offset {stats} R Documentation

## Include an Offset in a Model Formula

### Description

An offset is a term to be added to a linear predictor, such as in a generalised linear model, with known coefficient 1 rather than an estimated coefficient.

### Usage

offset(object)


### Arguments

 object An offset to be included in a model frame

### Details

There can be more than one offset in a model formula, but - is not supported for offset terms (and is equivalent to +).

### Value

The input value.

model.offset, model.frame.
For examples see glm and Insurance in package MASS.