The “write.amelia” Function in R

• Package: Amelia

• Purpose: Write imputed datasets to disk.

• General class: Export

• Required argument(s):

• obj: An Amelia object containing the imputed datasets.

• file.stem: A character string representing the file name stem to which the datasets will be saved.

• Notable optional arguments:

• format: The file format to use. Options include “csv”, “RData”, and “stata” (default is “csv”).

• separate: Logical. Whether to save each imputed dataset as a separate file (default is TRUE).

• Example:

• # Load the required library
  library(Amelia)
  
  # Create a sample dataset with missing values
  data <- data.frame(
  id = 1:10,
  time = 1:10,
  x1 = c(1, 2, NA, 4, 5, 6, NA, 8, 9, 10),
  x2 = c(5, NA, 7, 8, 9, 10, 11, 12, NA, 15)
  )
  
  # Perform multiple imputation using the amelia function
  amelia_output <- amelia(x = data, m = 5, idvars = "id", ts = "time")
  
  # Write the imputed datasets to disk
  write.amelia(amelia_output, file.stem = "imputed_data", format = "csv")

• In this example, the amelia function from the Amelia package is used to perform multiple imputation on a sample dataset with missing values. The imputed datasets are stored in the amelia_output object. The write.amelia function is then used to write these imputed datasets to disk with the file name stem “imputed_data” in CSV format.