na.action {stats} | R Documentation

## NA Action

### Description

Extract information on the NA action used to create an object.

### Usage

    na.action(object, ...)

### Arguments

`object` | any object whose `NA` action is given.
`...` | further arguments special methods could require.

### Details

`na.action` is a generic function, and `na.action.default` its default method. The latter extracts the `"na.action"` component of a list if present, otherwise the `"na.action"` attribute.

When `model.frame` is called, it records any information on `NA` handling in a `"na.action"` attribute. Most model-fitting functions return this as a component of their result.

### Value

Information from the action which was applied to `object` if `NA`s were handled specially, or `NULL`.

### References

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

### See Also

`options("na.action")`, `na.omit`, `na.fail`, also for `na.exclude`, `na.pass`.

### Examples

    na.action(na.omit(c(1, NA)))

[Package stats version 2.15.2 Index]