fixef.rxUi: Extract fixed effects from an rxode2 model (rxUi)

In rxode2: Facilities for Simulating from ODE-Based Models

Extract fixed effects from an rxode2 model (rxUi)

Description

Extract fixed effects from an rxode2 model (rxUi)

Usage

fixef.rxUi(object, ...)

fixef.function(object, ...)

Arguments

object	rxode2 ui model or a function that evaluates to one
...	other parameters (currently ignored)

Value

named numeric vector of the fixed-effect (theta) estimates

Author(s)

Matthew L. Fidler

Examples

one.compartment <- function() {
  ini({
    tka <- 0.45
    tcl <- 1
    tv <- 3.45
    eta.ka ~ 0.6
  })
  model({
    ka <- exp(tka + eta.ka)
    cl <- exp(tcl)
    v <- exp(tv)
    d/dt(depot) <- -ka * depot
    d/dt(center) <- ka * depot - cl / v * center
    cp <- center / v
  })
}

ui <- one.compartment()
nlme::fixef(ui)

rxode2 documentation built on July 28, 2026, 5:08 p.m.