Isight - How to build RBF model by using data coefficient obtained from Isight?

I use approximation component in Isight to create RBF model. Now I want to re-build RBF model for other purpose(maybe on Python or MATLAB). Hence, I need to refer to coefficient data extracted from approximation component to finish this task. But I can't find detailed information about how to build RBF model from these coefficients in Isight  documentation. Can anybody give me some advice or reference? Thanks a lot!!