Search code examples
rggplot2facet-wrap

How to remove only some facet labels?

Using facet_wrap, is it possible to remove only some facet labels? In the following example I'd like the Species label to only appear in the first column of each row. I know I can use the labeller function but not how to change individual labels.

data(iris)
library(tidyr)
library(ggplot2)

dat <- iris %>%
  gather(var, val, Sepal.Length:Petal.Width) 

ggplot(dat) +
  geom_point(aes(x = 1, y = val)) +
  facet_wrap(Species~var)

enter image description here

Solution

  • It's not at all perfect, but I am posting this hoping it's still better than nothing.

    The use of as_labeller() and labeller() may get you what you need.

    Update

    Easiest solution was to split Species and var in two labellers functions.

    facet_labeller_top <- function(variable, value) {
  c(
    "Setosa", 
    "",
    "",
    "",
    "Versicolor", 
    "",
    "",
    "",
    "Virginica", 
    "",
    "",
    ""
  )
}

facet_labeller_bottom <- function(variable, value) {
  c(
    "Petal.Length", 
    "Petal.Width",
    "Sepal.Length",
    "Sepal.Width",
    "Petal.Length", 
    "Petal.Width",
    "Sepal.Length",
    "Sepal.Width",
    "Petal.Length", 
    "Petal.Width",
    "Sepal.Length",
    "Sepal.Width"
  )
}

    Result:

    ggplot(dat) +
  geom_point(aes(x = 1, y = val)) +
  facet_wrap(Species~var, labeller = labeller(Species=as_labeller(facet_labeller_top),
                                              var = as_labeller(facet_labeller_bottom)))

    enter image description here

    Data example:

    library(tidyr)
library(ggplot2)

dat <- iris %>%
  gather(var, val, Sepal.Length:Petal.Width)