Qwt User's Guide
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A transformation using pow() More...
#include <qwt_transform.h>
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 |
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.
QwtPowerTransform::QwtPowerTransform | ( | double | exponent | ) |
Constructor
exponent | Exponent |
QwtTransform * QwtPowerTransform::copy | ( | ) | const [virtual] |
Implements QwtTransform.
double QwtPowerTransform::invTransform | ( | double | value | ) | const [virtual] |
value | Value to be transformed |
Implements QwtTransform.
double QwtPowerTransform::transform | ( | double | value | ) | const [virtual] |
value | Value to be transformed |
Implements QwtTransform.