Skip to contents

Create a zero-inflated binomial specification

Source: R/zi.R
zi_binomial.Rd

Create a zero-inflated binomial specification

Usage

zi_binomial(formula = NULL)

Arguments

formula

Optional formula for the zero-inflation probability. If NULL, uses intercept-only model for P(structural zero).

Value

A ratiod_zi object

Examples

# Intercept-only ZI
zi_binomial()
#> tulpaRatio Zero-Inflation Specification
#> ==================================
#> Type: Zero-Inflated Binomial 
#> Formula: ~ 1 (intercept only)

# ZI probability depends on a covariate
zi_binomial(~ habitat)
#> tulpaRatio Zero-Inflation Specification
#> ==================================
#> Type: Zero-Inflated Binomial 
#> Formula: ~habitat