offset
Include an Offset in a Model Formula
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.
 Keywords
 models
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.
See Also
For examples see glm
and
Insurance
in package \href{https://CRAN.Rproject.org/package=#1}{\pkg{#1}}MASSMASS.
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