how to create a 4 parameter logistic equation curve ( 4 P L Curve ) with VB , VBA or Excel? instead of using MatLab or other Math add-in ?
thanks in advance
Generalized logistic function with 4 or 5 parameters.
With formulas, no code.
Check out the IVDfit excel add-in. This will do the 4PL curve fit and interpolation for you. It can be downloaded at
For a 4PL inside Excel you could try this Add-in - it is optimised for microplate assays but works well and produces a chart inside Excel:
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