FLXMRziglm {flexmix} | R Documentation

## FlexMix Interface to Zero Inflated Generalized Linear Models

### Description

This is a driver which allows fitting of zero inflated poisson and binomial models.

### Usage

    FLXMRziglm(formula = . ~ ., family = c("binomial", "poisson"), ...)

### Arguments

`formula` | A formula which is interpreted relative to the formula specified in the call to `flexmix` using `update.formula`. Default is to use the original `flexmix` model formula.
`family` | A character string naming a `glm` family function.
`...` | passed to `FLXMRglm`

### Value

Returns an object of class `FLXMRziglm`.

### Note

In fact this only approximates zero inflated models by fixing the coefficient of the intercept at -Inf and the other coefficients at zero for the first component.

### Author(s)

Friedrich Leisch and Bettina Gruen

### Examples

      data("dmft")
      Model <- FLXMRziglm(family = "poisson")
      Fitted <- flexmix(End ~ log(Begin + 0.5) + Gender + Ethnic + Treatment,
      model = Model, k =2 , data = dmft,
      control = list(minprior=0.01))
      summary(refit(Fitted))

[Package flexmix version 2.2-4 Index]