# coef

##### Extract Model Coefficients

`coef`

is a generic function which extracts model coefficients
from objects returned by modeling functions. `coefficients`

is
an *alias* for it.

- Keywords
- models, regression

##### Usage

```
coef(object, ...)
coefficients(object, ...)
```

##### Arguments

- object
- an object for which the extraction of model coefficients is meaningful.
- ...
- other arguments.

##### Details

All object classes which are returned by model fitting functions
should provide a `coef`

method or use the default one.
(Note that the method is for `coef`

and not `coefficients`

.)

Class `"aov"`

has a `coef`

method that does not report
aliased coefficients (see `alias`

).

##### Value

- Coefficients extracted from the model object
`object`

.For standard model fitting classes this will be a named numeric vector. For

`"maov"`

objects (produced by`aov`

) it will be a matrix.

##### References

Chambers, J. M. and Hastie, T. J. (1992)
*Statistical Models in S*.
Wadsworth & Brooks/Cole.

##### See Also

`fitted.values`

and `residuals`

for related methods;
`glm`

, `lm`

for model fitting.

##### Examples

`library(stats)`

`x <- 1:5; coef(lm(c(1:3, 7, 6) ~ x))`

*Documentation reproduced from package stats, version 3.3, License: Part of R 3.3*

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