12.4.4 multivar computational options

compute eigenvalues

If this statement is present, the values given in either the eigenfile or the statement `set eigenvalues' are ignored and the eigenvalues are computed by the program. This is the default action if no eigenvalues are given.

use (full | partitioned) EM

Use this statement to choose between two iterative procedures in maximum likelihood estimates. With the `full EM' option, the fixed effects, additive and residual variance and covariance are simultaneously updated. This is the default action.

With the `partitioned EM' option, the maximization step is partitioned into two parts. The first part is to maximize the likelihood over additive and residual variances/covariances; the second part over residual variances/covariances and fixed effects. The expectation step is run after each part. Partitioned EM takes more computer time.

fit environmental model

This statement asks a purely environmental model with no genetic variances to be fit, in additional to the genetic/environmental model.