A disciplined oscillator can be modeled by an equation like:

OSC_FREQ = DRIFT_RATE*TIME + TEMPCO*TEMP + OSC_GAIN*DAC_VOLTAGE

For a set of data I know TIME,  TEMP,  FREQ,  DAC_VOLTAGE and OSC_GAIN (a 
constant in Hz/V).

What the good Lady Heather wants to calculate is the DRIFT_RATE (Hz per sec) 
and TEMPCO (Hz per degree C).

Does anybody have any code (preferably nice and simple C code)  to calculate 
those two parameters from a data set containing the other 5 values.             
                             
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