Options for (dis)similarity: Metric Non-metric Parametric Non-parametric( Metric, Non-metric, Parametric, Non-parametric ) (continuous) vs. Metric Non-metric Parametric Non-Parametric( Metric, Non-metric, Parametric, Non-Parametric ) (nominal, ordinal). Bray-Curtis is a popular example of a Metric Non-metric Parametric Non-parametric( Metric, Non-metric, Parametric, Non-parametric ) dissimilarity measure. Euclidean distance is an example of a Metric Non-metric Parametric Non-parametric( Metric, Non-metric, Parametric, Non-parametric ) dissimilarity measure.
nMDS = non-metric non- nominal non-parametric( non-metric, non-, nominal, non-parametric ) -metric multidimensional multi- measurement( -metric, multidimensional, multi-, measurement ) -dimensional decision dissimilarity( -dimensional, decision, dissimilarity ) scaling system species similarity( scaling, system, species, similarity ).
Clustering methods can be:
Hierarchical
Non-hierarchical
Either of the above
None of the above
Agglomerative
Divisive
In ecology and systematics, “cluster analysis” usually refers to Agglomerative Divisive( Agglomerative, Divisive ) Hierarchical Non-hierarchical( Hierarchical, Non-hierarchical ).
