search for: lmechgpt

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2006 Oct 16
1
linear mixed effects models with breakpoints
...del in the nlme package, with terms for random effects due to repeated measures on individuals and the corCAR1 serial correlation structure. However, there is some suggestion in the data (and from theory) that a breakpoint (change point) model may be more appropriate. Scott, Norman and Berger's lmeChgPt model seems to go some way to fitting the requirements for such a model but does not incorporate, as I understand it, a serial correlation structure. Is anyone aware of a model fitting procedure that incorporates the correlation structures of the lme models in a breakpoint model? Kind regards, E...