R Program to sort a given data frame by multiple column(s).
R Program to drop row(s) by number from a given data frame.
R Program to drop column(s) by name from a given data frame.
R Program to get the statistical summary and nature of the data of a given data frame.
R Program to get the structure of a given data frame.
R Program to find the unique rows in r data frame.
R Program to extract or replace parts of a factor.
R Program to add new row(s) to an existing data frame.
R Program to add a new column in a given data frame.
R Program to replace NA values with 5 in a given data frame.