[SciPy-user] pyqwt or matplotlib

Hi everybody, I'm starting to write a program with PyQt to visualize some traces from a system of ODEs. I would like to plot one graphic for each variable inside this PyQt application...and I'm wondering which one is the best for it: matplotlib or pyqwt? I will read some files using PyTables and then I'll plot everything and some of these files are very big, so I need something fast and good. I've been using matplotlib for some small programs and it's very nice, powerful and beautiful. I've already embedded some matplotlib plots inside a PyQt application. But I have the impression that pyqwt is faster than matplotlib. Is it true? Is there another library for plotting that would do the job? Thanks! Bernardo M. Rocha