# SAS/SPSS Mixed Model cov type translation to Julia (MixedModels.jl)
**URL:** https://discourse.julialang.org/t/sas-spss-mixed-model-cov-type-translation-to-julia-mixedmodels-jl/22258
**Category:** Statistics
**Tags:** question, documentation
**Created:** [March 23, 2019, 11:01pm UTC](https://discourse.julialang.org/t/sas-spss-mixed-model-cov-type-translation-to-julia-mixedmodels-jl/22258 "2019-03-23T23:01:11Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@PharmCat](https://discourse.julialang.org/u/PharmCat)
#### Post date: [March 23, 2019, 11:01pm UTC](https://discourse.julialang.org/t/sas-spss-mixed-model-cov-type-translation-to-julia-mixedmodels-jl/22258/1 "2019-03-23T23:01:11Z")
I try to use **[MixedModels.jl](https://github.com/dmbates/MixedModels.jl)**.
Is any documentation how to translate SAS/SPSS random/repeated covariance type to julia MixedModels.jl notation?
for example:
```julia
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?
---
### Author:  [@dave.f.kleinschmidt](https://discourse.julialang.org/u/dave.f.kleinschmidt)
#### Post date: [March 28, 2019, 4:42pm UTC](https://discourse.julialang.org/t/sas-spss-mixed-model-cov-type-translation-to-julia-mixedmodels-jl/22258/2 "2019-03-28T16:42:06Z")
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.