dist.dudi {ade4}R Documentation

Computation of the Distance Matrix from a Statistical Triplet

Description

computes for a statistical triplet a distance matrix.

Usage

dist.dudi(dudi, amongrow = TRUE)

Arguments

dudi a duality diagram, object of class dudi
amongrow a logical value computing the distance if TRUE, between rows, if FALSE between columns.

Value

an object of class dist

Author(s)

Daniel Chessel
Stéphane Dray dray@biomserv.univ-lyon1.fr

Examples

data (meaudret)
pca1 <- dudi.pca(meaudret$mil, scan = FALSE)
sum((dist(scalewt(meaudret$mil)) - dist.dudi(pca1))^2)
#[1] 4.045e-29 the same thing

Worked out examples


> library(ade4)
> ### Name: dist.dudi
> ### Title: Computation of the Distance Matrix from a Statistical Triplet
> ### Aliases: dist.dudi
> ### Keywords: array multivariate
> 
> ### ** Examples
> 
> data (meaudret)
> pca1 <- dudi.pca(meaudret$mil, scan = FALSE)
> sum((dist(scalewt(meaudret$mil)) - dist.dudi(pca1))^2)
[1] 3.774206e-29
> #[1] 4.045e-29 the same thing
> 
> 
> 
>
[Package ade4 Index]