Program 9

Create multiple histograms using ggplot2::facet_wrap() to visualize how a variable(e.g.,Sepal.Length) is distributed across different groups(e.g., Species) in built-in R dataset.

Step 1: Load the required libraries

library(ggplot2)

Step 2: Load the dataset

data(iris)
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

Step 3: Creating histogram plot

ggplot(iris, aes(x= Sepal.Length)) + 
  geom_histogram(binwidth=0.3, fill="skyblue", color="black") +
  facet_wrap(~ Species) + 
  labs(title="Distribution of Sepal length by Species",
       x="Sepal Length(cm)",
       y="Frequency") +
  theme_minimal()