I am making a dotplot with lattice, as follows:
dd %>% dotplot( segment ~ transit_time, groups = impact, data = .,
as.table = TRUE,
pch = 16:17,
cex = 1.8,
scales = list(cex = 1.4),
auto.key = TRUE)
impact is a factor with two levels.
They key shows 2 open circles, one of each color of my two
plotting symbols, one for each group. I would like the
symbols in the key to match the plotting characters in the graph: 16
(filled circle) for one group and 17 (filled triangle) for the second
group. How would I do that? I have not had any success with supplying
arguments to auto.key, simpleKey, or key. Guess I'm not understanding
the syntax.
Thanks.
--Chris Ryan
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