R: Checks if fitted model is in gamma scale

is.gamma {asreml} | R Documentation

## Checks if fitted model is in gamma scale

### Description

This internal function is used in summary.asreml and vpredict to verify if the parameters and the inverse of the average information matrix are in gamma scale.

### Usage

    is.gamma(object)

### Arguments

`object` | An `asreml` object.

### Value

A Boolean value identifying if the model is in gamma scale. The `where.sigma2` attribure tells where the index of the `sigma2` in `vparameters` object of the `asreml` list object.

### Examples

    ## Not run:
    asr.oats <- asreml(
      fixed = yield ~ Variety * Nitrogen,
      random = ~ Blocks / Wplots,
      data = oats)

    is.gamma(asr.oats)

    ## End(Not run)

[Package asreml version 4.2.0.480 Index]