R: Mahalanobis for AWC

mahalanodisc {fpc} | R Documentation

## Mahalanobis for AWC

### Description

Vector of Mahalanobis distances or their root. For use in `awcoord` only.

### Usage

    mahalanodisc(x2, mg, covg, modus="square")

### Arguments

`x2` | numerical data matrix.
`mg` | mean vector.
`covg` | covariance matrix.
`modus` | "md" (roots of Mahalanobis distances) or "square" (original squared form of Mahalanobis distances).

### Details

The covariance matrix is inverted by use of `solvecov`, which can be expected to give reasonable results for singular within-class covariance matrices.

### Value

vector of (rooted) Mahalanobis distances.

### Author(s)

Christian Hennig c.hennig@ucl.ac.uk http://www.homepages.ucl.ac.uk/~ucakche/

### See Also

`awcoord`, `solvecov`

### Examples

      options(digits=3)
      x <- cbind(rnorm(50),rnorm(50))
      mahalanodisc(x,c(0,0),cov(x))
      mahalanodisc(x,c(0,0),matrix(0,ncol=2,nrow=2))

[Package fpc version 2.1-10 Index]