correlogram.formula

From ape v2.6-3 by Emmanuel Paradis

Phylogenetic Correlogram

This function computes a correlogram from taxonomic levels.

Keywords: regression

Usage

correlogram.formula(formula, data = NULL, use = "all.obs")

Arguments

formula: a formula of the type y1+..+yn ~ g1/../gn, where the y's are the data to analyse and the g's are the taxonomic levels.
data: a data frame containing the variables specified in the formula. If NULL, the variables are sought in the user's workspace.
use: a character string specifying how to handle missing values (i.e., NA). This must be one of "all.obs", "complete.obs", or "pairwise.complete.obs", or any unambiguous abbrevation of these. In the first case, the presence of missing

Details

See the vignette in R: vignette("MoranI").

Value

An object of class correlogram which is a data frame with three columns:
obsthe computed Moran's I
p.valuesthe corresponding P-values
labelsthe names of each level
or an object of class correlogramList containing a list of objects of class correlogram if several variables are given as response in formula.

Examples

data(carnivora)
### Using the formula interface:
co <- correlogram.formula(SW ~ Order/SuperFamily/Family/Genus,
      data=carnivora)
co
plot(co)
### Several correlograms on the same plot:
cos <- correlogram.formula(SW + FW ~ Order/SuperFamily/Family/Genus,
      data=carnivora)
cos
plot(cos)

Documentation reproduced from package ape, version 2.6-3, License: GPL (>= 2)

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