Monte-Carlo Test on the sum of the singular values of a procustean rotation (in R).

Description

performs a Monte-Carlo Test on the sum of the singular values of a procustean rotation.

Usage

procuste.rtest(df1, df2, nrepet = 99)

Arguments

Value

returns a list of class rtest

Author(s)

Daniel Chessel
Anne B Dufour anne-beatrice.dufour@univ-lyon1.fr

References

Jackson, D.A. (1995) PROTEST: a PROcustean randomization TEST of community environment concordance. Ecosciences, 2, 297–303.

Examples

data(doubs)
pca1 <- dudi.pca(doubs$env, scal = TRUE, scann = FALSE)
pca2 <- dudi.pca(doubs$fish, scal = FALSE, scann = FALSE)
proc1 <- procuste(pca1$tab, pca2$tab)
protest1 <- procuste.rtest(pca1$tab, pca2$tab, 999)
protest1
plot(protest1)