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Influence in Correspondence Analysis
Author(s) -
Pack P.,
Jolliffe I. T.
Publication year - 1992
Publication title -
journal of the royal statistical society: series c (applied statistics)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.205
H-Index - 72
eISSN - 1467-9876
pISSN - 0035-9254
DOI - 10.2307/2347568
Subject(s) - correspondence analysis , mathematics , statistics
SUMMARY The influence of individual observations in a correspondence analysis is investigated. Two alternative definitions of ‘observation’ are possible. For each definition, expressions are presented for influence on the plotting positions of rows and columns of the contingency table being analysed. Formulae for influence on the corresponding eigenvalues (principal inertias) are also given. There are connections for one definition of observation with results for canonical correlation analysis. An example is discussed in detail.