ()
	Destructor.

Additional Inherited Members
Protected Member Functions inherited from QwtCurveFitter
	QwtCurveFitter ()
	Constructor.

Detailed Description

A curve fitter using cubic splines.

Member Enumeration Documentation

enum QwtSplineCurveFitter::FitMode

Spline type The default setting is Auto

See Also

setFitMode(), FitMode()

Enumerator
Auto	Use the default spline algorithm for polygons with increasing x values ( p[i-1] < p[i] ), otherwise use a parametric spline algorithm.
Spline	Use a default spline algorithm.
ParametricSpline	Use a parametric spline algorithm.

Member Function Documentation

QPolygonF QwtSplineCurveFitter::fitCurve ( const QPolygonF &  points ) const

virtual

Find a curve which has the best fit to a series of data points

Parameters

points

Series of data points

Returns

Curve points

Implements QwtCurveFitter.

QwtSplineCurveFitter::FitMode QwtSplineCurveFitter::fitMode

(

)

const

Returns

Mode representing a spline algorithm

See Also

setFitMode()

void QwtSplineCurveFitter::setFitMode

(

FitMode

mode

)

Select the algorithm used for building the spline

Parameters

mode	Mode representing a spline algorithm

See Also

fitMode()

void QwtSplineCurveFitter::setSpline

(

const QwtSpline &

spline

)

Assign a spline

Parameters

spline

Spline

See Also

spline()

void QwtSplineCurveFitter::setSplineSize

(

int

splineSize

)

Assign a spline size ( has to be at least 10 points )

Parameters

splineSize

Spline size

See Also

splineSize()

const QwtSpline & QwtSplineCurveFitter::spline

(

)

const

Returns

Spline

See Also

setSpline()

QwtSpline & QwtSplineCurveFitter::spline

(

)

Returns

Spline

See Also

setSpline()

int QwtSplineCurveFitter::splineSize

(

)

const

Returns

Spline size

See Also

setSplineSize()