coef {stats} | R Documentation

## Extract Model Coefficients

### Description

`coef` is a generic function which extracts model coefficients from objects returned by modeling functions. `coefficients` is an alias for it.

### 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

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

[Package stats version 3.3.2 Index]