View source: R/seqmds.stress.R

seqmds.stress | R Documentation |

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

```
seqmds.stress(seqdist, mds)
```

`seqdist` |
a dissimilarity matrix or a dist object (see |

`mds` |
a matrix with coordinates in the represented space (dimension 1 in column 1, dimension 2 in column 2, etc.) |

A numerical vector of stress values.

Nicolas Robette

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.

```
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')
```

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