How can I fit a sigmoid line to data points using Excel or Maple?

[Supfresh]

Hi

I used plot digitizer software to pull data points off a picture of a graph and i need to fit a line to the points (and get an equation for the line). I know the data points fit to an s-curve from the picture. I'm thinking excel doesn't do this, or maybe I missed it?

I have access to maple, can this do s-curves?

thanks in advance

 

[Bill Simpson]

Google

Excel fit sigmoid

to find 585000 hits and it looks like you should find what you need to do there