r ggplot how to adjust the column width of bar

user_3357059 0
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I need to figure out how to adjust the width of a plot for based on a a specific variable without having the change the scales = "free" parameter of facet_wrap function. I tried using the a case_when that adjusts the width of the bar based on the variable, but I get an error.enter image description here

below is reproducible example that shows the issue I'm having.

library(tidyverse)

set.seed(1)

data.frame(date = rep(seq.Date(Sys.Date()
                       , by = "day", length.out = 10), 3)
,Time = rep(c("AM","PM"), each = 30)
,office = rep(LETTERS[1:3], 2)
,n = sample(c(50:100),60, replace = TRUE)) %>%
add_row(date = Sys.Date(), Time = "AM", office = "Z", n = 80) %>%
ggplot(aes(x = date, y = n, group = office)) +
geom_bar(stat = 'identity', position = 'stack'
         ,width = .7, show.legend = FALSE, alpha =.75) +
facet_wrap(vars(office, Time), ncol = 2, labeller = "label_both",
           scales = "free")
facet-wrap ggplot2 r
1 Answers

If you don't specifically require use of facet_wrap(), you should use facet_grid(), which contains a very useful argument: space. Whereas scales allows the scale of each plot to resize according to "empty" data, space sort of does the same thing, but allows you to keep the same overall width of the bar constant.

data.frame(date = rep(seq.Date(Sys.Date()
                               , by = "day", length.out = 10), 3)
           ,Time = rep(c("AM","PM"), each = 30)
           ,office = rep(LETTERS[1:3], 2)
           ,n = sample(c(50:100),60, replace = TRUE)) %>%
  add_row(date = Sys.Date(), Time = "AM", office = "Z", n = 80) %>%
  ggplot(aes(x = date, y = n, group = office)) +
  geom_bar(stat = 'identity', position = 'stack'
           ,width = .7, show.legend = FALSE, alpha =.75) +
  facet_grid(office ~ Time, labeller = "label_both",
             scales = "free", space='free')

enter image description here

I do wish facet_wrap() had space as an argument, but alas, that is not the case at this time. If you need to have the facets all in one row or column, you can use facet_row() or facet_col() from the ggforce package. They allow the use of the space argument, but you are limited to only one row or column (not wrapping).

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