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Hi, Given that R reports Type I sums of squares, isn't it a bit anachronistic that it re-orders terms in formulae? > d <- expand.grid(y=rnorm(8), + A=factor(c(1,2)), + B=factor(c(1,2)), + C=factor(c(1,2))) > summary(aov(y ~ A+B+A:B+C,data=d)) Df Sum Sq Mean Sq F value Pr(>F) A 1 8.294e-34 8.294e-34 1.027e-33 1

Hallo all I went through all files and through some books I have, but still I am not completely sure about the correct aov syntax. Suppose I have a dataset divided to three portions, according to a factor "mereni" which is a measurement day. There is another factor named "frakce" (Each sample is divided into three distinct fractions according to its particle size). samp