[R] define F-ratio computations with aov

Galanidis Alexandros agal at env.aegean.gr
Wed Mar 17 09:25:24 CET 2010


Greetings to all,

This is my model: aov.fit<-aov(Y~A+B+C+D+E+A:C+A:E)

In summary(aov.fit) all F values are comptuted by eg MS(A)/MS(Residuals). This is not correct (or what I want), except for F(B) and F(A:E). I suppose P values are not correct either.

Is it possible with aov to define the way F computations will be done? I 'd like them to be like this: F(A)=MS(A)/MS(E), F(C)=MS(C)/MS(E), F(D)=MS(D)/MS(E), F(E)=MS(E)/MS(A:E), F(A:C)=MS(A:C)/MS(A:E)

thanks


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