Change binwidth of ggplot2 Histogram Bars in R (Example Code)

In this R tutorial you’ll learn how to modify the binwidth of the bars in a ggplot2 histogram plot.

Preparing the Example

data(iris)                       # Loading an example data frame
head(iris)
#   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 1          5.1         3.5          1.4         0.2  setosa
# 2          4.9         3.0          1.4         0.2  setosa
# 3          4.7         3.2          1.3         0.2  setosa
# 4          4.6         3.1          1.5         0.2  setosa
# 5          5.0         3.6          1.4         0.2  setosa
# 6          5.4         3.9          1.7         0.4  setosa
install.packages("ggplot2")      # Install ggplot2 package
library("ggplot2")               # Load ggplot2 package
ggplot(iris,                     # Default settings
       aes(x = Sepal.Width)) +
  geom_histogram()

r graph figure 1 change binwidth ggplot2 histogram bars r

Example: Manually Adjust binwidth of ggplot2 Histogram

ggplot(iris,                     # Adjusted binwidth
       aes(x = Sepal.Width)) +
  geom_histogram(binwidth = 0.5)

r graph figure 2 change binwidth ggplot2 histogram bars r

Further Resources & Related Articles

Have a look at the following list of R programming language tutorials. They focus on similar topics as this post.

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