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#include <QtGui>
#include <qwt_plot.h>
#include <qwt_plot_curve.h>
int main (int argc, char** argv)
QApplication app( argc, argv );
QwtPlot plot;
QwtPlotCurve curve;
curve.setSamples( QVector<QPointF>
{ QPointF(1, 1), QPointF(2, 3), QPointF(3, 2), QPointF(4, -1) } );
curve.attach( &plot );;
qDebug() << plot.axisInterval( QwtPlot::xBottom );
return app.exec();
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