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rmac01
2013 Jan 23
1
mixed effects meta-regression: nlme vs. metafor
...on the
web, you once were able to prevent the fitting of the extra variance
parameter in some pre-1998 S-plus versions of nlme using a
"lmeControl(sigma=1)" option, but this does not appear to available any
more.
I again get /almost/ what I want using the "metafor" package:
rma01 <- rma(yi = effect,
vi = se2,
mods = ~ treatment + treatment*time - time - 1,
data = dat)
"rma()" will correctly digest the provided standard errors, but this
time the problem is that "rma()" will always treat each line in the dat...