randtest.coinertia {ade4} | R Documentation |
Performs a Monte-Carlo test on a coinertia analysis.
randtest.coinertia(xtest, nrepet = 999, fixed=0, ...)
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 |
a list of the class randtest
Doledec, S. and Chessel, D. (1994) Co-inertia analysis: an alternative method for studying species-environment relationships. Freshwater Biology, 31, 277–294.
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))