2D Line Plot with Colored Vertical Lines combined

[bob2oneil]

I am a newbie on Qwt, can you be more specific? I would need a sequence of vertical lines, which would have full vertical height, but these data points could not be content that drives autoscaling vertically.
How could a singular XY data point represent a range of Y for a single X.?

[bob2oneil]

What about a QwtPlotMarker(). I would need a value that would be created dynamically, and the content of the marker spanning the entire range of Y would not be involved in autoscaling Y calculations.

[Uwe]

I didn't get 100% what you need, but have a look at QwtPlotIntervalCurve. Check the friedberg example and enable the bars mode.

Uwe