vvalen {dprep} | R Documentation

## The Van Valen test for equal covariance matrices

### Description

The Van Valen nonparametric test for homocedasticity (equal covariance matrices).

### Usage

    vvalen(data)

### Arguments

`data` | The name of the dataset to be tested

### Value

Gives the p-value for a Kruskal Wallis test. A p-value near to zero indicates homocedasticity.

### Author(s)

Edgar Acuna

### References

Van Valen, L. (1962). A study of fluctuating asymmetry. Evolution Vol. 16, pp. 125142.

### See Also

`mardia`

### Examples

    #---------Testing homocedasticity-----
    data(colon)
    vvalen(colon)

[Package dprep version 1.0 Index]