Help understanding unipolar transfer function

Posted by locky28 on Stack Overflow See other posts from Stack Overflow or by locky28
Published on 2010-05-10T21:18:03Z Indexed on 2010/05/10 21:24 UTC
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artificial-neural-network

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neural-network

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function

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mathematics

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algebra

There is a question I am stuck on using the following formula for the unipolar transfer function:

f(net)=     1
    __________
           -net
     1 + e

The example has the following:

out =      1
 ____________ = 0.977
        -3.75
  1 + e

How do we arrive at 0.977?

What is e?

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