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  3. Introduction to Data Visualization with ggplot2

Exercise

Using geoms for explanatory plots

Let's focus on producing beautiful and effective explanatory plots. In the next couple of exercises, you'll create a plot that is similar to the one shown in the video using gm2007, a filtered subset of the gapminder dataset.

This type of plot will be in an info-viz style, meaning that it would be similar to something you'd see in a magazine or website for a mostly lay audience.

A scatterplot of lifeExp by country, colored by lifeExp, with points of size 4, is provided.

Instructions 1/4

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geom_segment() adds line segments and requires two additional aesthetics: xend and yend. To draw a horizontal line for each point, map 30 onto xend and country onto yend.