Example of flipped aes on geom_area() needs orientation?

[yutannihilation]

The third figure on the examples section of geom_ribbon/geom_area seems a bit confusing to me.

cc @thomasp85

The comment says

# Change orientation be switching the mapping

and I expected the left one below, but actually got the right one. Is the figure intended? Or, is this an example of failure to show the necessity of explicitly setting orientation = "y"?

library(ggplot2)

huron <- data.frame(year = 1875:1972, level = as.vector(LakeHuron))

# expected one?
p1 <- ggplot(huron) +
  geom_area(aes(x = year, y = level)) +
  coord_flip() +
  ggtitle("flipped by coord")

# orientation = "y"?
p2 <- ggplot(huron) +
  geom_area(aes(x = level, y = year)) +
  ggtitle("flipped by aes")

patchwork::wrap_plots(p1, p2)

^{Created on 2019-10-27 by the reprex package (v0.3.0)}

[thomasp85]

Good catch

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This old issue has been automatically locked. If you believe you have found a related problem, please file a new issue (with reprex) and link to this issue. https://reprex.tidyverse.org/