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`expression(list())` introduced when using labeller in facet

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
45/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
r

Research direction

Start by running the R reproduction in the issue with ggplotly, facet_wrap, and label_wrap_gen, then compare the two attached figures. Trace where the labeller output becomes the facet label; done means the second example no longer displays expression(list()) and still preserves the intended wrapped label.

Written by the indexing model from the issue text.

Description

When I am using labeller in facet_wrap I am getting expression(list()) showing up with ggplotly.

mtcars$cyl2 <- factor(mtcars$cyl, labels = c("alpha", "beta", "gamma"))
p <- ggplot(mtcars, aes(wt, mpg)) + geom_point()

ggplotly(p + facet_wrap(. ~cyl)) # See figure 1

ggplotly(p + facet_wrap(. ~cyl, labeller = label_wrap_gen(width = 25, multi_line = FALSE))) #see figure2

Figure 1

image

Figure 2

image

Dominant language
R
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