[Rd] Orthogonal polynomial ANOVA or polynomial regression?

From: Dominick Samperi <djsamperi_at_gmail.com>
Date: Thu, 24 Mar 2011 11:53:27 -0400


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.


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