Exercise

Row timings

Similar to the previous example, the objects mat and df are a matrix and a data frame, respectively. Using microbenchmark(), how long does it take to select the first row from each of these objects?

To make the comparison fair, just use mat[1, ] and df[1, ].

Instructions

100 XP

The microbenchmark package is already loaded in your workspace.

Take Hint (-30 XP)