Dear all,
My name is James Rizopoulos and I am a new S plus 2000
user for Windows
I would like to know if there is any function in S
plus for Mixed Models for Longitudinal Data
yi = Xi β + Zi ui + εi
i = 1,2,?,N individuals
j = 1,2,?,ni observations for individual i
where
yi = ni x 1 response vector for individual i
Xi = ni x p design matrix for the fixed effects
β = p x 1 vector of unknown fixed parameters
Zi = ni x r design matrix for the random effects
ui = r x 1 vector of unknown random effects
εi = ni x 1 residual vector
with
εi ~ NID(0, σ2 Ιni)
ui ~ NID(0, Σu)
Thank you all for your help and for your time
=====
James Rizopoulos Undergraduate Student
Department of Statistics
Athens University of Economics and Business
Greece
____________________________________________________________
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