Learning R for Data Visualization (Video 16)

This video tutorial covers how to add lines to plots using GGplot2, focusing on trendlines and fixed lines. It explains the concept of trendlines, including positive and negative correlations, and demonstrates how to add them to scatter plots using the GM_smooth function. The tutorial also shows how to add fixed vertical and horizontal lines to plots, such as histograms, using GM_Vline and GM_Hline functions. The video concludes with a brief overview of the next topic, which is adding text to plots.

Describe how to add a vertical line to a histogram in GG plot.

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What is the difference between adding a horizontal line and a vertical line in GG plot?

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