Dear all,
I have follwing factors in my data set (G)
names(G)
relative ht, biomass, treatment, variety, soil group
relative height
biomass
treatment (4 levels)- control+lime, control+ash, contaminated soil+lime,
contaminated soil+ash
variety (4 levels)- Salix swherinii, Salix mursinifolia, Klara, Karin
soilgroup (2 level)- control and contaminated
if I fit aov function this is ok
anova1<-aov(ht~treatment*variety,data=G)
summary(anova1)
R- output
Df Sum Sq Mean Sq F value
Pr(>F)
treatment 3 14015 4672 65.021 < 2e-16
***
variety 3 5883 1961 27.295
2.95e-12 ***
treatment:variety 9 5474 608 8.465 8.93e-09 ***
Residuals 80 5748 72
---
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
above I can see my treatment and variety interaction effect
anova3<-aov(ht~treatment*variety*soilgroup,data=G)
summary(anova3)
R-ouput
Df Sum Sq Mean Sq F value
Pr(>F)
treatment 3 14015 4672 65.021 < 2e-16
***
variety 3 5883 1961 27.295
2.95e-12 ***
treatment:variety 9 5474 608 8.465 8.93e-09 ***
soilgroup -missing
treatment:variety:soilgroup - missing
Here, I am missing value of soil group and interation of treatment: variety:
soilgroup- Can any one please tell me why?
Thanks for help
Best regards
Salam
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