strip.placement = 'outside'

[dleopold]

There appears to be a problem rendering plots with facets when setting strip.placement='outside'. I see that the issue was referenced already #132. However, after updating to the github version of patchwork, there is still a problem but with a different error message:

library(ggplot2)
library(patchwork)
p <- ggplot(mpg, aes(displ, cty)) + 
  geom_point() +
  facet_grid(rows = vars(drv), switch='y') +
  theme(axis.title.y = element_blank(),
        strip.placement = 'outside')
p | p  

Error in FUN(X[[i]], ...) : subscript out of bounds

[tomlangbehn]

the issue seems to persist when facetting by rows and columns:

library(ggplot2)
library(patchwork)
p <- ggplot(mpg, aes(displ, cty)) + 
  geom_point() +
  facet_grid(rows = vars(drv), cols = vars(class), switch='y') +
  theme(axis.title.y = element_blank(),
        strip.placement = 'outside')
p | p 

Error in FUN(X[[i]], ...) : subscript out of bounds

[gregcox7]

Confirmed, this is still a problem when facetting by both rows and columns, but it looks like it occurs only when the facet labels are "switch"ed.

library(ggplot2)
library(patchwork)

# Works
p_rc_works <- ggplot(mpg, aes(displ, cty)) + 
    geom_point() +
    facet_grid(drv ~ class) +
    theme(strip.placement = 'outside')

print(p_rc_works + p_rc_works)

# Fails
p_rc_switch_y <- ggplot(mpg, aes(displ, cty)) + 
    geom_point() +
    facet_grid(drv ~ class, switch = "y") +
    theme(strip.placement = 'outside')

print(p_rc_switch_y + p_rc_switch_y)
# Error in FUN(X[[i]], ...) : subscript out of bounds

# Also fails
p_rc_switch_x <- ggplot(mpg, aes(displ, cty)) + 
    geom_point() +
    facet_grid(drv ~ class, switch = "x") +
    theme(strip.placement = 'outside')

print(p_rc_switch_x + p_rc_switch_x)
# Error in FUN(X[[i]], ...) : subscript out of bounds

[hummuscience]

I can confirm that this is still a problem as @gregcox7 mentions, it happens when axes are switched.

I understand that patchwork tries to align the plots usings X and Y axes. I am not sure what the best way is to solve this though