QwtPowerTransform (3) Linux Manual Page
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 (doubleexponent)
Constructor Parameters:
- exponent Exponent
Member Function Documentation
QwtTransform * QwtPowerTransform::copy () const [virtual]
Returns:- Clone of the transformation
Implements QwtTransform.
double QwtPowerTransform::invTransform (doublevalue) const [virtual]
Parameters:- value Value to be transformed
Returns:
- Inverse exponentiation preserving the sign
Implements QwtTransform.
double QwtPowerTransform::transform (doublevalue) const [virtual]
Parameters:- value Value to be transformed
Returns:
- Exponentiation preserving the sign
Implements QwtTransform.