How to Change Width of ggplot2 Histogram Bins in R (Example Code)

This article explains how to change the width of bins of a histogram in the R programming language.

Creation of Example Data

data(iris)                       # Load iris data set
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

Example: Changing the Bins of a Histogram Using ggplot2

install.packages("ggplot2")      # Install & load ggplot2
library("ggplot2")
ggplot(iris,                     # Default specification of bins
       aes(x = Sepal.Length)) +
  geom_histogram()

r graph figure 1 change width ggplot2 histogram bins r

ggplot(iris,                     # User-defined specification of bins
       aes(x = Sepal.Length)) +
  geom_histogram(bins = 5)

r graph figure 2 change width ggplot2 histogram bins r

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