randtest.pcaiv: Monte-Carlo Test on the percentage of explained (i.e....

In ade4: Analysis of Ecological Data : Exploratory and Euclidean Methods in Environmental Sciences

Description

Performs a Monte-Carlo test on on the percentage of explained (i.e. constrained) inertia. The statistic is the ratio of the inertia (sum of eigenvalues) of the constrained analysis divided by the inertia of the unconstrained analysis.

Usage

## S3 method for class 'pcaiv'
randtest(xtest, nrepet = 99, ...)
## S3 method for class 'cca'
randtest(xtest, nrepet = 99, ...)
## S3 method for class 'pcaivortho'
randtest(xtest, nrepet = 99, ...)

Arguments

xtest	an object of class pcaiv, pcaivortho or cca
nrepet	the number of permutations
...	further arguments passed to or from other methods

Value

a list of the class randtest

Author(s)

Stephane Dray [e-mail], original code by Raphael Pelissier

Examples

data(rpjdl)
millog <- log(rpjdl$mil + 1)
iv1 <- cca(rpjdl$fau, millog, scan = FALSE)
randtest(iv1)

ade4 documentation built on May 2, 2019, 5:50 p.m.