4.25 ( ) Suppose we wish to approximate the logistic sigmoid (a) defined by (4.59) by...
Question:
4.25 ( ) Suppose we wish to approximate the logistic sigmoid σ
(a) defined by (4.59)
by a scaled probit function Φ(λa), where Φ
(a) is defined by (4.114). Show that if
λ is chosen so that the derivatives of the two functions are equal at a = 0, then
λ2 = π/8.
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Related Book For
Pattern Recognition And Machine Learning
ISBN: 9780387310732
1st Edition
Authors: Christopher M Bishop
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