[R] quick question about lme()

[ONKELINX, Thierry]

Both specifications are the same model. An intercept is added by default unless you use +0 or -1
like ~0 + LEAD|GRP or ~ -1 + LEAD|GRP
________________________________________
Van: r-help-bounces op r-project.org [r-help-bounces op r-project.org] namens YA [xinxi813 op 163.com]
Verzonden: zaterdag 14 april 2012 18:33
Aan: r-help op r-project.org
Onderwerp: [R] quick question about lme()

Hi everyone,

I have a quick question about the random part in lme().

Here is the code:

> lme(WBEING~HRS+LEAD+G.HRS,random=~LEAD|GRP)

I want to specify both random intercept and random slope of LEAD. Is the
random intercept already in it? or should I specify it like:

> lme(WBEING~HRS+LEAD+G.HRS,random=~1+LEAD|GRP)     ?

Thank you very much.

Best regards,

YA

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