scott <sco### [at] scottcom> wrote:
> > http://www.wolframalpha.com/input/?i=%28e^-6.3%29%2810^x%29%2Fx!+from+0+to+15
> >
> > Looking for something f(0)=0,  with a single maximum at medium values, and very
> > slowly decays back to zero. The actual diffusion equation (as I remember from
> > long ago) would do that.  Like the smell on the opposite side of a room after
> > you open bottle. (Want it for my flocking formulas).
>
> If you're after something simple, how about x/(x^2+a^2) which will give
> you a peak at "a" and tail off slowly.

great, thanks.

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