Question

What is the function to set row names for a data frame?

(a) row.names()

(b) colnames()

(c) col.names()

(d) column name cannot be set for a data frame

I had been asked this question in final exam.

My question is from Basics topic in section History, Overview and Getting Started of R Programming

Answer 1

The correct choice is (a) row.names()

Explanation: row.names() is the function to set row names for a data frame. Data frames have a special attribute called row.names, which indicate information about each row of the data frame.