[R] anova-interaction

[Bruno Grimaldo Martinho Churata]

HI,

I am trying to perform ANOVA with 2 factors:
material (3), temperature(3). The interaction is significant. I tried
something like, ( summary(avt, split=list("temp:mat"=list("15"=1, 
"70"=2, "125"=3))) is not correct).
Thanks,

av <- aov(time ~ mat*temp, data=dados)
avt <- aov(time ~ temp/mat)
summary(avt, split=list("temp:mat"=list("15"=1, "70"=2, "125"=3)))
avm <- aov(time ~ mat/temp)
summary(amv, split=list("mat:temp"=list("1"=c(1,4), "2"=c(2,5), 
"3"=c(3,6))))

data
    time mat temp
1   130   1   15
2   155   1   15
3    74   1   15
4   180   1   15
5   150   2   15
6   188   2   15
7   159   2   15
8   126   2   15
9   138   3   15
10  110   3   15
11  168   3   15
12  160   3   15
13   34   1   70
14   40   1   70
15   80   1   70
16   75   1   70
17  136   2   70
18  122   2   70
19  106   2   70
20  115   2   70
21  174   3   70
22  120   3   70
23  150   3   70
24  139   3   70
25   20   1  125
26   70   1  125
27   82   1  125
28   58   1  125
29   25   2  125
30   70   2  125
31   58   2  125
32   45   2  125
33   96   3  125
34  104   3  125
35   82   3  125
36   60   3  125