Sieve Diagrams

A sieve diagram shows the frequencies in a two-way contingency table in relation to expected frequencies under independence, and highlights the pattern of association between the row and column variables. The sieve diagram was proposed by Riedwyl and Schüpbach in a technical report in 1983 and later called a parquet diagram (Riedwyl and Schüpbach, 1994).

Constructing the sieve diagram

In this display:

Examples, Demo, Software

This section from my short course, Categorical Data Analysis with Graphics shows several examples.
Form-based Demo
Enter your own data, and receive the graphic output.
The SAS/IML program which draws sieve diagrams. There's also a Sieve diagram sample (
SAS macro for sieve diagrams.

Michael Friendly Email: friendly AT yorku DOT ca