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Formules de réactualisation en cas d’agrégations multiples. (Reactualization formulas in case of multiple aggregations). (French) Zbl 0674.62042
Summary: We consider the frequently observed situation where several class pairs correspond - simultaneously - to the highest value of the proximity index between classes, in the building of hiararchical classification, by an agglomerative procedure. The usual way consists of applying several times a reactualization formulae, before going on the next level of the classification tree. We propose only one reactualization, by the means of a formula taking into account the joining of more than two classes. This formula is established for the most classical association criteria between classes.

MSC:
62H30 Classification and discrimination; cluster analysis (statistical aspects)
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