R help - Apr 2006 - Can't run code from "Mixed Effects Models in S and S-plus"

Dear R-users:

I can't run the following code from "Mixed Effects Models in S and
S-plus".

library( nlme )
options( width = 65, digits = 5 )
options( contrasts = c(unordered = "contr.helmert", ordered =
"contr.poly")
)

# Chapter 5    Extending the Basic Linear Mixed-Effects Models

# 5.1 General Formulation of the Extended Model

data( Orthodont )
vf1Fixed <- varFixed( ~ age )
vf1Fixed <- initialize( vf1Fixed, data = Orthodont )

Can anyone help me?

Thanks

"Joe Moore" <emgt_r at hotmail.com> writes:
> Dear R-users:
> 
> I can't run the following code from "Mixed Effects Models in S and
S-plus".
> 
> library( nlme )
> options( width = 65, digits = 5 )
> options( contrasts = c(unordered = "contr.helmert", ordered =
"contr.poly")
> )
> 
> # Chapter 5    Extending the Basic Linear Mixed-Effects Models
> 
> # 5.1 General Formulation of the Extended Model
> 
> data( Orthodont )
> vf1Fixed <- varFixed( ~ age )
> vf1Fixed <- initialize( vf1Fixed, data = Orthodont )
> 
> Can anyone help me?
initialize() in nlme's S3-class based code clashed with initialize()
in the methods package, so it got renamed as Initialize() (notice
capitalization).

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