ade4 (version 1.01)

randtest.coinertia: Monte-Carlo test on a coinertia analysis (in C).

Description

Performs a Monte-Carlo test on a coinertia analysis.

Usage

randtest.coinertia(xtest, nrepet = 999, fixed=0, ...)

Arguments

xtest

an object of class 'coinertia'

nrepet

the number of permutations

fixed

when non uniform row weights are used in the coinertia analysis, this parameter must be the number of the table that should be kept fixed in the permutations

...

further arguments passed to or from other methods

Value

• a list of the class 'randtest'

References

Doledec, S. and Chessel, D. (1994) Co-inertia analysis: an alternative method for studying species-environment relationships. Freshwater Biology, 31, 277--294.

Examples

data(doubs)
dudi1 <- dudi.pca(doubs$mil, scale = TRUE, scan = FALSE, nf = 3)
dudi2 <- dudi.pca(doubs$poi, scale = FALSE, scan = FALSE, nf = 2)
coin1 <- coinertia(dudi1,dudi2, scan = FALSE, nf = 2)
plot(randtest(coin1))