PT non-zeroed torque adjustment

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Halfway through my ride I zeroed my torque. It was not zero up to then.
Is there an algorithm I can use to adjust the .csv records before I zeroed?
(Saris says they can't/won't answer this question.)

Halfway through my ride I zeroed my torque. It was not zero up to then.
Is there an algorithm I can use to adjust the .csv records before I zeroed?
(Saris says they can't/won't answer this question.)
http://midweekclub.ca/powerFAQ.htm#Q46