Guess what you really want to do is to set up a special transformation, see:


  • QwtScaleEngine::setTransformation()
  • QwtPlot::setAxisScaleEngine()


But if your question is really only about how to modify the tick label on the axis:


  • QwtAbstractScaleDraw::label()
  • QwtPlot::setAxisScaleDraw()


HTH,
Uwe