Bioequivalence and Bioavailability Forum • Mean as intercept; model matrices

Mean as intercept; model matrices [🇷 for BE/BA]

posted by Aceto81 – Belgium, 2009-05-26 12:28 (6223 d 05:58 ago) – Posting: # 3760
Views: 13,741

There is another way:
first substract the intercept, then add an offset, which is always fit with coefficient 1:
If you take the mean as an offset, you get an error: "lengths differ", so if you use ave, you get:

lm(formula = lnY ~ Trt + Subj + Seq + Per - 1 + offset(ave(lnY)))

Ace

Complete thread:

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