The general asymmetric five-parameter logistic model for describing dose-response relationships.
meL.2(x, b, e) meL.3(x, b, d, e) meL.4(x, b, c, d, e) meL.5(x, b, c, d, e, f)
| x | numeric dose vector. |
|---|---|
| b | steepness |
| e | ED50 |
| d | upper limit |
| c | lower limit |
| f | asymmetry |
The default arguments yields the five-parameter logistic mean function given by the expression $$ f(x) = c + \frac{d-c}{(1+\exp(b(x - e)))^f}$$ The model is sometimes referred to as the Boltzmann model.