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Sigmoid transfer function

post #1 of 5
Thread Starter 
Does anyone know of a sigmoid transfer function that approximates 1/(1+e^-x) that doesn't use exponents. In the language I am using I am limited to addition subtraction multiplication and division. I saw the function a few days ago but I can't remember it and I don't remember what it was.Any information would be appreciated.
post #2 of 5
<img src="graemlins/bugeye.gif" border="0" alt="[Skeptical]" />

The Genius Bar is <a href="http://forums.appleinsider.com/cgi-bin/ultimatebb.cgi?ubb=forum&f=7" target="_blank">right this way</a>, sir.
post #3 of 5
Look up table?
post #4 of 5
I hate math.
post #5 of 5
Oh. I thought this was a carry over forum from the band name thread.

woops!
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