The “unnest” Function in R

• Package: tidyr

• Purpose: To unnest a nested data frame column, expanding it into separate rows.

• General Class: Data Reshaping

• Required Argument(s):

• data: The data frame to reshape.

• ...: Columns to unnest.

• Notable Optional Arguments:

• None.

• Example (with Explanation):

• # Load necessary packages
  library(tidyr)
  
  # Create a sample data frame with a nested column
  data_tibble <- tibble(
  Group = c("A", "B"),
  data = list(data.frame(ID = 1:2, Value = c(10, 15)),
  data.frame(ID = 3:4, Value = c(20, 25)))
  )
  
  # Unnest the nested column 'data'
  result <- unnest(data_tibble, cols = data)
  
  # Display the result
  print(result)

• In this example, the unnest function from the tidyr package is used to reshape the sample data frame data_tibble by unnesting the nested column ‘data’. This expands the nested column into separate rows, effectively flattening the nested structure. Each row in the resulting data frame result corresponds to one row from the original nested data frame column, with the values of the nested columns duplicated accordingly.