Expanding a discrete scale by an additive constant doesn't work for single level factors

[gdmcdonald]

Similar to #2281 but apparently not fixed even with the latest version.

expand_scale(mult = 0, add = 2) doesn't add space around facets with only one discrete factor level in the facet. Doesn't seem like expected behaviour.

ggplot(data = mpg,
       aes(y = model,
           x = cyl,
           color = year))+
  geom_point()+
  facet_grid(manufacturer~.,drop = T, scales = "free_y", space = "free_y")+
  scale_y_discrete(expand = expand_scale(mult = 0, add = 2))+
  theme(strip.text.y = element_text(angle = 0))

[dpseidel]

This behavior was actually fixed in the scales 1.0.0 release. See below with the newest release of both scales and ggplot2.

library(ggplot2)
ggplot(data = mpg,
       aes(y = model,
           x = cyl,
           color = year))+
  geom_point()+
  facet_grid(manufacturer~.,drop = T, scales = "free_y", space = "free_y")+
  scale_y_discrete(expand = expand_scale(mult = 0, add = 2))+
  theme(strip.text.y = element_text(angle = 0))

packageVersion("scales")
#> [1] '1.0.0'
packageVersion("ggplot2")
#> [1] '3.1.0'

Created on 2018-11-20 by the reprex package (v0.2.0).

[gdmcdonald]

My apologies, didn't realise I needed to update the scales package.

[lock]

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/