SAS/SPSS Mixed Model cov type translation to Julia (MixedModels.jl)

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1

I try to use MixedModels.jl.

Is any documentation how to translate SAS/SPSS random/repeated covariance type to julia MixedModels.jl notation?

for example:

RANDOM  Fact1/TYPE=FA0(2) SUB=Fact2 G;
REPEATED/GRP=Fact1 SUB=Fact2;

where Fact1 and Fact2 - factors.

How to fit:

  • CSH (Heterogenous compound symmetry)
  • UN (Unstructured)
  • VC (Variance components)
  • AR1 (First-order autoregressive)

How to explain the relationship between these types and Julia MixedModels.jl notation to SAS users?

2

The model formula syntax that MixedModels.jl uses is largely (but not exactly) the same as the what the R package lme4 uses, so that might help you find some translation resources.