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lmeoptimize
2006 Mar 16
1
lme4/Matrix: Call to .Call("mer_update_y"...) and LMEoptimize gives unexpected side effect...
...= "Matrix")
mer1u <- LMEoptimize(mer, lmerControl(mer))
What puzzles me is that this call alters my original model fm2 as some kind of side effect. In fact, after the call fm2 is the same as mer1u. Is this side effect intentional and is it possible to avoid?
A detail is that "LMEoptmize" and "LMEoptimize<-" are not exported from the namespace in Matrix, so I simply copied the LMEoptimize function and made it an ordinary function as shown below.
Thanks in advance
S?ren
LMEoptimize <- function(x, value)
{
if (value$msMaxIter <...