ntypes: Number of Unique Elements

Description

Find the number of unique elements in a vector.

Usage

ntypes (vector)

Arguments

vector

The vector of interest.

Details

A simple function that converts a vector to a factor, and finds the number of levels. This provides the number of unique elements in a vector, something I find I frequently need.

Examples

Run this code

data (pb52)
## the number of unique vowel categories.
ntypes (pb52$vowel)

Run the code above in your browser using DataLab