Is there any possible way to change the labels for the facet\_wrap variable, as displayed below. So, for example, instead of `cyl: 4`, `cyl: 6`, `cyl: 8`, I want it to read `condition: 4`, `condition: 6`, `condition: 8`. Of course, I can just do this by renaming the variable, but that's not what I want. This is a much simpler version of a custom function where I can't just rename a variable anyway I like. 

Another way to put this is, do I have any freedom to label the `facet_wrap` anyway I like? Kinda like how `x` aesthetic variable in `ggplot2` can have some name (e.g. `cyl`) in the dataframe (`mtcars`), but I can still replace it with my own name using `labs(x = "cylinder")`). I want to have something similar for `facet_wrap`. 

```r
library(dplyr)
library(datasets)
library(ggplot2)
data(mtcars)

# creating a dataframe
df <- dplyr::group_by(mtcars, .dots = c('cyl', 'am')) %>%
  dplyr::summarize(counts = n()) %>%
  dplyr::mutate(perc = (counts / sum(counts)) * 100) %>%
  dplyr::arrange(desc(perc))

# preparing the plot
ggplot2::ggplot(df, aes('', counts)) +
  geom_col(
    position = 'fill',
    color = 'black',
    width = 1,
    aes(fill = factor(am))
  ) +
  facet_wrap(~cyl, labeller = "label_both") + # faceting by `cyl` variable
  geom_label(
    aes(label = paste0(round(perc), "%"), group = factor(am)),
    position = position_fill(vjust = 0.5),
    color = 'black',
    size = 5,
    show.legend = FALSE
  ) +
  coord_polar(theta = "y")

```

![](https://i.imgur.com/bsVLUYB.png)

Created on 2018-02-19 by the [reprex package](http://reprex.tidyverse.org) (v0.2.0).