## Level Names for a Factor

## Usage

    levels(x)
    levels(x) <- value

## Description

`levels` provides access to the levels attribute of factor. The first form prints the levels of the observations and the second sets the levels. In this case, `value` must be a vector of character strings with length equal to the number of levels of `x`.

To find out how many levels a factor has user the function `nlevels`.

## See Also

`factor`, `nlevels`.

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