using a cfit result in mathematical operations

I have some noisy data that I could not use for mathematical
computations because the noise was accentuated as derivatives were
taken. What I did to resolve the problem was to curve fit a smoothing
spline to the noisy data, allowing me to take the 1st and 2nd
derivatives of the curve rather than the "real" data. I can now use
these derivatives in my calculations. However, I would like to also
perform simple multiplication on my curve fit vector. I thought I
would be able to do this with syntax similar to what is used to
access data within a structural array (struct.thing). But, that
doesn't work for cfit.

So, I guess my question is "how do I obtain the vector containing my
curve fit from the resulting cfit?"

Thanks
Chris
.

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