Abstract
Producing the Principal Components Analysis of a data table requires choices which need to be explained in order to acquire complete understanding of the results. This explicitness opens the road to other possible choices, leading to the oretical research and many practical applications. Changes of scale, changes of variables, weighting of statistical units, decentering of the representations, and elimination of dependence between individuals are dealt with. After reviewing the usual methods from t h i s perspective, it can be seen that it is possible to transform them in order to better adapt mathematical abstractions to concrete situations.
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Escoufier, Y. (1987). The Duality Diagram: A Means for Better Practical Applications. In: Legendre, P., Legendre, L. (eds) Develoments in Numerical Ecology. NATO ASI Series, vol 14. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-70880-0_3
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DOI: https://doi.org/10.1007/978-3-642-70880-0_3
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