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QwtPowerTransform(3) Qwt User's Guide QwtPowerTransform(3)

NAME

QwtPowerTransform - A transformation using pow()

SYNOPSIS

#include <qwt_transform.h>

Inherits QwtTransform.

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

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.

Constructor & Destructor Documentation

QwtPowerTransform::QwtPowerTransform (double exponent)

Constructor

Parameters:

exponent Exponent

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.

Author

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Wed Jan 2 2019 Version 6.1.4