Influence in Correspondence Analysis
研究了单个观测值在对应分析中的影响，给出了两种观测定义下对行列坐标和特征值影响的表达式，并讨论了与典型相关分析的联系。
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.