Compute the Emax or its inverse.
Usage
emax_fun(x, e0, emax, ex50, hill = 1)
inverse_emax(effect, e0, emax, ex50, hill = 1)
Arguments
- x
The input paramter (often a concentration)
- e0
Baseline effect
- emax
Maximum effect (at the limit as x approaches Inf)
- ex50
Amount of x yielding 50% of the maximum effect
- hill
The hill slope (also known as the sigmoidicity)
- effect
The effect
Value
effect for emax_fun or x for inverse_emax
Details
The equation for the Emax function is
$$effect = e0 + emax * x^{hill}/(ex50^{hill} + x^{hill})$$