On Dec 17, 2009, at 5:14 PM, Clara Yuan wrote:
Hello,
(Also, why are the coefficients renamed to t.L, t.Q, etc instead of
t.1, t.2?)
You have coded your t variable as an ordered factor.
?ordered
if you do not want the linear, quadratic, cubic coefficients for the
polynomial contrasts, then remove the ordering with:
t <- factor(t, is.ordered=FALSE)
... and rerun the analysis.
--
David
What am I missing?
Thanks for the help,
Clara
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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