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 (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.

Author

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