Can "lme" build a linear mixed effects model without random intercept?

["Ramen Bu" <iscenario@hotmail.com>]

Dear all,

S-plus 6.0 in Win 2000.

I've built a model with one intercept random effect and one time random 
effect, the computer code as below.
lme1 _ lme ( fixed = Y ~ A + B ,
            random = ~ time | seq,
            na.action = na.omit)

If I want to build a model the same as above, except do not put in the 
random time effect, I can write the code
lme1 _ lme ( fixed = Y ~ A + B ,
            random = ~ 1 | seq,
            na.action = na.omit)

The question is : Can I build a model only with the time random effect, that 
is, do not put in the random intercept effect?
Thanks!

Ramen



_________________________________________________________________
Chat with friends online, try MSN Messenger: http://messenger.msn.com