real time plotting

[Uwe]

What if I was just changing the axis scale upon some timer event ...

I don't know enough about your application, but in general it should be enough to assign your new points to the curve and do a replot. The autoscaler will do the rest.

If you store your data in your own type of container I recommend to write your own QwtData bridge. This way you don't need to copy anything and a single replot every couple of seconds will do what you want.

Uwe

[gyre]

If you store your data in your own type of container I recommend to write your own QwtData bridge. This way you don't need to copy anything and a single replot every couple of seconds will do what you want.

Thanks...Ive searched the docs and what you are saying seems reasonable...