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Stretched exponential curve fits:

  • Equations of the form: y = 1 – exp[ -(t / tau)^b]
  • This can cause a problem because KaleidaGraph could be trying to take a root of a negative value.
  • To solve the problem, rewrite the equation as: y = 1 – 1 / [exp((t / tau)^b)]


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Posted in: General Curve Fit