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shedi
2003 Nov 05
0
Re: [S] LME - fixed effects model and missing values
Here is an answer to a 1999 post. I didn't find a direct answer anywhere
on the Web, perhaps because it is "obvious" once one sees it.
Suppose you have data from a longitudinal study, where each subject was
measured *up to* four times, with missing measurements, so that the data
look like this:
> MAT<- structure(c(23, 24, 6, 19, 16, 20, 13, 11, NA, 8, NA, 21, 19, 15,
11,