R Programming Fundamentals

Activity: Implementing Data Summary

Scenario

You need to teach a coworker how to use apply functions. You write them a reproducible example using the mtcars dataset.

Aim

To summarize the variables in the mtcars data set using apply().

Prerequisites

Make sure you have R and RStudio installed on your machine. The datasets package should be installed.

Steps for Completion

1. Load the mtcars dataset, if it currently isn't loaded in your R environment, and examine the data with str().
2. Use apply() to summarize all of the variables in mtcars that are not categorical. Find the mean and variance of each.