Horizontal asymptote of exponential decay

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Lynn Knoblauch 2013-1-25

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采纳的回答： Walter Roberson

Hello, does anyone know how to find the horizontal asymptote of an exponential decay function?

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Walter Roberson 2013-1-25

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Evaluate the function at infinity.

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Lynn Knoblauch 2013-1-30

I would never of thought of this and this does make more sense. Thank you for your response. MUCH APPRECIATED!

Walter Roberson 2013-1-30

The diff() should logically be fitted with a difference of x coordinates, but since your x is in the exponent, A*exp(B*x)+C, subtracting for two different x... (A*exp(B*x1)+C) - (A*exp(B*x2)+C) = A*(exp(B*x1)-exp(B*x2)) and then you do not get nice clean log(exp(B*x)) -> B*x like I was thinking when I proposed the above.

I think a nonlinear least-squares is going to be needed.

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