[R] ANOVA with two random factors

[gbrenes at ssc.wisc.edu]

> Hi.
>
> I have been learning R in order to use it for a class in design of
> experiments.
>
> I have been using the command lme() to reproduce results from Montgomery's
> book "Design and Analysis of experiments".
>
> I have a quantitative response variable called capacity, and two random
> treatment factors: operator and part (already declared as factors in R).
>
> I have been trying to estimate this model with the command:
>
>
>
> lme(capacity~1,random=~1| (part*operator))
>
> This worked for the analysis with just one random factor, but now it´s not
> working.  Could anyone tell me how would be the correct syntax?  I would
> highly appreciate it.
>
>
> Gilbert Brenes
>
>
>