Real-time plotting

[Søren Hauberg]

Hi,
  This is not entirely related to Octave, but I figured I'd ask 
anyway... (so, sorry about the potential noise)
  I'm in the process of moving a prototype developed in Octave to a 
real-time implementation in C++. In general this is quite easy, but I 
find that I need a plotting library that will run in real-time. I can't 
really use gnuplot here, since it's simply too slow. Can anybody here 
recommend a plotting library that is fast enough for real-time purposes. 
I don't need anything fancy -- it's just for simple plots.

Thanks, and sorry about the noise,
Søren