[R] 2^2 factorial design question

[(Ted Harding)]

On 07-Nov-08 00:53:56, Edna Bell wrote:
> Dear R Gurus:
> 
> How do you put together a 2^2 (or even 2^k) factorial problem, please?

I'm not clear about what you mean here, especially about "put together"!
Can you describe what you want to end up with in more detail?

> Since you have 2 levels for A and B, do you put in "A+" and "A-" as
> factors, please?

In any case, I would not use the names "A+" and "A-", since this
provides too many opportunities for expressions involving these
to be interpreted as arithmetic operations. Better, and safer,
to use names "A1" and "A0", say.

Best wishes,
Ted.

> Thanks,
> Edna Bell

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Date: 07-Nov-08                                       Time: 09:51:39
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