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Series expansion of a sigmoid

  1. Nov 22, 2011 #1
    I am just curious to know if it is possible to derive a series expansion for the following sigmoid equation:

    base + max/(1+exp(H-x/rate))

    where the coefficients are base, max, H, and rate.

    Would appreciate any insight.
  2. jcsd
  3. Nov 22, 2011 #2
    Seem like I can infer from the ratio of responses to views that this is not a very feasible concept...? In any case, I would appreciate any type of feedback. I would just like to get an idea of how attainable the derivation is, especially from someone who is knowledgable on applying taylor series expansion to functions.
  4. Nov 23, 2011 #3
    What type of series are you interested in? Taylor?
    You can use wolframalpha's symbolic calculator: http://www.wolframalpha.com/input/?i=series+b+++m/(1+exp(H-x/r))
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