Fixed-effect coefficients (lme4-compatible)

The fixed-effect point estimates, equivalent to coef() on a tulpa_fit. Provided under the fixef name for code written against the lme4 / nlme interface: lme4::fixef(fit) and nlme::fixef(fit) dispatch here too when either package is installed, so a tulpa_fit can be dropped into an lme4-shaped workflow.

Usage

fixef(object, ...)

# S3 method for class 'tulpa_fit'
fixef(object, ...)

Arguments

object: A tulpa_fit object.
...: Ignored.

Value

Named numeric vector of fixed-effect estimates.

Details

Note the deliberate difference from lme4::coef.merMod, which returns per-group sums of the fixed and random effects. On a tulpa_fit, coef() returns the fixed effects alone and fixef() is its synonym; the random effects are ranef().

Examples

# \donttest{
set.seed(1)
df <- data.frame(x = rnorm(80))
df$y <- rpois(80, exp(0.5 + 0.3 * df$x))
fit <- tulpa(y ~ x, data = df, family = "poisson")
fixef(fit)
# }