Function that calculates the final value of an expotential function

[Richo]

We know that various probes have a long time constant. It would be nice to have a function where you only have to make 3 measurements to know the final result. This applies to all situations with an expotential function.
/Richo

[cicciocb]

Have you tried to ask the question to our AI best friend?

[BeanieBots]

Have you tried to ask the question to our AI best friend?

Interestingly, I've been trying that out quite a bit with varied results.
For questions that require mathematical analysis and/or complex equations, I strongly suggest Copilot.
I've had it do very complex fluid dynamics equations with exceptional results that include the working out for varification.
It also writes the code for you if you ask
Unfortunately, it refuses to get Annex BASIC code of the correct syntax (yet) but if you ask for VB code it is not hard to translate.
Well worth a try.

[botman]

@Richo: If you have a true exponential decay curve with three readings spaced at equal time increments, and your first reading is R1, and your second reading is R2, and your third reading is R3, then the following ratio should evaluate to the final value. The numerator is R1*R3-R2*R2, and the denominator is R1-2*R2+R3. In your example, the numerator evaluates to be -7349.9 , and the denominator evaluates to -7.35 , so the final value evaluates to 999.9859 !