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Hi all,
Try the Contrast option in Proc Mixed.
Hope it helps.
Llorenç Badiella
Servei d'Estadística UAB
En/Na barrere Bendia ha escrit:
> Hi SAS-L freinds there.
> I'm using proc mixed and I wante to test the difference between two
> parameters (B1 and B2) of two independents dummies variables: time0*c1traj1
> and time*c1traj1 ( and many others: time0*c1traj(k) time*c1traj(k),
> k=1,2....10). I tried:
> estmate 'time0 vs time' time0*c1traj1 -time*c1traj1 1 1 . But It didn't work.
> I tried other thing, but I had a message like this: the variables must be in
> model.
> Please, have you any ideas?
>
> proc mixed data=un noclprint covtest METHOD=reml covtest;
> class family children;
> model prosocia= time sex agecent transit*time
>
> time0*c1traj1 time0*c1traj2 time0*c1traj3 time0*c1traj4
>
> time*c1traj1 time*c1traj2 time*c1traj3 time*c1traj4
>
> /************************************/
> / solution notest ddfm=bw outp=ponde;
> random intercept time /subject=family type=un gcorr ;
> random sex_enfa /subject=family ;
> random intercept /subject=children(family ) ;
> estimate 'time0_traj1 vs time_traj1
> time0*c1traj1-time0*c1traj1 1 -1;
> weight meanpond;
> run;
>
> I would be grateful if you could help me.
> Thanks a lot.
> =====================
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