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QCustomPlot: how to convert data index to axis value and vice versa



  • Hi!
    Trying to explore this title for a few hours...
    Please, explain how to get a visible x-axis value for the data index?
    For example:
    QVector<double>x,y;
    x - has a values from 0 to 1000.
    xAxis has a Range values from -17000 to 17000.

    Don't understand, how to get xAxis value by a value x? What a visible value of x = 223?



  • ui->widget->graph(0)->dataMainKey(index);
    

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