The formula for Tau is where M is the slope of a linear fit of the natural log (ln) of pressure points from min dP/dt to a terminus. The terminus shall be set to 66% of the total pressure drop in the cycle. We may choose to include the point or not based upon a confidence value from the linear fit. Multiply the result by 1000 to change the units from seconds to milliseconds.
Dataquest ART Tau Calculation
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