% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/blockfit_solve.R
\name{.bf_get_mu_eta}
\alias{.bf_get_mu_eta}
\title{Numerical Derivative of the Inverse Link Function}
\usage{
.bf_get_mu_eta(eta, fam)
}
\arguments{
\item{eta}{Numeric vector of linear predictor values.}

\item{fam}{GLM family object.}
}
\value{
Numeric vector of the same length as \code{eta}.
}
\description{
Returns \eqn{\partial\mu / \partial\eta} for the supplied family
object, using the family's own \code{mu.eta} method when available
and falling back to analytic forms for common links or central
differences otherwise.
}
\keyword{internal}
