Dissimilarity: To Configuration (monotone mds)...

A command that creates a Configuration object from a Dissimilarity object.

Dissimilarities δij and disparities dij are related by:

dijdkl if δijδkl


Number of dimensions
determines the number of dimensions of the configuration.
Primary or secondary approach to ties
When dissimilarities are equal, i.e., δij = δkl, the primary approach imposes no conditions on the corresponding disparities dij and dkl, while the secondary approach demands that also dij = dkl.

Finding the optimal Configuration involves a minimization process:

When successive values for the stress differ less than Tolerance the minimization process stops.
Maximum number of iterations
Minimization stops after this number of iterations has been reached.
Number of repetitions
When chosen larger than 1, the minimalization process will be repeated, each time with another random start configuration. The configuration that results in minimum stress will be saved.

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© djmw, April 7, 2004