Then pairs, including the last, are estimated until iteration i. For f > 1 factors, only the last factor is estimated (conditional on the earlier ones) in the first f − 1 iterations. When ai.loadings i is specified (default i = −1 specifies noĪction), it also prevents AI updates of some loadings during the first i iterations. Unless the user specifies constraints, ASReml sets them and rotates the loadings each iteration. Loadings that change sign are restricted to doubling in magnitude, and if the average change in magnitude of loadings is greater than 10-fold, they are all shrunk. After ASReml calculates updates for variance parameters, it checks whether the updates are reasonable and sometimes reduces them over and above any step.size shrinkage. UsageĪrguments in the form name = value, where name is the name of the optionĭetails The following settings can be altered:Ĭontrols modification to AI updates of loadings in extended factor-analytic ( fa) models. Asreml.options sets less frequently used asreml() options.
