I need an S-curve equation that looks at two numbers

RockandGrohl

Well-known Member
Joined
Aug 1, 2018
Messages
788
Office Version
  1. 2010
Platform
  1. Windows
I've been reading more about the problem I describe here:

I need to examine the relationship between two parameters and allocate points to them.


I think what I need is actually a formula that result in an S-curve, like this:


To be clear, I'm not trying to make a graph, but if you imagine the Y-axis of the graph runs from -50 to +50, then the result of the formula would be within that range.

There are four inputs:

1) The Ratio, or "r"
2) The number of advertisements, or "a"
3) The average ratio, 0.2
4) The average advertisements, 20

What I'd like to do is input the r and a and have it compare against the average inputs.

If the average ratio is 0.2, and the advertisements is 20, then parameters that exceed this should be weighted higher up the S curve in points to an upper limit of +50 points. And the inverse is true.

Does anyone know of a formula where I can just jiggle the parameters around? Thanks.
 

Excel Facts

What is =ROMAN(40) in Excel?
The Roman numeral for 40 is XL. Bill "MrExcel" Jelen's 40th book was called MrExcel XL.

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