[R] Command for simple effects following 2 way anova with interaction

Ashim Kapoor ashimkapoor at gmail.com
Thu Dec 1 04:55:23 CET 2016

Dear All,

Suppose I do :-

model1<- aov(breaks ~ wool*tension,data = warpbreaks)

There is significant interaction. So I need to test for simple effects of
wool at each level of  tension and vice versa. I can do a subset and then
do a one way anova for each level of tension and wool. My query is that is
there any command programmed which can do this automatically?

Best Regards,

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