Program 11

To generate a basic box plot using ggplot2, enhanced with notches and outliers and grouped by a categorical variable using an in-built data set R.

Step 1 : Load the required library

library(ggplot2)

Step 2 : Load the required 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 : Create box plot with notches

ggplot(iris, aes(x=Species, y=Sepal.Length)) +
  geom_boxplot(
    notch = TRUE,
    notchwidth = 0.6,
    outlier.colour = "black",
    fill = "pink" ) + 
labs(title="Box plot",
     x = "Species",
     y = "Sepal length") + 
  theme_minimal()