fa.init {asreml} | R Documentation

## Factor analytic initial values

### Description

Estimate initial parameter values for factor analytic models from the observed variance-covariance matrix.

### Usage

    fa.init(data, model, scale = 1)

### Arguments

`data` | A data frame containing the response and the base factors in the factor analytic (compound) model term.
`model` | A two sided formula with the response on the left and a first order interaction with a factor analytic model term on the right. Valid factor analytic model functions are `"sfa"`, `"facv"`, `"fa"` or `rr` with an optional argument `k` specifying the order of the factor analytic model. Other model functions are not allowed.
`scale` | Scales the variance-covariance matrix prior to calculating the parameter estimates (default is 1.0).

### Value

A numeric vector of specific variances followed by the loadings if the factor analytic function is `fa` or `rr`, otherwise a numeric vector of loadings followed by the specific variances.

### Examples

    ## Not run:
    init <- fa.init(data, fa(site,2):variety)

    ## End(Not run)

[Package asreml version 4.1.0.176 Index]