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incon
2010 Oct 15
2
How to extract parameter estimates of variance function from lme fit
Dear R-Users,
I have a question concerning extraction of parameter estimates of
variance function from lme fit.
To fit my simulated data, we use varConstPower ( constant plus power
variance function).
fm<-lme(UPDRS~time,data=data.simula,random=~time,method="ML",weights=varConstPower(fixed=list(power=1)))
I extract the results of this function by using the following codes:
2011 Jun 01
3
error in model specification for cfa with lavaan-package
...data = data, group = group, sample.cov = sample.cov, sample.mean = sample.mean, : sample covariance can not be inverted"
Then I tried to "lavaanify" my model specification first
cfa.model<- lavaanify(cfa.model)
id lhs op rhs user group free ustart fixed.x label eq.id free.uncon
1 1 f1 =~ x1 1 1 1 NA 0 f1=~x1 0 1
2 2 f1 =~ x2 1 1 2 NA 0 f1=~x2 0 2
3 3 f1 =~ x3 1 1 3 NA 0 f1=~x3 0 3
4 4 f1 =~ x4 1 1 4 NA 0 f1=~x4 0 4
5 5 ...
2004 Oct 03
1
creating new varFunc classes in nlme .. error: "Don't know how to get coefficients for .. object"
...itialize.varExp2
all seem to work properly after I construct them. I
can successfully use the commands:
v2 <- varExp2(form = ~age|Sex,fixed = c(Female=0))
v2 <- Initialize(v2, Orthodont)
But, after this when I type "v2" at the prompt, I get
the message:
Error in coef.varFunc(x, uncons = FALSE, allCoef =
TRUE) : Don't know how to get coefficients for varExp2
object
Im not sure what to do. Im sure it is a simple fix or
statement I need to enter. Can anyone offer
suggestions? Do I have to use the command
varFunc(varExp2) at some point?
As background, I created VarExp2 by...