R: Compute Variance Inflation Factors for an unmarkedFit Object.

vif {unmarked} | R Documentation

## Compute Variance Inflation Factors for an unmarkedFit Object.

### Description

Compute the variance inflation factors (VIFs) for covariates in one level of the model (i.e., occupancy or detection). Calculation of VIFs follows the approach of function `vif` in package `car`, using the correlation matrix of fitted model parameters.

### Usage

    vif(mod, type)

### Arguments

`mod` | An unmarked fit object.
`type` | Level of the model for which to calculate VIFs (for example, `'state'`)

### Value

A named vector of variance inflation factor values for each covariate.

[Package unmarked version 1.0.0 Index]