Re: [Phys-L] Finally ... normalized (by population) data, and Andorra

[brian whatcott <betwys1@sbcglobal.net>]

More on the logistic function.

On 4/13/2020 10:54 AM, David Bowman wrote:
/snip/
> One problem with a logistic function, being the simplest function that 
> has exponential growth at the left side end and exponential decay to 
> an upper bound at the right side end, is that both the left side 
> exponential growth and right side exponential decay necessarily have 
> the *same* exponential rate.
> /snip/
> David Bowman
Thanks to your critical treatment of the logistic fit approach, I was 
triggered to DO something, since the upper bound was stepping up every 
day AFTER the day that the daily case rate peaked. With some days of 
data in hand post peak,  it was the work of a few minutes to run the 
nonlinear fit to the case data including only the data for days at and 
after the peak day. And yes - the upper bound jumped to a new 
appreciably higher level, which does not seem to need daily gardening. 
Thanks

Brian w