[R] lme model specification

From: Eric Hack <hack_at_tera.org>
Date: Fri 10 Jun 2005 - 03:38:49 EST

Dear All,  

I am trying to specify the following fixed effects model for lme:

y ~ constant1 - beta1*(x - beta2)

where y is the response, x is the independent variable, and the operators above are real arithmetic operations of addition, subtraction, and multiplication. I realize that this model is just a reparameterization of y=beta0+beta1*x, but I am using this parameterization because I am specifically interested in confidence bounds for beta2.  

I have looked at the help, but the closest hint I find is the I() function, and that does not seem to work this way.  

I confess that I am actually using S-plus, but there does not seem to be a resource like this list for S-plus.  

Any help would be greatly appreciated.  

Kind regards,


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