The “subset” Function in R

The “subset” Function in R

Dec 15

Written By Michael Harris

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.