Qwt User's Guide
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Logarithmic transformation. More...
#include <qwt_transform.h>
Public Member Functions | |
QwtLogTransform () | |
Constructor. | |
virtual | ~QwtLogTransform () |
Destructor. | |
virtual double | transform (double value) const |
virtual double | invTransform (double value) const |
virtual double | bounded (double value) const |
virtual QwtTransform * | copy () const |
Public Attributes | |
QT_STATIC_CONST double | LogMin = 1.0e-150 |
Smallest allowed value for logarithmic scales: 1.0e-150. | |
QT_STATIC_CONST double | LogMax = 1.0e150 |
Largest allowed value for logarithmic scales: 1.0e150. |
Logarithmic transformation.
QwtLogTransform modifies the values using log() and exp().
double QwtLogTransform::bounded | ( | double | value | ) | const [virtual] |
value | Value to be bounded |
Reimplemented from QwtTransform.
QwtTransform * QwtLogTransform::copy | ( | ) | const [virtual] |
Implements QwtTransform.
double QwtLogTransform::invTransform | ( | double | value | ) | const [virtual] |
double QwtLogTransform::transform | ( | double | value | ) | const [virtual] |