time | value
0001 | 0003
0002 | 0002
0003 | 0004
0004 | 0007
0005 | 0001
You have 4 Byte time, 4 Byte value and so on.
Read them and append each to a QVector<double> and use
QwtPlotCurve::setSamples (const QVector< double > &xData, const QVector< double > &yData)
to plot it.
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