QwtPowerTransform Class Reference

A transformation using pow() More...

#include <qwt_transform.h>

Inheritance diagram for QwtPowerTransform:

Public Member Functions
	QwtPowerTransform (double exponent)
virtual	~QwtPowerTransform ()
	Destructor.
virtual double	transform (double value) const
virtual double	invTransform (double value) const
virtual QwtTransform *	copy () const

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Detailed Description

A transformation using pow()

QwtPowerTransform preserves the sign of a value. F.e. a transformation with a factor of 2 transforms a value of -3 to -9 and v.v. Thus QwtPowerTransform can be used for scales including negative values.

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Constructor & Destructor Documentation

QwtPowerTransform::QwtPowerTransform

(

double

exponent

)

Constructor

Parameters:

exponent

Exponent

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Member Function Documentation

QwtTransform * QwtPowerTransform::copy

(

)

const [virtual]

Returns:

Clone of the transformation

Implements QwtTransform.

double QwtPowerTransform::invTransform

(

double

value

)

const [virtual]

Parameters:

value

Value to be transformed

Returns:

Inverse exponentiation preserving the sign

Implements QwtTransform.

double QwtPowerTransform::transform

(

double

value

)

const [virtual]

Parameters:

value

Value to be transformed

Returns:

Exponentiation preserving the sign

Implements QwtTransform.

List of all members.