[Rd] Orthogonal polynomial ANOVA or polynomial regression?

Dominick Samperi djsamperi at gmail.com
Thu Mar 24 16:53:27 CET 2011


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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