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, ].
Cet exercice fait partie du cours
Writing Efficient R Code
Instructions
The microbenchmark package is already loaded in your workspace.
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
# Which is faster, mat[1, ] or df[1, ]?
microbenchmark(___, ___)