RVAideMemoire (version 0.9-83-12)

adonis.II: Type II permutation MANOVA using distance matrices

Description

This function is a wrapper to adonis2 but performs type II tests (whereas adonis2 performs type I).

Usage

adonis.II(formula, data, ...)

Value

a data frame of class "anova".

Arguments

formula

a typical model formula such as Y~A+B*C, but where Y is either a dissimilarity object (inheriting from class "dist") or data frame or a matrix; A, B, and C may be factors or continuous variables.

data

the data frame from which A, B and C would be drawn.

...

additional arguments to adonis2. See help of this function.

Author

Maxime HERVE <[e-mail]>

Details

See adonis2 for detailed explanation of what is done. The only difference with adonis2 is that adonis.II performs type II tests instead of type I.

Examples

require(vegan)
data(dune)
data(dune.env)

# Compare:
adonis2(dune~Management*A1,by="terms",data=dune.env,permutations=99)
adonis2(dune~A1*Management,by="terms",data=dune.env,permutations=99)

# With:
adonis.II(dune~Management*A1,data=dune.env,permutations=99)
adonis.II(dune~A1*Management,data=dune.env,permutations=99)