Matrix (version 0.98-7)

simulate: Simulate responses from a fitted model

Description

This generic function generates a sample of responses from a fitted model object using the parameter estimates from the fit. Typically these simulated responses are used in a parametric bootstrap sample of a test statistic.

Usage

simulate(object, nsim, seed, ...)

Arguments

object

an object representing a fitted model.

nsim

number of response vectors to simulate. Defaults to 1.

seed

an integer that will be used in a call to set.seed before simulating the response vectors. The value is saved as an attribute named "seed" in the returned value. Defaults to a random integer between 0 a

...

additional optional arguments.

Value

• A data frame with nsim columns and nobs, the number of observations in the fitted model object, rows.

Examples

(fm2 <- lmer(Reaction ~ Days + (1|Subject) + (0 + Days|Subject), sleepstudy))
sim2 <- simulate(fm2, nsim = 4)
head(sim2)
tail(sim2)