#Positive.zero asreml code#
The SAS code is not that disimilar, except for the clear demarcation between data processing (data step, for reading files, data transformations, etc) and specific procs (procedures), in this case to summarize data, produce a boxplot and fit a mixed model. If constraints are not set for factor analytic models with more than one factor, asreml() will set them internally and rotate the loadings each iteration (rotate.faTRUE). Two cases arise: whether the singularity arises because of an effect has zero variance or whether it arises as a linear dependence.
# speciesE.bosistoana -235.95 -449.07 -37.19 1361 0.036 * If FALSE (the default), asreml() initially constrains the rst k 1 loadings for higher order (k > 1) factors in factor analytic models to zero. In this case, asreml proceeds using lagrangian multipliers to process the matrix.
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