Graphics Reference
In-Depth Information
Figure
.
.
A trellis display of the detergent data from Figs.
.
and
.
levels of two variables are equal, i.e., the two barcharts are identical except for a scal-
ingfactor.hustheonlyindependencecanbefoundinthepanelforlowtemperature
and sot water. Obviously it is hard to compare the ratios for more than just two lev-
els per variable and for large absolute differences in the cell counts. Furthermore, it
is even harder to quantify and compare interactions. his is because it is nontrivial
to simultaneously judge the influence of differences in ratio and absolute cell sizes.
Nonetheless, there exist variations of mosaicplots (see Hofmann,
, Chapter
III.
same volume) that use an equal-sized grid to plot the data. Mosaic-plot vari-
Figure
.
.
A mosaicplot in multiple multiple-barchart variation of the detergent data set that conforms
exactly to the representation used in the trellis display of Fig.
.
