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start values for random effects in nlme
Lindsey Root
·
Mar 1, 2005
·
r-help
I am attempting to run an exponential decay model in nlme with 3 fixed and random effects (an initial value, an asymptote, and a decay rate). I am having trouble getting convergence now that I have added the asymptote to...
test of significance for nlme coefficients
Lindsey Root
·
Mar 4, 2005
·
r-help
Hello, I am using the nlme package to fit an exponential decay model to a longitudinal data set: > ##Model a variable called RASCH16A as an exponential function ## of an initial value "A" and a decay rate "K" > fm2 <- nlme(model...
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