The “read.xlsx” Function in R

• Package: openxlsx

• Purpose: To read data from an Excel (.xlsx) file into a data frame.

• General Class: Input/Output

• Required Argument(s):

• xlsxFile: A character string giving the name of the Excel file to read from.

• sheet: A character string or index specifying the sheet from which to read data.

• Notable Optional Arguments:

  • rows: An optional range of rows to read (e.g., “1:100”).

  • cols: An optional range of columns to read (e.g., “A:C”).

  • colNames: A logical value indicating whether to read column names from the first row (default is TRUE).

• Example:

• # Example usage
  # Assume an Excel file named "data.xlsx" with a sheet named "Sheet1"
  # Read the data from the specified sheet into a data frame
  df <- read.xlsx("data.xlsx", sheet = "Sheet1")
  
  # Print the structure of the data frame
  str(df)

• In this example, the read.xlsx function from the openxlsx package is used to read data from an Excel file named “data.xlsx” and from the sheet named “Sheet1” into a data frame (df). The resulting data frame is then printed using the str function to display its structure.