quasieuclid: Transformation of a distance matrice to a Euclidean one

Description Usage Arguments Details Value Author(s) Examples

Description

transforms a distance matrix in a Euclidean one.

Usage

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quasieuclid(distmat)

Arguments

distmat

an object of class dist

Details

The function creates a distance matrice with the positive eigenvalues of the Euclidean representation.
Only for Euclidean distances which are not Euclidean for numeric approximations (for examples, in papers as the following example).

Value

object of class dist containing a Euclidean distance matrice

Author(s)

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

Examples

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data(yanomama)
geo <- as.dist(yanomama$geo)
is.euclid(geo) # FALSE
geo1 <- quasieuclid(geo)
is.euclid(geo1) # TRUE
par(mfrow = c(2,2))
lapply(yanomama, function(x) plot(as.dist(x), quasieuclid(as.dist(x))))

par(mfrow = c(1,1))

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

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