How to remove margins from plot?

[P@u1]

Hi,

I want to display a plot without margins at the left and right sides.
I tried using

plot->axisScaleEngine(QwtPlot::xBottom)->setMargins(0., 0.);

plot->axisScaleEngine(QwtPlot::xBottom)->setMargins(0., 0.);

To copy to clipboard, switch view to plain text mode 

but it doesen't change anything.

On both sides there is still free space which is not used by the plot.
How can I solve this?

[Uwe]

Check the examples.

Uwe

[P@u1]

Could you please give me a hint, in which example I have to look?

And if you're talking about settings the scale manually - this is what I already did and it works fine, but I would prefer not to have to do it.

Thanks again for your great help in the last days :-)