Hi,
I am creating a multi-conditioned trellis plot. My data look something like
this:
Factor A Factor B IV DV
X 1
X 2
X 3
X 4
Y 1
Y 2
Y 3
Y 5
Z 1
Z 2
Z 3
Z 4
In one sense these data are suitable for trellis because for every level of
factor A there are four levels of factor B. However, the names of the factor
B levels depend on the level of factor A.
How would I create a 3 x 4 trellis plot where each panel is a combination of
factor A and factor B where the names of factor B are preserved and the
strip has two levels, one for factor A and another for factor B?
This was more difficult than I thought because trellis wants to generate 15
panels, as there are 3 levels of factor A and 5 levels of factor B. But
these 5 levels of factor B are in name only. There are only 4 different
levels of factor B for each level of factor A.
As a work around I am considering renaming the levels in factor A from 1 to
4 for all levels of factor B. Then, write a custom strip.default to specify
the names. However, I am not sure how to write this function. Would someone
help me get started?
Thanks,
Steve
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