Changeset 9383 in ntrip for trunk/BNC/qwt/qwt_transform.h
- Timestamp:
- Mar 19, 2021, 9:15:03 AM (3 years ago)
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- 1 edited
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trunk/BNC/qwt/qwt_transform.h
r8127 r9383 73 73 74 74 QwtNullTransform returns the values unmodified. 75 75 76 76 */ 77 77 class QWT_EXPORT QwtNullTransform: public QwtTransform … … 92 92 93 93 \note In the calculations of QwtScaleMap the base of the log function 94 has no effect on the mapping. So QwtLogTransform can be used 94 has no effect on the mapping. So QwtLogTransform can be used 95 95 for log2(), log10() or any other logarithmic scale. 96 96 */ 97 97 class QWT_EXPORT QwtLogTransform: public QwtTransform 98 { 98 { 99 99 public: 100 100 QwtLogTransform(); 101 101 virtual ~QwtLogTransform(); 102 102 103 103 virtual double transform( double value ) const; 104 104 virtual double invTransform( double value ) const; … … 120 120 \brief A transformation using pow() 121 121 122 QwtPowerTransform preserves the sign of a value. 122 QwtPowerTransform preserves the sign of a value. 123 123 F.e. a transformation with a factor of 2 124 124 transforms a value of -3 to -9 and v.v. Thus QwtPowerTransform
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