IntertidalAlgae | R Documentation |
Area coverage of red algae (Mazzaella parksii) in two herbivore
treatments (herbivores
) at two tide levels (height
).
IntertidalAlgae
A data frame with 64 observations on the following 3 variables.
a factor with levels low
and
mid
a factor with levels minus
and
plus
a numeric vector
Harley, C.D.G. 2003. Individualistic vertical responses of interacting species determine range limits across a horizontal gradient. Ecology 84: 1477-1488.
str(IntertidalAlgae)
# Using * includes the main effects and the interaction
aov.fit <- aov(sqrt.area ~ herbivores * height, data = IntertidalAlgae)
summary(aov.fit)
lm.fit <- lm(sqrt.area ~ herbivores * height, data = IntertidalAlgae)
anova(lm.fit)
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