Displaying 3 results from an estimated 3 matches for "fm3oxid".
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fm3oxide
2006 Mar 29
1
lmer multilevel
...9;m having matching lme and lmer
examples in P&B.
using Matix 0.995
In the Oxide example in p167-170 I can't get the level 2 coefficient
estimates to match
the fm1Oxide model in lme is
data(Oxide,package="nlme")
lme(Thickness~1,Oxide)
which I translate in Lmer syntax to
fm3Oxide<-lmer(Thickness~ (1|Lot)+(1|Lot:Wafer),data=Oxide)
#or alternatively which gives the same result
Oxide$LW<-with(Oxide,Lot:Wafer)[drop=TRUE]
fm4Oxide<-lmer(Thickness~ (1|Lot)+(1|LW),data=Oxide)
however if you look at say Lot 8, lme gives
8 1993.767
8/1 1993.677
8/2 1995.170
8...
2006 Mar 29
1
Lmer BLUPS: was(lmer multilevel)
...39;m having matching lme and lmer
examples in P&B.
using Matix 0.995
In the Oxide example in p167-170 I can't get the level 2 coefficient
estimates to match the fm1Oxide model in lme is
data(Oxide,package="nlme")
lme(Thickness~1,Oxide)
which I translate in Lmer syntax to
fm3Oxide<-lmer(Thickness~ (1|Lot)+(1|Lot:Wafer),data=Oxide) #or
alternatively which gives the same result
Oxide$LW<-with(Oxide,Lot:Wafer)[drop=TRUE]
fm4Oxide<-lmer(Thickness~ (1|Lot)+(1|LW),data=Oxide)
however if you look at say Lot 8, lme gives
8 1993.767
8/1 1993.677
8/2 1995.170
8...
2006 Feb 08
2
lme syntax for P&B examples
Hi helpeRs,
I've been working through some examples in Pinhiero & Bates( 2000)
trying to understand how to translate to the new Lme4 syntax but without
much luck.
Below is what I think I should do, but either the answers don't come out
the same or I get errors.
In the Oxide problems I'm particularly interested in obtaining the
levels coeficients but this options no longer seems