[Rd] Orthogonal polynomial ANOVA or polynomial regression?

[Dominick Samperi]

Hi,

I have not been able to find R tools that permit an orthogonal polynomial
ANOVA analysis: single degree of freedom F-test comparisons including
L, Q, C, etc. terms. Do such tools exist?

I guess you can accomplish something similar by doing straightforward
polynomial regression and removing powers manually, combined with
ANOVA model comparisons.

Thanks,
Dominick