Value of a covariate that maximizes the response variable in a quadratic model.

Consider a linear predictor having linear and square terms associated with a variable \(x\). Assume this variable was centered before being included in the linear predictor. This function returns the value of \(x\) (on its original scale) such that the linear predictor is maximized (or minimized).

Usage

max_quad_x(beta1, beta2, offset = 0)

Arguments

beta1

A numeric regression coefficient associated with the linear term.

beta2

A numeric regression coefficient associated with the quadratic term.

offset

a numeric representing the "center" of \(x\).

Value

A numeric value representing the uncentered \(x\) that maximizes (or minimizes) the linear predictor.

Author

Lucas Godoy