nlevels {base}
The Number of Levels of a Factor
Description
Return the number of levels which its argument has.
Usage
nlevels(x)
Arguments
- x
- an object, usually a factor.
Details
This is usually applied to a factor, but other objects can have levels. The actual factor levels (if they exist) can be obtained with the levels function.
Values
The length of levels(x), which is zero if x has no levels.
Documentation reproduced from R 2.15.3. License: GPL-2.