fourth.corner: calculates the fourth-corner statistic (according to Legendre...
In weimea: Weighted Mean Analysis

calculates the fourth-corner statistic (according to Legendre et al. 1997, compiled according to Peres-Neto et al. 2012)

fourth.corner(R, L, Q, chessel = FALSE)

## S3 method for class 'fc'
print(x, ...)

## S3 method for class 'fc'
summary(object, ...)

fourth.corner.ade(sitspe, speatt, env, fc.test, perm, chessel = FALSE)

`R, env`	Matrix of sample attributes.
`L, sitspe`	Matrix of species composition.
`Q, speatt`	Matrix of species attributes
`chessel`	Logical; should the Chessel's variant of the fourth corner statistic be returned? Default is `FALSE`
`x, object`	Object of 'cwm' class.
`...`	Other arguments passing into `print` or `summary` functions (not implemented yet).
`fc.test`	Test to be chosen for fourthcorner analysis.
`perm`	Number of permutations.

Chessel's version of the fourth corner statistic has been introduced by Peres-Neto et al. (2016), to rescale the fourth corner r statistic into the range of -1 and 1. This is achieved by dividing the observed fourth corner r by square root of the first eigenvalue for correspondance analysis of L (sitspe) matrix.

weimea documentation built on May 2, 2019, 4:44 p.m.