Remove inner labels in ggplot with nested facets and free y-axis (facet_wrap2

I have a data frame with various categorical variables and one count variable. The variables are nested within each other. E.g. there are three trials, within each trial two groups, and both of those groups answer the same items (which can differ between the trials, but not between groups).

set.seed(32123)
test <- tibble(
  trial  = rep(c("Trial_A", "Trial_B", "Trial_C"), each = 3, times = 8),
  group  = rep(c("A", "B"), each = 36),
  result = rep(c("Fail", "Pass"), times = 36),
  item   = rep(c("item 1", "item 2", "item 3", "item 4"), each = 6, times = 3),
  tries  = round(runif(n = 72, min = 0, max = 20))) %>%
  mutate(item = case_when(item == "item 4" & group == "B" & trial == "Trial_C" ~ "item 3",
                          item == "item 3" & group == "B" & trial == "Trial_C" ~ "item 2",
                          item == "item 3" & group == "B" & trial == "Trial_A" ~ "item 2",
                          item == "item 2" & group == "B" & trial == "Trial_A" ~ "item 1",
                          TRUE ~ item))

Using ggplot2 and the facet_wrap2 function from the ggh4x package

CodePudding user response：

If you flip the x and y-aesthetic (making coord_flip() unnessary), you can use ggh4x::facetted_pos_scales() to explicitly remove the axis guide for the second column.

library(ggplot2)
library(ggh4x)
library(tibble)
library(dplyr)

set.seed(32123)
test <- tibble(
  trial  = rep(c("Trial_A", "Trial_B", "Trial_C"), each = 3, times = 8),
  group  = rep(c("A", "B"), each = 36),
  result = rep(c("Fail", "Pass"), times = 36),
  item   = rep(c("item 1", "item 2", "item 3", "item 4"), each = 6, times = 3),
  tries  = round(runif(n = 72, min = 0, max = 20))) %>%
  mutate(item = case_when(item == "item 4" & group == "B" & trial == "Trial_C" ~ "item 3",
                          item == "item 3" & group == "B" & trial == "Trial_C" ~ "item 2",
                          item == "item 3" & group == "B" & trial == "Trial_A" ~ "item 2",
                          item == "item 2" & group == "B" & trial == "Trial_A" ~ "item 1",
                          TRUE ~ item))

ggplot(test, aes(x = tries, y = item, fill = result))  
  geom_bar(position = "fill", stat = "identity")  
  facet_wrap2(dplyr::vars(trial, group),  # ggh4x package for nested facets
              strip = strip_nested(),    # sub facets normal
              scales = "free_y", nrow = 3, axes = "margins",
              remove_labels = "all")  
  facetted_pos_scales(
    y = list(COL == 2 ~ scale_y_discrete(guide = 'none'))
  )  
  theme(axis.title.x = element_blank())

^{Created on 2022-08-17 by the reprex package (v2.0.1)}

Perhaps the documentation of facet_wrap2() should be clearer on when these arguments work.