R: Fit Same Mean Different Variance Model

fitSameMeanDifferentVarianceModel {compositions} | R Documentation

## Fit Same Mean Different Variance Model

### Description

Fits a model of the same mean, but different variances model to a set of several multivariate normal groups by maximum likelihood.

### Usage

    fitSameMeanDifferentVarianceModel(x)

### Arguments

`x` | list of rmult type datasets

### Details

The function tries to fit a normal model with different variances but the same mean between different groups.

### Value

`mean` | the estimated mean
`vars` | a list of estimated variance-covariance matrices
`N` | a vector containing the sizes of the groups

### Author(s)

K.Gerald v.d. Boogaart http://www.stat.boogaart.de

### References

Aitchison, J. (1986) The Statistical Analysis of Compositional Data Monographs on Statistics and Applied Probability. Chapman & Hall Ltd., London (UK). 416p.

### See Also

`acompNormalLocation.test`

### Examples

    fitSameMeanDifferentVarianceModel

[Package compositions version 2.0-2 Index]