seqmds.stress: Stress measure of multidimensional scaling factors

In seqhandbook: Miscellaneous Tools for Sequence Analysis

Stress measure of multidimensional scaling factors

Description

Computes stress measure of multidimensional scaling data for different number of dimensions of the represented space

Usage

seqmds.stress(seqdist, mds)

Arguments

seqdist	a dissimilarity matrix or a dist object (see dist)
mds	a matrix with coordinates in the represented space (dimension 1 in column 1, dimension 2 in column 2, etc.)

Value

A numerical vector of stress values.

Author(s)

Nicolas Robette

References

Piccarreta R., Lior O. (2010). Exploring sequences: a graphical tool based on multi-dimensional scaling, Journal of the Royal Statistical Society (Series A), Vol. 173(1), 165-184.

Examples

data(trajact)
seqact <- seqdef(trajact)
dissim <- seqdist(seqact, method="HAM")
mds <- cmdscale(dissim, k=20, eig=TRUE)
stress <- seqmds.stress(dissim, mds)
plot(stress, type='l', xlab='number of dimensions', ylab='stress')

seqhandbook documentation built on April 3, 2023, 5:45 p.m.