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geom_boxplot with continuous x and without group aesthetics #992

krlmlr opened this Issue Aug 5, 2014 · 1 comment


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krlmlr commented Aug 5, 2014

d <- data.frame(x=rep(1:10, 100), y=runif(1000))
ggplot(d) + geom_boxplot(aes(x=x, y=y))

will happily produce a single box, while the intention is probably to produce the output of this code:

d <- data.frame(x=rep(1:10, 100), y=runif(1000))
ggplot(d) + geom_boxplot(aes(x=x, y=y, group=x))

Would a warning be appropriate here -- if x is continuous and the group aesthetics is missing?


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hadley commented Jun 11, 2015

Maaaaybe, but I like that there's currently one unifying principle for grouping (i.e. all discrete variable for a group). But if you feel strongly about, I'd review a PR to add a warning.

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