[portland] Any Mathematical Coders Here?

[Rich Shepard]

On Wed, 7 May 2008, mark gross wrote:

> I know enough to get into trouble.  But I don't know what a sigmoind cure
> is other than http://mathworld.wolfram.com/SigmoidFunction.html which
> isn't very helpful.

   No, the sigmoidal function doesn't work.

> If you are substituting in arctan's for this curve then I have to think
> you are looking for something that "looks" like something as opposed to
> something that means anything.

   Arctan doesn't work, either. I need a function which will provide a y
value for any given x value in the domain.

Rich

-- 
Richard B. Shepard, Ph.D.               |  Integrity            Credibility
Applied Ecosystem Services, Inc.        |            Innovation
<http://www.appl-ecosys.com>     Voice: 503-667-4517      Fax: 503-667-8863