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July 18th, 2012, 09:12 AM   #1
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Sigmoid function


I wonder if someone could help me formulate a sigmoid function?

The range of the input can be both positive and negative, let's say 1.0 to -1.0, whereas the output is just positive, 0 to 1.0.

Any help appreciated?

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July 18th, 2012, 02:37 PM   #2
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(1 - sin(?x/2))/2, where x ? [-1, 1]
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