programm11

To generate a basic box plot using ggplot2 enhanced with notches and outliers and grouped by a categorical variable

step 1: load library

library(ggplot2)

step 2: load dataset

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 a boxplot

ggplot(data=iris , aes(y=Sepal.Length, x=Species))+
  geom_boxplot(
    notch = TRUE,
    notchwidth = 0.77,
    staplewidth=0.3,
    fill="grey",
    color="black",
    outlier.shape ="square" ,
    outlier.color = "yellow",
    
  )+
  labs(
    title="plotting of boxplot",
    x="species",
    y="sepal length"
  )+
  theme_minimal()