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2008 Nov 17
1
Type III ANOVA of package car depends on factor level order
## Question1: How to define IV with interaction alone, without main effects?
## Question2: Should Type III ANOVA in package car be independent of
the factor level order?
## data from http://www.otago.ac.nz/sas/stat/chap30/sect52.htm
drug <- c(t(t(rep(1,3)))%*%t(1:4));
disease <- c(t(t(1:3)) %*% t(rep(1,4)));
y <- t(matrix(c(
42 ,44 ,36 ,13 ,19 ,22
,33 ,NA ,26 ,NA ,33 ,21
,31 ,-3 ,NA