provenance (version 1.4)

MDS: Multidimensional Scaling

Description

Performs classical or nonmetric Multidimensional Scaling analysis

Multidimensional Scaling of compositional data

Multidimensional Scaling of distributional data

Multidimensional Scaling of a dissimilarity matrix

Usage

MDS(x, ...)
## S3 method for class 'compositional':
MDS(x, classical = FALSE, ...)
## S3 method for class 'distributional':
MDS(x, classical = FALSE, ...)
## S3 method for class 'diss':
MDS(x, classical = FALSE, ...)

Arguments

x

an object of class distributional, compositional or diss

...

optional arguments to be passed onto diss (if x is of class compositional or distributional) or onto cmdscale or isoMDS (if x is of class dist).

classical

boolean flag indicating whether classical (TRUE) or nonmetric (FALSE) MDS should be used

Value

• an object of class MDS, i.e. a list containing the following items:

  points: a two column vector of the fitted configuration

  classical: a boolean flag indicating whether the MDS configuration was obtained by classical (TRUE) or nonmetric (FALSE) MDS.

  diss: the dissimilarity matrix used for the MDS analysis

  stress: (only if classical=TRUE) the final stress achieved (in percent)

Examples

data(Namib)
plot(MDS(Namib$Major,classical=TRUE))