Stem-and-Leaf Plot

A stem-and-leaf plot of a quantitative variable is a textual graph that classifies data items according to their most significant numeric digits. In addition, we often merge each alternating row with its next row in order to simplify the graph for readability.

Example

In the data set faithful, a stem-and-leaf plot of the eruptions variable identifies durations with the same two most significant digits, and queue them up in rows.

Problem

Find the stem-and-leaf plot of the eruption durations in faithful.

Solution

We apply the stem function to compute the stem-and-leaf plot of eruptions.

Answer

The stem-and-leaf plot of the eruption durations is

Exercise

Find the stem-and-leaf plot of the eruption waiting periods in faithful.