The method was no doubt suggested to Clay’s ingenious mind by the colour of his accomplice’s hair. Sherlock Holmes in “The Red-Headed League” Contingency tables contain information about the joint distribution of statistical variables. For a large number of classes (for each variable) the resulting n × p frequency matrix can be hard to interpret. Correspondence analysis is a tool for developing simple indices that show us relations between row and column categories.
KeywordsContingency Table Singular Value Decomposition Correspondence Analysis Health Data Nonzero Eigenvalue
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