The original source is Winer (1971), p. 268. This was used as an example in Friendly (1991).
References
Friendly, M. (1991). SAS System for Statistical Graphics Cary, NC: SAS Institute, Output 7.28
Examples
data(drugs)
twoway(drugs)
#>
#> Mean decomposition (Dataset: "drugs"; Response: Value)
#> Residuals bordered by row effects, column effects, and overall
#>
#> drug1 drug2 drug3 drug4 roweff
#> + ---- ---- ---- ---- + ----
#> subj1 | -4.7 -0.7 2.5 2.9 : 9.1
#> subj2 | -1.7 0.3 1.5 -0.1 : 2.1
#> subj3 | -1.2 2.8 0.0 -1.6 : -0.4
#> subj4 | 4.3 -3.7 -0.5 -0.1 : -1.9
#> subj5 | 3.3 1.3 -3.5 -1.1 : -8.9
#> + .... .... .... .... + ....
#> coleff | -9.3 0.7 1.5 7.1 : 24.9
#>