Function calculating the absolute difference of two dose response models: $$dff(d,\beta_1,\beta_2)=|m_1(d,\beta_1)-m_2(d,\beta_2)|$$
dff(d, beta1, beta2, m1, m2)
real-valued argument to the function (dose variable)
model parameters (real vectors)
model types. Built-in models are "linlog", "linear", "quadratic", "emax", "exponential", "sigEmax", "betaMod" and "logistic"
Response value for the absolute difference of two models.