[R] compute adjusted mean

From: Steven Lu <lukelu1983_at_yahoo.com>
Date: Thu 31 Mar 2005 - 04:56:40 EST

Dear Sir/Madam:
I have a question about computing adjusted mean using R. I am really new to this area.  

Suppose I have a response Y, and covariate: treat (binary), sex (binary) race (catogorical ) and age (continuous). the model: Y~treat+sex+race+age;
I am asked to compute the adjusted mean of Y for treat=1.  

would you please tell me (in detail) how I can do this? I searched the R homepage and got some information, but not quite helpful.  

thanks a lot,  

Steven L. Lu                       

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