How to plot multiple lines on the same graph using R

In this tutorial, you will find step-by-step instructions to create line graphs, especially multiple line graphs, and to place legends right on top of the lines. We will use R and ggplot2 to create these plots. You will learn about a few best data viz practices along the way. To find more dataviz recipes and best-practices go to:

Here are the files used in this tutorial:
-- Complete R code file:
-- Apple stocks data file:
-- Tech stocks data file:
-- Entertainment stocks data file:

A couple of books mentioned in the tutorial:
-- White Space is Not Your Enemy by Kim Golombisky
-- Visualizing Data by William Cleveland

Also, read more about the banking function in R here:
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An another good paper on banking by Jeff Heer:

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