The “geom_boxplot” Function in R

• Package: ggplot2

• Purpose: To create boxplots in ggplot.

• General Class: Geometric object for plotting boxplots.

• Required Argument(s): None

• Notable Optional Arguments:

• mapping: Aesthetic mappings.

• data: The data to be displayed in the plot.

• stat: The statistical transformation to use on the data for this layer.

• position: Position adjustment.

• width: Width of the boxes.

• fill: Box fill color.

• color: Box border color.

• outlier.color: Color for outlier points.

• outlier.shape: Shape of outlier points.

• outlier.size: Size of outlier points.

• notch: Logical, indicating whether to draw a notch around the median.

• Example:

• # Example usage
  library(ggplot2)
  
  # Create a data frame
  my_data <- data.frame(
  group = rep(c("A", "B", "C"), each = 50),
  values = rnorm(150)
  )
  
  # Create a ggplot object with a boxplot using geom_boxplot
  my_plot <- ggplot(data = my_data, aes(x = group, y = values)) +
  geom_boxplot(fill = "lightblue", color = "blue", notch = TRUE) +
  labs(title = "My Boxplot", x = "Groups", y = "Values")
  
  # Print the plot
  print(my_plot)

• In this example, the geom_boxplot function from the ggplot2 package is used to create a boxplot. The function allows customization of aesthetics such as fill color, border color, and the presence of a notch around the median. The required aesthetics are specified in the aes function.