yes, you should be able to follow the same examples, just use 3 classes 
instead of 4, and just specify the one or 2 covariates.

doug

Kelly Silva wrote:
> Hello,
>    We are using the DODS model and we saw on the Freesurfer`s tutorial 
> that we can create an fsgd with DODS contrast with 4 groups and 1 
> covariate. We have 3 groups and we want to use 1 or 2 covariates. Is 
> it posible to run this analysis? If so, how can we do that?
>                                               Thanks in advance and 
> best regards,
>                                                                               
>  
> Kelly
>
>  
> ------------------------------------------------------------------------
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