We are performing a cluster analysis in the sample of the Portuguese National Health Survey that is a complex sample.
Does anyone know references on how a cluster analysis or principal component analysis can be performed taking into account the complex sample design? Or do you know any reference that indicates that complex sample design does not need to be taken into account in cluster analysis or PCA?
Many thanks in advance.
Department of Epidemiology,
Instituto Nacional de Sa˙de Dr. Ricardo Jorge
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