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
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