test_zero_inflation: Test for zero inflation

In tulpa: Templated Unified Library for Posterior Approximation in Bayesian Hierarchical Models

Test for zero inflation

Description

Compares the number of zeros in observed data to the distribution expected under the fitted model. Equivalent to DHARMa::testZeroInflation().

Usage

test_zero_inflation(object, ...)

## Default S3 method:
test_zero_inflation(object, observed = NULL, nsim = 250L, seed = 123L, ...)

Arguments

object	A fitted model with simulate() method
...	Passed to methods.
observed	Observed response vector (optional)
nsim	Number of simulations (default 250)
seed	Random seed (default 123)

Value

An htest object with zero-inflation ratio and p-value

Examples

set.seed(1)
d <- data.frame(x = rnorm(80))
d$y <- rpois(80, exp(0.3 + 0.5 * d$x))
fit <- tulpa(y ~ x, data = d, family = "poisson", mode = "laplace")
test_zero_inflation(fit, nsim = 50)

tulpa documentation built on Oct. 19, 2026, 5:09 p.m.