vcov.addreg {addreg} | R Documentation |

## Calculate Variance-Covariance Matrix for a Fitted addreg Model Object

### Description

Returns the variance-covariance matrix of the main parameters of a fitted `addreg`

model object.

### Usage

```
## S3 method for class 'addreg'
vcov(object, ...)
```

### Arguments

`object` |
an object of class |

`...` |
additional arguments for method functions. |

### Details

An equivalent method to `vcov`

, to use with `addreg`

models.

### Value

A matrix of the estimated covariances between the parameter estimates in the linear or
non-linear predictor of the model. This should have row and column names corresponding
to the parameter names given by the `coef`

method.

### Note

If `object$boundary == TRUE`

, the standard errors of the coefficients
are not valid, and a matrix of `NaN`

s is returned.

### Author(s)

Mark W. Donoghoe markdonoghoe@gmail.com

### See Also

### Examples

```
## For an example, see example(addreg)
```

[Package

*addreg*version 3.0 Index]