procrustes {MCMCpack} | R Documentation

## Procrustes Transformation

### Description

This function performs a Procrustes transformation on a matrix `X` to minimize the squared distance between `X` and another matrix `Xstar`.

### Usage

    procrustes(X, Xstar, translation = FALSE, dilation = FALSE)

### Arguments

`X` | The matrix to be transformed.
`Xstar` | The target matrix.
`translation` | logical value indicating whether `X` should be translated.
`dilation` | logical value indicating whether `X` should be dilated.

### Details

`R`, `tt`, and `s` are chosen so that:

s X R + 1 tt' \approx X^*

`X.new` is given by:

X_{new} = s X R + 1 tt'

### Value

A list containing: `X.new` the matrix that is the Procrustes transformed version of `X`, `R` the rotation matrix, `tt` the translation vector, and `s` the scale factor.

### References

Borg and Groenen. 1997. Modern Multidimensional Scaling. New York: Springer. pp. 340-342.

### See Also

`MCMCirtKd`

[Package MCMCpack version 1.5-0 Index]