David Meyer, Achim Zeileis, Kurt Hornik
Visualizing Independence Using Extended Association Plots
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Association plots---a visualization technique for the independence
problem in 2-way contingency tables---are extended in three directions:
  1. The visualization is enhanced by using colors for the
     importance of the residuals.
  2. The implementation currently available in R is improved using
     a more modular design and allowing a more flexible specification
     of plotting parameters.
  3. Two methods for the use of multi-way tables are proposed.