http://onlamp.com/pub/a/onlamp/2005/11/17/r_for_statistics.html?page=2
Index value plots follow a particular value of a variable over a specified amount of time. For the graph I chose we can folloe the fortune 500 companies and their values every day from January 1995 thru July 2005. This provides us with a detailed history and easy way to interpret the data which we are looking at.
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