The “subset” Function in R

• Package: Base R (no specific package required)

• Purpose: Subsets a data frame or vector based on specified conditions.

• General Class: Data Manipulation

• Required Argument(s):

• x: The data frame or vector to be subsetted.

• subset: A logical expression indicating the conditions for subsetting.

• Notable Optional Arguments:

• select: A vector specifying which columns to select from the data frame.

• drop: A logical value indicating whether to drop unused levels from factors.

• Example:

• # Example data frame
  data_df <- data.frame(ID = 1:5, Name = c("Alice", "Bob", "Charlie", "David", "Eva"), Age = c(25, 30, 22, 28, 35))
  
  # Subset data frame to include only rows where Age is greater than 25
  subset_df <- subset(data_df, Age > 25)
  
  # Display the subsetted data frame
  print(subset_df)

• In this example, the subset function is used to subset a data frame (data_df) to include only rows where the “Age” column is greater than 25. The result is a subsetted data frame (subset_df) containing only the rows that satisfy the specified condition.