Hi,
how do you want to plot a series of floats? for each point, you need an x- and a y-value.
assuming, you have a QVector with x-values and a QVector with y-values, you can use "SetSamples(...)" (or thelike) to add your points to a curve. have a look at the documentation of QwtPlotCurve and you'll find the appropriate method.
hth,
Felix
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