[R] Package 'nlme' linear mixed effects model error "unexpected symbol"

[msherwood]

I am trying the following code with the 'nlme' package:

2007model<lme(Rank~Age*Mass+method='ML',random=~1|ID,na.action=na.exclude)

I've also tried all kinds of variations of the above that I could think of.

It gives me the error "unexpected symbol in '2007model' ". I'm not sure if
this 'unexpected symbol' refers to the code I enter or the data table I am
using.

I haven't found any useful information in a Google search or in the R help
files.

Any suggestions of what the problem may be?







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