On Mar 24, 2011, at 16:53 , Dominick Samperi wrote: > 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.
(Why R-devel? This is a plain R-help thing.) Look up contr.poly(), and poly(). Notice that for unbalanced designs, you still need to remove terms one at a time. -- Peter Dalgaard Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
