R: The Vowel Data Set

Vowel {clues} | R Documentation

## The Vowel Data Set

### Description

The vowel data set studied in Hastie, Tibshirani and Friedman (2001).

### Usage

    data(Vowel)

### Details

In the original vowel data set, the 11 different words, with each one representing a vowel sound, correspond to 11 different clusters. There are 528 training observations and 462 testing observations. The training observations are employed to asset the performance of the `clues` algorithm in Wang et al. (2007) and refered as the Vowel data set. The 10 dimensional data was projected into a 2-dimensional space for examination purpose according to the method described in Hastie, Tibshirani and Friedman(pages 84, 92, 2001).

### Value

A list consists of a 528 by 2 data matrix and a 528 by 1 cluster membership vector. There are 11 clusters each containing 48 data points in a two-dimensional space.

### References

Hastie, T., Tibshirani, R., Friedman, J. (2001) The elements of statistical learning. Springer-Verlag.

Wang, S., Qiu, W., and Zamar, R. H. (2007). CLUES: A non-parametric clustering method based on local shrinking. Computational Statistics & Data Analysis, Vol. 52, issue 1, pages 286-298.

### Examples

        data(Vowel)

        # data matrix
        vowel <- Vowel$vowel

        # 'true' cluster membership
        vowel.mem <- Vowel$vowel.mem

        # scatter plots
        plotClusters(vowel, vowel.mem)

[Package clues version 0.6.2.2 Index]